How To Reset Your Lennox Thermostat A Step-by-Step Guide

How To Reset Your Lennox Thermostat: A Step-by-Step Guide

Homes usually come with an assortment of pre-installed home appliances and systems in the area. These devices might look simple, but they often come with many features designed to streamline your operation and maintenance as much as possible. In this case, the Lennox thermostat is one such system that helps the owner keep the temperatures in different location of the house at the levels you want while saving energy costs to a minimum.

In most cases, updating your technology is essential to staying comfortable, maintaining the humidity level that you want, and cutting back on spending too much. If you bought a new home or are moving into a new one, it’s time to get acquainted with its utilities – including its thermostat. A Lennox thermostat is calibrated explicitly for use with their heating and cooling equipment. However, if this isn’t the brand that came installed in your home, there are some general tips for resetting any thermostat.

How do I Reset My Lennox Thermostat?

The Lennox thermostat is a smart device that monitors and controls the temperature in your home; therefore, it can be challenging to master. Rather than exhaust yourself trying to figure out how to reset your thermostat, read this article. It will provide you with simple instructions on how to reset the Lennox thermostat.

The Lennox thermostat isn’t operating correctly for several reasons. It might be challenging to pinpoint the cause in certain situations. Nevertheless, resetting it has been effective for years. Here are the steps that will help user:

  • Firstly, power down your HVAC equipment by turning off the Lennox thermostat. 
  • Then, head to your circuit breaker box and turn off the switch. 
  • Wait for around 30 seconds before turning it back on. 
  • Next, turn on your Lennox thermostat. 
  • The thermostat will reboot itself after you turn it on. The home screen will appear after the screen goes blank for 3 seconds or less. 
  • Finally, adjust your heating and cooling settings to your preferences.

Your thermostat may not be functioning correctly, so you may want to reset your furnace working motor. Here is the step for how you can do this:

  • Before you can clean your furnace, you must turn off the power on the circuit breaker. 
  • Then, locate the blower motor wheel and lower the blower compartment lid. 
  • Look for a red or yellow button on the side of the motor and press the arrows down to restart the furnace.

If this doesn’t solve the issue, you can call your trusted technician for assistance so that you know what the issue is and if you need a replacement. They may also help you with anything about the unit and answer most of your questions.

How to Reset Password on Lennox Thermostat

You can secure your house’s temperature by using your Lennox thermostat. External forces can’t compromise you if you have your Lennox thermostat password. It is possible to reset your Lennox thermostat password in a few different ways. You may try this process:

  • To reset your password on your Lennox thermostat, you may use your Lennox thermostat, your mobile app, or the Lennox thermostat website. 
  • You can change your Lennox thermostat account settings on either the Lennox Thermostat or the website under the ‘settings’ menu.
  • Select ‘account’ from this menu to reset your password. 

You’ll see several options when you’re on the account info page. For example, you can click ‘Forgot Password’ under your current password to reset it. You can also reset your password through the Lennox Thermostat mobile app. To reset your Lennox thermostat mobile app password, log out if you haven’t already. Below the username and password section, there is an option to ‘Trouble Logging In?’ Once you’ve entered your email, you can reset your password. 

On the Lennox iComfort website, go to the login page and select the sign in the top corner. Enter your username and password as you would on your mobile app. Choose ‘Trouble Logging In’ and enter your recovery email if you’re having trouble logging in.

How to Unlock Lennox Thermostat

The lock prevents anyone from changing the thermostat temperature on the screen. Once the screen is locked, no one can change the temperature. To unlock the screen, activate it. On the screen, you’ll see a lock icon. Hold and release it after holding it down for five seconds. Your Lennox Thermostat should then appear on the screen. Using the Lennox Thermostat, you can control, monitor, and set up your Lennox iComfort thermostat.

Finding the iComfort thermostat pin is simple. For example, you can locate the pin quickly with a Philips head screwdriver. You can use the feature of iComfort from your web-connected devices, even if you’re far from home. To use your Lebbix iComfort Thermostat, you may need to troubleshoot it from the thermostat screen or your digital device. The simplest way to reset your Lennox thermostat is to take up the Home Screen on the thermostat.

Press the Lennox logo for five seconds, and you will see a message saying ‘qualified Lennox equipment installers only.’ Ignore this and press the reset button, which will turn off the screen after several moments. Your Lennox iComfort Thermostat will then reboot after a few moments.

How to Program Lennox Thermostat

It may be challenging to set up and configure a Lennox thermostat the first time you use it. However, you can do it on your own. When installing your thermostat, you’ll be prompted to follow several steps. After installing your thermostat, it’s time to set the temperature. The thermostat setting can be adjusted using the controls on the home screen. You can use the positive and negative buttons to adjust the temperature, or you can use the nob. To set the desired temperature, press the thermostat button. 

Different modes are available, including heat/cool mode, which shows a red knob for heat and a blue one for cold. ‘Perfect Temp’ mode is also available, displaying one knob to control the overall temperature. You may also configure the ‘Eco’ mode by pressing the leaf-shaped logo on the bottom left corner.

How to Calibrate Lennox Thermostat

Older thermostats require you to remove the front screen and the calibration screw or mercury switch to access the device’s innards. Regular maintenance formerly included this procedure. When smart thermostats came onto the market, they altered this method.

