To reset a Lennox air conditioner, locate the reset button and press it to restore the unit to its factory settings. Lennox air conditioners have a convenient reset button that allows users to restore their units to their original factory settings.
This can be useful if the air conditioner is not functioning properly or if you want to clear any programming changes that have been made. By simply locating the reset button on the unit and pressing it, you can easily reset your Lennox air conditioner.
We will guide you through the process of finding and using the reset button on your Lennox air conditioner, ensuring your unit is operating efficiently and effectively.
What Is The Lennox Air Conditioner Reset Button?
The Lennox Air Conditioner Reset Button is a feature that allows you to reset the system if it shuts down unexpectedly or encounters an issue. By pressing this button, you can easily restore the air conditioner to its normal settings and functionality without the need for professional assistance.
Definition Of The Lennox Air Conditioner Reset Button
The Lennox Air Conditioner Reset Button is an important feature found in Lennox air conditioning systems. It serves as a troubleshooting tool that can help resolve various issues that may arise within the HVAC system. This reset button allows users to reset the system and restore it to its default settings, helping to address minor glitches or malfunctions.
Importance Of The Reset Button In Troubleshooting Hvac Systems
The Lennox Air Conditioner Reset Button plays a crucial role in troubleshooting HVAC systems and offers several benefits for both homeowners and technicians:
- Easy system reset: When faced with issues like the system not turning on, ineffective cooling or heating, or unusual error codes on the display, the reset button can be pressed to quickly reset the system. This often resolves minor issues without the need for extensive troubleshooting or calling a technician.
- Restoring default settings: The reset button allows the system to revert back to its factory default settings. This can be useful in cases where incorrect settings or programming changes have been made, resulting in poor performance or malfunctions. By simply pressing the reset button, the system can be restored to its original settings, eliminating any potential problems caused by improper adjustments.
- Clearing error codes: In some instances, the HVAC system may display error codes indicating specific issues. The reset button can be used to clear these error codes after the underlying problem has been resolved. This ensures that the system is ready to function optimally without any lingering error messages.
- Troubleshooting without professional assistance: The reset button provides homeowners with an opportunity to troubleshoot minor issues without the need for professional assistance. This not only saves time but also avoids unnecessary service calls or repair costs.
- Proactive maintenance: Regularly using the reset button can help identify and resolve minor issues before they escalate into major problems. By resetting the system periodically, users can ensure that their HVAC system remains in good working condition and minimize the risk of unexpected breakdowns or malfunctions.
- Compatibility with Lennox systems: The reset button is specifically designed for Lennox air conditioning systems, making it a valuable tool for troubleshooting. It ensures that users are equipped with a manufacturer-approved method to address issues and maintain the performance of their Lennox HVAC system.
The Lennox Air Conditioner Reset Button is an essential feature that allows users to reset their HVAC system, restore default settings, clear error codes, and troubleshoot minor issues. It serves as a helpful tool for both homeowners and technicians by providing a simple and effective solution to common HVAC problems.
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Common Issues That Can Be Resolved With The Reset Button
Resolve common issues with your Lennox air conditioner using the reset button. Regain control over your cooling system with this simple and effective solution.
Whether you have noticed a sudden change in the efficiency of your Lennox air conditioner or it has completely stopped working, the reset button could be the solution to your problem. Resetting your air conditioner can help address various common issues that often arise with HVAC systems.
In this section, we will provide an overview of these common problems, explain how the reset button can offer a solution, and emphasize the importance of knowing when and how to use it.
Overview Of Common Hvac Problems:
- Malfunctioning Thermostat: If your air conditioner fails to cool your home or turns on and off randomly, it could be due to a malfunctioning thermostat. A quick reset can often recalibrate the thermostat and resolve the issue.
- Power Surges: Power surges can disrupt the functioning of your air conditioner, causing it to shut down or display erratic behavior. The reset button acts as a safeguard when the system is overloaded, allowing it to restore normal performance.
- Circuit Breaker Trips: An overloaded circuit can cause the air conditioner’s circuit breaker to trip, resulting in a complete shutdown. The reset button provides a convenient way to reset the circuit breaker and restore power to the system.
- Freeze-ups: In humid climates, air conditioners are susceptible to freeze-ups, where the coils become covered in ice. Resetting the system helps defrost the coils and get the air conditioner working again.
