How to Reset a Lennox Furnace [Step-by-Step Guide]

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A furnace work to maintain the temperature of your living areas like homes or offices. Lennox is one of the best companies in the USA(Mostly) that provides the best furnaces. If your furnace starts malfunctioning then, resetting it helps. This guide will tell you How to Reset a Lennox Furnace step by step. 

Why do you need to Reset a Lennox furnace?

Dave Lennox founded Lennox international in 1895, and since then, they have invented and manufactured many types of gas, oil, and electric furnaces. Sometimes, a Lennox furnace unit starts overheating or a similar malfunction. In this situation, resetting it can help.

Let’s talk about the steps which should be done to reset your Lennox furnace and take back it to normal.

Steps to Reset a Lennox Furnace

How to Reset a Lennox Furnace

Some very simple steps can be performed to do this. And the best thing is that a non-technical guy can also do these steps. So, let’s start without taking much time of yours.

First Step

The first step is to turn off all electrical supplies to the furnace. This will prevent you from an electrical injury or risk. Next, go to the circuit breaker switch, which is labeled by ‘Furnace’ or ‘Heating system’, and now, flip this switch into ‘Off’. Now, move to the second step.

Second Step

Now, come to your furnace’s control panel. If your furnace is of downflow model then, the panel could be located on the bottom, and if it is of upflow model then, the panel could be located on the top. Now, lift the panel up and away from the appliance once you find it. Next, move to the third step.

Third Step

As a third step, examine the furnace’s outer components and look for a raised button, which is the Limit control switch. Additionally, you can switch to the right of the ignition control box. 

Fourth Step

Now, when you find the Limit control switch, press and release this. This will reset your Lennox furnace.

Final Step

Attach all the electrical wires or switch ON the electricity back and return to the electrical panel. Now, switch the ‘Furnace’ or ‘Heating System’ to the ON position. That’s all.

Final Words

These were the step-by-step process to reset the Lennox furnace. Hopefully, you have done all the steps without any issue, and now, your furnace has started working as normal. If not then, it is possible that your furnace is undergoing another issue that can’t be resolved by resetting it.

People Also Ask

Does a Lennox furnace have a reset button?

The straight answer is no, a Lennox furnace does not have a specific button to reset it but, you can perform a reset by looking for a raised button or switching to the right of the ignition control box and then pressing and releasing the limit control switch.

Why is my Lennox furnace not working?

A Lennox furnace may stop working due to many causes. Here is the list of causes:

  • There is no gas supply.
  • The air filter is dirty.
  • The ignition source has gone bad.
  • An open high-limit switch.
  • A faulty thermostat.
  • An issue with the draft motor.

What does a red blinking light on my Lennox furnace mean?

A red blinking light on the Lennox furnace means that the furnace heater might have low voltage or a short circuit.

How do I reset my Lennox air handler?

  • Shut Down Your AC and the Thermostat.
  • Find Your Circuit Breaker Box.
  • Now, reset the Circuit Breaker for Your AC Unit.
  • After this, wait 30 seconds.
  • Now, turn the AC Thermostat Back On.

Read next:

Lennox Error Code 292

Fix Lennox Error Code 413

Lennox iComfort App Not Working

Lennox Error Code 276

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