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Troubleshoot

Lennox Air Conditioner Reset Button – How it Works?

ByRalph P. Sita Updated onJanuary 20, 2025

To resolve issues with your Lennox air conditioner, resetting the unit is often a quick and effective solution. Begin by locating the reset button, which is typically found on the control panel of the unit. Once you’ve identified it, press and hold the button for about five seconds. Release the button, and wait for the unit to restart. This simple reset process should resolve most minor malfunctions. However, if the air conditioner continues to malfunction after the reset, it’s advisable to contact a qualified technician for further diagnosis and assistance.

Lennox Air Conditioner Reset Button

Page Contents

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  • Where is the Reset Button on a Lennox Air Conditioner?
  • Lennox air conditioner not turning on – what should I do?
  • Lennox air conditioner troubleshooting guide
  • What Does the Lennox Air Conditioner Reset Button Do?
  • How do I reset my Lennox air conditioner?
  • How to reset Lennox air conditioner remote?
  • How Do I Reset My Outside Lennox Air Conditioner?
  • Lennox Air Conditioner Solid Red Light
  • Lennox Air Conditioner Flashing Light
  • Lennox Air Conditioner Not Cooling
  • ✅ Lennox iComfort ● Clear Error Code 413 ● How to Reset Your HVAC Air Conditioner Heater
  • Lennox ac pressure switch reset
  • Does Lennox Furnace Have a Reset Button?
  • How to Reset Lennox Thermostat?
  • Next Steps
    • Related Articles

Where is the Reset Button on a Lennox Air Conditioner?

The most common place is on the control panel, but it could also be near the compressor or on the back of the unit.

If you’re having trouble finding it, consult your owner’s manual or contact a Lennox dealer for help.

Lennox air conditioner not turning on – what should I do?

If your Lennox air conditioner is not turning on, there are a few possible reasons why.

Here are a few steps you can try to troubleshoot the problem:

  • Check to ensure the thermostat is set to “cool” and the temperature is set lower than the current room temperature.
  • Ensure the air conditioner’s power switch is turned on, and check the circuit breaker or fuse box to ensure the unit receives power.
  • Check the air filter and clean or replace it if it is dirty. A dirty air filter can block air flow, preventing the air conditioner from turning on.
  • Check the outdoor unit to ensure that it is properly connected to the indoor unit and that no obstructions are blocking the airflow.

Lennox air conditioner troubleshooting guide

In general, you can follow a few steps to troubleshoot your air conditioner if it is not working properly.

  • Make sure the air conditioner is turned on and that the thermostat is set to a temperature lower than the current room temperature.
  • Now check the circuit breaker or fuse box to ensure the air conditioner receives power.
  • Appraisal the air filter and clean or replace it if it is dirty.
  • Check the outdoor unit to ensure it is free of debris and that the fan is turning.

What Does the Lennox Air Conditioner Reset Button Do?

If your Lennox air conditioner isn’t working properly, you may need to reset the unit. To do this, locate the reset button on the control panel.
Once you’ve found it, press and hold the button for three seconds. This will reset the unit and hopefully fix any issues you were having.

How do I reset my Lennox air conditioner?

To reset your Lennox air conditioner, you will need to locate the reset button on the air conditioner itself.
This button is usually located on the control panel of the air conditioner and is often marked with the word “Reset” or a symbol that looks like a circular arrow.
Press and hold the reset button for about five seconds, or until the display on the air conditioner shows the default settings.
This will reset the air conditioner to its factory settings and should allow you to use it again.

How to reset Lennox air conditioner remote?

To reset a Lennox air conditioner remote, you will need to locate the reset button on the remote control.
This button is usually marked with the word “Reset” or a symbol that looks like a circular arrow. Press and hold the reset button for about five seconds or until the display on the remote control shows the default settings.
This will reset the remote to its factory settings and should allow you to use it again.

How Do I Reset My Outside Lennox Air Conditioner?

How Do I Reset My Outside Lennox Air Conditioner

If your Lennox air conditioner isn’t working properly, you may need to reset it. Here’s how to do so:

1. Locate the reset button on your air conditioner. This is usually located near the bottom of the unit.

2. Press and hold the reset button for at least five seconds.

3. Release the reset button and wait for the air conditioner to restart. It may take a few minutes for the unit to reset itself completely.

4. If your air conditioner still isn’t working properly after reset, you may need to contact a professional for further assistance.