- Sensor Issues: Sensors play a crucial role in regulating the temperature and performance of your air conditioner. However, they can sometimes malfunction, leading to inaccurate readings and improper functioning. A reset can recalibrate the sensors and resolve the issue.
How The Reset Button Can Provide A Solution:
- System Reboot: The reset button essentially provides a fresh start for your Lennox air conditioner. It acts as a system reboot, allowing the unit to clear any temporary glitches or errors that may be hindering its performance.
- Restoring Default Settings: Resetting your air conditioner can revert any changes or settings that may have been made inadvertently or incorrectly. It helps restore the default configurations, ensuring optimal functionality of the system.
- Overcoming Minor Faults: Many common HVAC problems can be resolved with a simple reset. By cutting off power momentarily and restarting the system, the reset button can help clear minor faults and errors, saving you from the hassle of calling a technician.
Importance Of Knowing When To Use The Reset Button:
- Avoid Costly Service Calls: Before contacting a professional technician and incurring service charges, knowing when to use the reset button can save you time and money. Minor issues often have simple solutions, and resetting your air conditioner can be the first step in troubleshooting.
- Quick Troubleshooting: Having knowledge about the reset button and when it can be used allows you to quickly troubleshoot potential issues. Instead of waiting for professional assistance, you can attempt a reset and see if it resolves the problem.
- Maintaining Efficiency: Regular maintenance and upkeep play a significant role in preserving the efficiency of your HVAC system. Knowing when to use the reset button for common issues can help ensure that your air conditioner functions at its peak performance, keeping your home cool and comfortable.
The reset button on your Lennox air conditioner can be a valuable tool for resolving common HVAC problems. By understanding the common issues it can address, how it provides a solution, and the importance of knowing when to use it, you can effectively troubleshoot and maintain the efficiency of your air conditioning system.
How To Locate The Reset Button On A Lennox Air Conditioner
The reset button on a Lennox air conditioner can be easily located by referring to the user manual or consulting the manufacturer’s website for specific instructions. It is important to follow the guidelines provided to ensure safe and proper operation of the unit.
Step-By-Step Guide To Finding The Reset Button On A Lennox Ac Unit
If you are experiencing issues with your Lennox air conditioner and suspect that resetting it might help, you are in the right place. In this section, we will guide you through the process of locating the reset button on your Lennox AC unit.
Understanding the layout of your air conditioner is crucial for this task, so let’s get started!
Locating The Reset Button On A Lennox Air Conditioner:
To find the reset button on your Lennox AC unit, follow these simple steps:
- Check the control panel: The reset button is typically located on the control panel of your Lennox air conditioner. Look for a small button labeled “Reset” or an icon that resembles a circular arrow.
- Inspect the front or side panel: In some Lennox AC units, the reset button may be located on the front or side panel. Carefully examine the appliance to see if there is a visible reset button in these areas.
- Refer to the user manual: If you are unable to locate the reset button using the previous methods, consult the user manual that came with your Lennox air conditioner. The manual should provide detailed instructions on how to find and operate the reset button specific to your model.
- Try the control board: In certain Lennox AC models, the reset button might be integrated into the control board. In this case, you will need to remove the access panel to find the button. Please ensure you have experience working with electrical components or seek professional assistance to avoid any potential hazards.
- Contact Lennox customer support: If you have exhausted all other options and still cannot find the reset button, it is advisable to reach out to Lennox’s customer support team. They will be able to provide you with accurate guidance and assistance tailored to your specific Lennox AC unit.
By following these steps, you will be able to locate the reset button on your Lennox air conditioner and proceed with resetting it if necessary. Remember to exercise caution and refer to the user manual or seek professional help when needed.
Precautions And Safety Measures
The Lennox Air Conditioner Reset Button is an essential safety feature that allows you to restart your unit after a malfunction or power outage. By following the necessary precautions and safety measures, you can ensure the proper functioning and longevity of your air conditioner.
Importance Of Safety Precautions Before Resetting The Air Conditioner:
- Safety should always be the top priority when dealing with any electrical appliance. Before attempting to reset your Lennox air conditioner, it is crucial to take certain precautions to prevent any accidents or damage. Here are some key points to keep in mind:
- Read the Manufacturer’s Manual: Familiarize yourself with the specific instructions provided by the manufacturer. Each air conditioner model may have unique guidelines for resetting.