The thermostat pre-calibrates itself from the factory and re-calibrates itself if necessary. You may test your calibration if you believe it is incorrect by placing a thermometer near your thermostat as it runs. If the temperature reads differently, you may run the reset.

How to Reset Thermostats of All Varieties

There are various thermostats, but they all operate on a similar principle. Usually, when the temperature falls below a set point, the thermostat triggers the heating system to come on and back up the temperature. At other times, you might want to turn off the heating system entirely until another time – perhaps in summer – when you want it on again. 

If you have a type of thermostat that you can program, there are ways to reset them so that they re-set themselves to their initial settings and begin operating efficiently. Here are some tips for how you can do this with specific models of thermostats:

1. Programmable Thermostat

A programmable thermostat is a unit of thermostat that you can program to automatically adjust the temperature at different times of the day. It can help save energy and money and ensure the temperature is comfortable for occupants.

You must remove batteries, or a battery flip-flop switched off to reset a programmable thermostat. The following instructions will help you do so: 

  • Turn your thermostat off by switching it to the off position.
  • Open the battery compartment if it’s in the back. If you can’t remove your thermostat from the wall, remove the batteries.
  • Place the batteries backward. Hold them in position for five seconds to reset your thermostat. 
  • Remove the backward batteries and replace them with the correct ones. 
  • After turning on the display, test if this has resolved your HVAC, thermostat, or programming issues.

2. Line Voltage or Low Voltage Electronic Thermostat

To reset a line voltage or low voltage electronic thermostat, you must clean the components and test various configurations. These thermostats typically do not have digital displays and are employed with base board heating or directed wires electric furnaces. The following procedure describes how to reset a thermostat. 

  • Begin by removing the thermostat cover. 
  • Gently brush the inner parts with a soft brush. 
  • Set the thermostat to its coldest temperature. 
  • After the thermostat has been reset to its desired temperature setting, clean the coil once more.

3. Non-Programmable Digital Thermostat

If your non-programmable thermostat is not working correctly, you may need to reset it. You can reset a non-programmable thermostat by removing the battery cover and pressing the reset button for five seconds or by removing the batteries for five seconds and replacing them. You should reset your thermostat after doing one of those two things. 

4. Mechanical Thermostat

The primary troubleshooting for mechanical thermostats begins by removing the cover and ensuring everything is correctly installed and secure. If everything looks right, you may need to reset the circuit breaker. Mechanical thermostats are non-programmable and must be switched on, off, and on manually, whereas you can program non-mechanical thermostats. Because they are not battery-operated, you must reset the circuit breaker to reset them. It is not possible to program these thermostats. 

  • You must switch off the circuit breaker that powers your HVAC system connection, wait 30 seconds, and then switch it back on. 
  • Then turn your thermostat back on.

Why is my Lennox Furnace Blinking Red?

The Lennox furnace has a low flame signal for a reason, which changes to a flashing red light may indicate on the thermostat. You can also find out about the other lights on your thermostat by referring to this page.

  • If you turn the thermostat off, the light will turn off.
  • If the light is flashing yellow, this links to a thermostat that is starting up or has finished booting up and is operational. 
  • If the wi-fi network configuration is in progress, the light flashes yellow. If there is a problem with the furnace, the light flashes red.

How to Turn Off Fan on Lennox Thermostat

From the Lennox Thermostat screen, the Lennox mobile app, or via your internet browser, you can turn off your Lennox fan if it’s oscillating unnecessarily or you simply want to turn it off. From the ‘Fan’ section of the menu on your Lennox Thermostat, select ‘Off’ to turn off your fan.

How Do You Know that it is Time to Reset Your Thermostat?

When you feel stuck in the same room temperature for weeks, you know it is time to reset your thermostat. The air quality might feel stagnant, or you might just feel like you need a change. Maybe your energy bill has been creeping up, or you are constantly adjusting the temperature to find a comfortable middle ground. If these sound familiar, it might be time to take the plunge and reset your thermostat.


Your Lennox thermostat is a smart device that monitors and controls the temperature in your home. As such, it can be a challenging device to master. Rather than exhaust yourself trying to figure out how to reset your thermostat, read this article.

It will provide you with simple instructions on how to reset the Lennox thermostat. Your thermostat may be broken if you cannot maintain your home’s preferred temperature and keep your air conditioner or heater on.


How do you calibrate a Lennox thermostat?

An accurate thermometer taped to the wall next to the thermostat will tell you if your home’s temperature is getting too hot or too cold. Fifteen minutes after turning on the thermostat, check the thermometer to see if it agrees. If the temperature is off by more than 3 degrees, your thermostat may need servicing.

Do I need to reset my thermostat after changing batteries?

If your thermostat is battery-operated, you may need to reset it after changing the batteries. To do this, they simply remove the old batteries and insert new ones. Once the new batteries are in, the thermostat should reset and begin working again.

What are the symptoms of a failing thermostat?

Various symptoms may indicate a failing thermostat. These include the thermostat not turning on, the thermostat not reaching the desired temperature, or the thermostat cycle not working correctly. If you notice any of these issues, it is best to consult with a professional to diagnose and repair the problem.