Lennox Air Conditioner Solid Red Light

If you have a Lennox air conditioner, you may have noticed that the solid red light is occasionally on.

This is normal and indicates that the unit is in standby mode. The red light will go off when the AC unit is turned on and will come back on when it’s turned off.

If the red light stays on constantly, it could indicate a problem with the unit and you should contact a service technician for further diagnosis.

Lennox Air Conditioner Flashing Light

Lennox Air Conditioner Flashing Light

If you have a Lennox air conditioner, you may have noticed that the unit has a flashing light. This is normal and indicates that the unit is in standby mode.

The light will flash when the unit is first turned on, and then it will stay on continuously until the unit reaches the set temperature.

At that point, the unit will cycle off and the light will turn off.

Lennox Air Conditioner Not Cooling

If your Lennox air conditioner isn’t cooling, there could be a few different reasons why. First, check to make sure that the unit is turned on and set to the correct setting.

If it is, then you’ll want to check the thermostat to see if it’s set correctly.

If none of those things seem to be the issue, then it’s possible that there’s something wrong with the unit itself. In that case, you’ll need to contact a professional for help.

✅ Lennox iComfort ● Clear Error Code 413 ● How to Reset Your HVAC Air Conditioner Heater

Lennox ac pressure switch reset

The pressure switch on a Lennox air conditioner is a safety device that is designed to prevent the air conditioner from operating if the pressure in the refrigerant system is too high or too low.

If the pressure switch trips, it will prevent the air conditioner from turning on, and the air conditioner will display an error code indicating that the pressure switch has tripped.

To reset the pressure switch on a Lennox air conditioner, you will need to locate the reset button on the pressure switch.

This button is usually marked with the word “Reset” or a symbol that looks like a circular arrow.

Press and hold the reset button for about five seconds or until the display on the air conditioner shows the default settings.

This will reset the pressure switch and should allow the air conditioner to operate again.

Does Lennox Furnace Have a Reset Button?

Does Lennox Furnace Have a Reset Button

If your Lennox furnace isn’t working, you can try resetting it. Locate the “Reset” button on the control panel to do this.

It’s usually red and located near the bottom of the panel.

Once you’ve found it, press and hold the button for about three seconds. This should reset your furnace and get it up and running again.

How to Reset Lennox Thermostat?

If you need to reset your Lennox thermostat, there are a few steps you’ll need to follow. First, locate the reset button on your thermostat. This is usually located near the batteries.

Once you’ve found the reset button, press and hold it for about 5 seconds. After a few moments, your thermostat should be reset and ready to use!

Next Steps

If your Lennox air conditioner isn’t working properly, you may need to reset the unit. To do this, locate the reset button on the control panel and press it.

If the unit still doesn’t work, you may need to contact a professional for assistance.

5/5 - (2 votes)
Ralph P. Sita
Author: Ralph P. Sita

Ralph P. Sita is a seasoned professional with deep roots in both the HVAC and tech industries. His family’s business, Ralph P. Sita, Inc., is a locally owned and operated HVAC contractor with over 42 years of experience, serving the DC, Maryland, and Virginia areas. The company specializes in residential, commercial, and industrial heating, ventilation, and air conditioning services, offering everything from installation and maintenance to custom ductwork and indoor air quality solutions -www.ralphpsita.com. A former CPA, he spent the last decade as co-founder and co-CEO at Cybrary, a leading platform for cybersecurity and IT training. Cybrary became the largest, most well-known cybersecurity training businesses in the industry under his leadership. Smart AC Solutions is an opportunity to give back to the HVAC community by providing reliable, actionable information on all things heating and cooling.

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Ralph P. Sita

Ralph P. Sita is a seasoned professional with deep roots in both the HVAC and tech industries. His family’s business, Ralph P. Sita, Inc., is a locally owned and operated HVAC contractor with over 42 years of experience, serving the DC, Maryland, and Virginia areas. The company specializes in residential, commercial, and industrial heating, ventilation, and air conditioning services, offering everything from installation and maintenance to custom ductwork and indoor air quality solutions -www.ralphpsita.com.

A former CPA, he spent the last decade as co-founder and co-CEO at Cybrary, a leading platform for cybersecurity and IT training. Cybrary became the largest, most well-known cybersecurity training businesses in the industry under his leadership.

Smart AC Solutions is an opportunity to give back to the HVAC community by providing reliable, actionable information on all things heating and cooling.

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