- Turn Off the Power: Before touching any part of the air conditioner or attempting a reset, make sure to turn off the power supply to the unit. This can be done by switching off the corresponding circuit breaker or unplugging it from the power source.
- Wear Protective Gear: Handling electrical components carries potential risks. To ensure your safety, it is advisable to wear safety gloves and goggles. These protective gears can protect you from any electrical shocks or flying debris.
- Keep a Safe Distance: While resetting the air conditioner, it is important to maintain a safe physical distance from any moving parts or the unit itself. This minimizes the risk of injury from sudden movements or contact with the spinning fan blades.
- Avoid Moisture: Never attempt to reset the air conditioner if your hands or the area surrounding the unit is wet. Moisture can conduct electricity, increasing the possibility of shocks. Wait until everything is dry before proceeding.
Tips For Ensuring Personal Safety During The Reset Process:
- Now that you are aware of the importance of safety precautions, let’s discuss some tips to ensure your personal safety while resetting the Lennox air conditioner:
- Begin with the Power Off: Ensure the air conditioner is completely turned off and disconnected from the power source before attempting any reset. This eliminates the risk of electric shock while working on the internal components.
- Take Regular Breaks: Resetting the air conditioner can be a time-consuming process. To avoid exhaustion or rushing, take regular breaks to rest and recharge. This allows you to maintain focus and follow safety procedures without compromising your well-being.
- Follow the Proper Sequence: When resetting the air conditioner, it is essential to follow the correct sequence of steps outlined in the manufacturer’s manual. Skipping or missing a step can lead to incorrect resets or potential damage to the unit.
- Use Tools Properly: If any tools are required during the reset, ensure you are using them correctly and following the instructions provided. Proper tool usage reduces the likelihood of accidents and ensures a successful reset.
- Seek Professional Help When Necessary: If you are unsure about the reset process or encounter any issues, it is always best to seek assistance from a professional technician. They have the expertise and knowledge to perform the reset safely and effectively.
Remember, safety should never be compromised. By following these precautions and tips, you can reset your Lennox air conditioner with confidence, minimizing the risk of accidents and ensuring your personal well-being. Stay safe and enjoy the benefits of a properly functioning air conditioner!
Steps To Reset The Lennox Air Conditioner
To reset your Lennox Air Conditioner, follow these steps: locate the reset button on the unit, press and hold it for about 10 seconds, then release it. This will reset the system and restore it to its default settings.
Is your Lennox air conditioner acting up? Don’t worry, a simple reset may be all it needs to get it up and running again. Follow these easy steps to reset your Lennox air conditioner and restore its functionality.
Step 1: Turning Off The Power To The Unit
Before attempting any reset, it’s crucial to turn off the power to your Lennox air conditioner. This step ensures your safety while also preventing any potential electrical damage to the unit. Locate the main power switch or circuit breaker connected to the air conditioner and switch it off.
Step 2: Locating The Reset Button
Once you’ve turned off the power, the next step is to find the reset button. The reset button is typically located either on the unit itself or on the indoor air handler. Refer to your Lennox air conditioner’s user manual for specific instructions on locating the reset button if you can’t find it easily.
Step 3: Pressing And Holding The Reset Button
With the reset button in sight, press and hold it down for approximately 10 seconds. Be sure to apply consistent pressure throughout the duration of the reset process. This action allows the Lennox air conditioner to reboot and clear any temporary glitches that may have caused the malfunction.
Step 4: Waiting For The Unit To Reset
After releasing the reset button, allow the Lennox air conditioner a few moments to complete the reset process. During this time, the unit is recalibrating and re-establishing the necessary connections. It’s essential to exercise patience and refrain from any further interaction with the unit during this waiting period.
Step 5: Turning On The Power And Testing The Unit
Once an adequate amount of time has passed, it’s time to restore power to your Lennox air conditioner. Locate the main power switch or circuit breaker and turn it back on. Carefully observe the unit for any signs of unusual behavior or error codes.
If everything appears normal, you can proceed with testing the unit to ensure it is running as expected. Adjust the temperature settings and monitor the air conditioner’s performance to confirm that the reset has resolved the issue.
Remember, if your Lennox air conditioner continues to experience problems even after attempting a reset, it may be time to contact a professional technician for further assistance. Implementing these simple steps can often save you time and money by resolving minor issues on your own.
So, why not give it a try?
Troubleshooting Common Hvac Issues With The Reset Button
Tackle common HVAC issues with the Lennox air conditioner reset button. Resetting can solve problems like unit not starting or cooling. Learn how to utilize this function effectively.
Lennox Air Conditioner Reset Button
If you’re experiencing some issues with your Lennox air conditioner, don’t let it stress you out. Many common HVAC problems can be resolved by simply pressing the reset button. In this section, we’ll explore a few scenarios where resetting the air conditioner can get things back in working order.
Resetting The Air Conditioner For A Frozen Coil:
- If you notice that your air conditioner is not cooling effectively or is producing warm air, there may be a problem with the evaporator coil freezing up. Here’s how to reset the air conditioner for this issue:
- Locate the reset button on the unit, usually near the outdoor condenser unit.
- Press and hold the reset button for about 10 seconds.
- Release the button and wait for the unit to complete the reset process.
- Once the reset is complete, you should feel cool air coming out of the vents again.
Resetting The Air Conditioner For A Tripped Circuit Breaker:
- If your air conditioner suddenly stops working and you suspect a tripped circuit breaker, follow these steps to reset the air conditioner:
- Locate your home’s main electrical panel.
- Identify the circuit breaker that controls the air conditioner’s power.
- If the breaker is in the “off” position, switch it to the “on” position.
- Wait a few minutes for the air conditioner to reset and start working again.
Resetting The Air Conditioner For A Malfunctioning Thermostat:
- If you’re having trouble with your air conditioner not turning on or not reaching the desired temperature, the thermostat could be the culprit. Here’s how to reset the air conditioner for this issue:
- Locate the reset button on the thermostat, usually on the front or back.
- Use a small tool, such as a paperclip, to press and hold the reset button for a few seconds.
- Release the button and wait for the thermostat to reset.
- Set your desired temperature on the thermostat and check if the air conditioner responds accordingly.
Remember, the reset button is designed to resolve common issues and should be used as a troubleshooting step before calling for professional help. If the problem persists after resetting the air conditioner, it’s best to contact a qualified technician to diagnose and resolve the issue.
Regular Maintenance And Cleaning
Regular maintenance and cleaning are essential to keep your Lennox air conditioner performing efficiently. In case of any issues, simply locate and press the reset button to restore the unit’s functionality. Stay cool and save energy with proper care.
Importance Of Routine Maintenance For Hvac Systems
Regular maintenance and cleaning of your Lennox air conditioner unit is crucial to ensure optimal performance and extend its lifespan. By following a routine maintenance schedule, you can prevent costly repairs, improve energy efficiency, and maintain a comfortable indoor environment.
Here are some reasons why regular maintenance is essential for your HVAC system:
- Enhanced Efficiency: Dust, dirt, and debris can accumulate on the condenser coils and filters of your air conditioner, hindering airflow and reducing efficiency. Regular cleaning helps remove these contaminants and allows the unit to operate at its full potential, saving you money on energy bills.
- Prevention of Breakdowns: Routine maintenance enables the early detection and resolution of minor issues before they escalate into major problems. This proactive approach can prevent unexpected breakdowns and ensure uninterrupted cooling during the hot summer months.
- Improved Air Quality: A well-maintained air conditioner can significantly improve indoor air quality by reducing the circulation of allergens, mold, and pollutants. By regularly cleaning or replacing the air filters, you can ensure that the air circulating in your home is clean and free from irritants.
- Extended Lifespan: Neglecting maintenance can shorten the lifespan of your Lennox air conditioner. Regular upkeep, including cleaning coils, lubricating moving parts, and checking electrical connections, helps prolong the life of your unit, maximizing your investment.
- Warranty Compliance: Some manufacturers require regular maintenance as a condition for honoring warranty claims. By adhering to the recommended maintenance schedule, you can protect your warranty coverage and avoid unnecessary expenses.
Tips For Cleaning And Maintaining The Air Conditioner Unit
To keep your Lennox air conditioner running smoothly, regular cleaning and maintenance are essential. Here are some tips to maintain and clean your AC unit effectively:
- Turn off Power: Before working on your air conditioner, ensure that you turn off the power supply to avoid any electrical hazards.
- Clean or Replace Air Filters: Dirty or clogged filters restrict airflow and reduce the efficiency of your unit. Clean or replace the filters regularly to maintain optimal performance.
- Inspect and Clean Condenser Coils: Over time, the condenser coils can accumulate dirt and debris, hindering heat transfer. Use a soft brush or vacuum cleaner to remove the buildup and restore efficiency.
- Clear Debris from Outdoor Unit: Regularly check the outdoor unit for any leaves, grass, or debris obstructing the airflow. Keep the surrounding area clean and trim vegetation to ensure proper ventilation.
- Check and Clean Condensate Drain: A clogged condensate drain can cause water leakage and affect the performance of your air conditioner. Regularly inspect and clean the drain to prevent any issues.
- Inspect Fan Blades: Check the fan blades for any signs of damage or obstruction. Clean them with a soft cloth to remove dirt, dust, or debris.
- Schedule Professional Tune-Ups: While DIY maintenance is essential, it is also recommended to have your Lennox air conditioner professionally serviced at least once a year. A qualified technician can perform a comprehensive check, clean hard-to-reach areas, and identify any potential problems.
By following these maintenance and cleaning tips, you can ensure that your Lennox air conditioner operates efficiently, providing you with cool comfort throughout the hot summer months. Remember, regular upkeep is key to preserving the performance and longevity of your HVAC system.
Monitoring And Troubleshooting Hvac Systems
Lennox Air Conditioner Reset Button helps in monitoring and troubleshooting HVAC systems by providing a simple solution to reset the system and resolve any issues. Easily accessible, it is an essential tool for maintaining the optimal performance of Lennox air conditioners.
Air conditioners are essential for maintaining a comfortable indoor environment, especially during hot summer months. However, like any other mechanical system, air conditioners can encounter occasional glitches or malfunctions. One of the common troubleshooting techniques is to reset the system by pressing the Lennox air conditioner reset button.
In this section, we will discuss the importance of monitoring the performance of HVAC systems and the signs that may indicate the need for a reset.
Importance Of Monitoring The Performance Of Hvac Systems
Monitoring HVAC systems is crucial for detecting any potential issues early on and ensuring their optimal performance. By regularly monitoring your air conditioner, you can:
- Extend the lifespan of your HVAC system: Regular monitoring allows you to identify and resolve minor issues before they escalate into major problems, ultimately increasing the longevity of your air conditioning unit.
- Improve energy efficiency: Monitoring the performance of your HVAC system helps you identify inefficiencies or inconsistencies that may be causing energy wastage. Addressing these issues can lead to improved energy efficiency, resulting in lower utility bills.
- Identify potential safety hazards: Regular monitoring allows you to detect and address safety concerns such as faulty wiring or refrigerant leaks. Addressing these issues promptly ensures the safety of your household.
- Optimize indoor air quality: Monitoring your HVAC system enables you to identify and address issues that may be affecting indoor air quality, such as dirty filters or ductwork obstructions. Maintaining good indoor air quality is vital for the health and well-being of your family.
Signs To Watch For That May Indicate The Need For A Reset
While there can be various reasons why your air conditioner might need a reset, certain signs indicate that pressing the Lennox air conditioner reset button could resolve the problem. Look out for the following indicators:
- Air conditioner not turning on or responding to commands: If your air conditioner does not respond when you adjust the temperature or turn it on, it may be a sign that a reset is needed to resolve any internal issues.
- Inconsistent or insufficient cooling: If you notice that your air conditioner is not cooling your space as effectively as it used to, or if the cooling is inconsistent, a reset may be necessary to recalibrate the system and restore proper cooling performance.
- Frozen evaporator coil: If you observe ice buildup on the evaporator coil, it could indicate a problem with the system’s airflow or refrigerant levels. A reset might help rectify the issue and prevent further damage to the unit.
- Malfunctioning thermostat: If your thermostat is not displaying the correct temperature or is otherwise unresponsive, a reset can often resolve the problem and restore proper functionality.
Remember that while resetting your Lennox air conditioner may resolve some minor issues, persistent or recurring problems may require professional assistance. Regular monitoring and addressing issues promptly can help prevent major breakdowns and ensure the efficient operation of your HVAC system for years to come.
Seeking Professional Help
When your Lennox air conditioner isn’t functioning properly, seeking professional help is the best way to resolve the issue. A skilled technician can locate and reset the air conditioner’s reset button, ensuring optimal performance.
If you’ve tried resetting your Lennox air conditioner and it still isn’t functioning properly, it might be time to call in a professional HVAC technician. While minor issues can often be resolved with a simple reset, there are instances when seeking professional help is the best course of action.
Here are a few scenarios where it’s advisable to contact an expert:
Instances When It Is Best To Call A Professional Hvac Technician:
- Complex Technical Problems: If you’ve performed a reset and your Lennox air conditioner is still not working or showing error codes, it’s likely a more intricate issue. A professional technician will have the knowledge and tools to diagnose and repair the problem efficiently.
- Frequent Breakdowns: If your air conditioner is repeatedly encountering issues and requiring resets, it’s a sign that there might be an underlying problem. Instead of relying on temporary fixes, it’s best to consult a professional who can identify the cause of the recurring breakdowns and provide a lasting solution.
- Lack of Cooling Efficiency: If you’ve reset your Lennox air conditioner but notice that it’s not providing sufficient cooling or takes an unusually long time to cool your space, it could signal an underlying issue. An HVAC technician will be able to assess the system and determine the cause of the decreased cooling efficiency.
- Strange Noises or Odors: If your air conditioner emits unusual noises like grinding, rattling, or squealing, it could indicate a mechanical fault. Similarly, if there are unpleasant odors, it might be a sign of a mold or electrical problem. In either case, it’s best to have a professional inspect and address the issue promptly.
Benefits Of Professional Maintenance And Repair Services:
- Expertise and Experience: HVAC technicians are trained professionals with in-depth knowledge of air conditioner systems. Their experience allows them to efficiently troubleshoot and repair issues that might be beyond the scope of DIY attempts.
- Proper Diagnosis: Professionals have the necessary tools and diagnostic equipment required to accurately identify the root cause of any problem. This ensures that the right solutions are implemented, leading to longer-lasting repairs.
- Safety Assurance: Handling air conditioner systems involves working with electricity, refrigerants, and other potentially hazardous components. By leaving the repair and maintenance tasks to professionals, you eliminate the risk of personal injury and damage to the equipment.
- Cost-Effective Solutions: While professional services may entail a cost, they often prove to be more cost-effective in the long run. By receiving proper maintenance and repair, your Lennox air conditioner will run more efficiently, minimizing energy consumption and lowering your utility bills.
Remember, it’s important to prioritize the safety and functionality of your Lennox air conditioner. When simple resets won’t suffice, don’t hesitate to reach out to a qualified HVAC technician who can diagnose and resolve any issues effectively, ensuring your air conditioner operates optimally.
Frequently Asked Questions For Lennox Air Conditioner Reset Button
What Is The Purpose Of The Lennox Air Conditioner Reset Button?
The Lennox Air Conditioner reset button is designed to restore the unit to its factory settings, eliminating any previous customizations or errors in the system. It can help resolve technical issues and improve the performance of the air conditioner.
How Do I Locate The Reset Button On My Lennox Air Conditioner?
The reset button on a Lennox Air Conditioner is typically located near the outside unit. It may be labeled as “RESET” or have a small button icon. Refer to your product manual or contact a professional technician if you’re having trouble finding it.
Why Should I Press The Reset Button On My Lennox Air Conditioner?
Pressing the reset button can help troubleshoot common issues with your Lennox Air Conditioner. If you’re experiencing problems like lack of cooling or unusual noises, pressing the reset button can clear out any temporary glitches and help the system function properly.
However, consult the manufacturer or a trained professional before attempting a reset to avoid any further complications.
Conclusion
Overall, the Lennox air conditioner reset button is an essential feature that every Lennox air conditioner owner should be familiar with. Whether you’re experiencing issues with your unit or simply want to keep it running smoothly, knowing how to reset the system can save you time and money.
By following the simple steps outlined in this blog post, you can easily reset your Lennox air conditioner and restore it to its optimal functionality. Remember to always consult the user manual or contact a professional if you encounter any difficulties.
With proper maintenance and regular resetting, you can ensure that your Lennox air conditioner continues to provide you with efficient, cool air during those hot summer months. So, don’t let a malfunctioning air conditioner spoil your comfort. Take advantage of the reset button and keep your Lennox air conditioner running like new.