4 Tips on Fixing a Furnace that Won’t Turn On

A furnace is a heating unit that produces proper heat through combustion. It works by heating water or air, and then it circulates the heat throughout your house. You can install it at your home to provide heat, especially during the cold weather.

Common Furnace Issues

The furnace is designed to keep the indoor temperatures at a comfortable level. When the furnace fails, your entire family will encounter some problems, especially during winter. You can fix some of the furnace issues or hire a professional HVAC technician if the issue is complicated. The following are furnace issues that require you to look for HVAC repair services:

Failure to Produce Heat

The principal purpose of a furnace is to keep the interiors warm. When your furnace does not produce heat, it means that it does not fulfill its purpose. The furnace might fail to produce heat due to the fan setting on the thermostat. That way, the furnace might be blowing air right, but the air will not be warm.

The Furnace Keeps Turning On and Off

To keep the temperature, you have set on your thermostat. The furnace will cycle on and off. If your thermostat cycles on and off frequently and does not reach the temperature set, it has some issues. The major problem here is lack of airflow, leading to overheating of the furnace. To solve this issue, you can replace the air filter. If this does not work, calling an HVAC technician will be the best idea.

Failure to Turn on Automatically

The thermostat gives the furnace a signal to switch on. One of the reasons your furnace won’t turn on automatically is the thermostat having a too low temperature. This problem can be solved by regulating the thermostat to the required temperature levels.

The furnace might also fail to turn on automatically if the circuit breaker is off. You can fix this problem by flipping the ‘furnace switch’ on the breaker box. Your furnace might as well fail to turn on if the air filter is clogged or if it does not have fuel.

Failure to Work

The furnace might start a cycle but shut down even before reaching the set room temperature. The furnace might fail to work if the circuit breaker trips, airflow restriction, or pilot light issues. If you are unsure why the furnace stopped working, it is always wise to contact a professional HVAC technician to look into the issue.

Noisy Furnace

Even though the furnace produces some noise while operating, you might notice other louder and unusual noise with your furnace. The furnace might make some noise due to loose connections, or it might be that some fuel was left in the combustion chamber. The ideal way to solve this issue is to look for an HVAC technician.

Leaky Furnace

The condensation pipe can be clogged or develop a leak. In this case, you need to call an HVAC technician to look into the issue.

Possible Reasons Why Furnace Would Not Turn On

It can be inconvenient when you turn your furnace on only for it to fail. You will have to bear the cold and discomfort before fixing the problem. This is why it’s an excellent idea to learn why your furnace might fail to turn on.

The following are reasons why your furnace might fail to turn on:

Faulty Pilot Light

When turning on your furnace, you might hear it click on but not firing up. In that case, the problem is with the ignition sensor.

Dead Thermostat Batteries

Typically, the thermostat sends a signal to the furnace for it to heat. If the thermostat batteries are dead, it will not signal the furnace to heat. That way, the furnace will not turn on when you try switching it.

Clogged Filter

Clogged air filters will impair the airflow in your furnace. A furnace with a clogged air filter will not turn on.

Electricity Failure

Your furnace will not turn on if there is a power outage.

Things to Do If the Furnace Does Not Turn On

Here are some helpful tips you can follow in case your furnace fails to turn on:

Replacing Dead Batteries

 It would be best if you were careful about the low battery notification on your thermostat. That way, you can avoid the issue of your furnace failing to turn on by replacing the dead batteries with new ones.

Cleaning the sensor

 The first step to cleaning the ignitor is switching off the gas to your furnace. You can remove the sensor using a screwdriver. However, it would be best if you were careful not to break the sensor. Return the ignitor to its place and then turn the gas and the furnace on.

Changing the Air Filter

To clear the clogging in the air filter, you should frequently clean the furnace filter. Also, remove the vent registers from any blockages. If this does not help turn your furnace on, you can call a professional to clean the air ducts.

Check the Power System

If your furnace does not turn on due to power issues, you should confirm whether other appliances are working. If you confirm that no other instruments are working, call an electric company to solve the problem. You could also solve the power issue by ensuring that the switches supplying power to the furnace are turned on.

Final Word

Being a vital appliance in your home, the furnace should be kept in working condition all the time. Or else, you will experience many inconveniences and discomfort. When your furnace does not work, the best thing to do is call a professional HVAC service to look into the problem. Smile HVAC is here to solve all your heating and cooling related issues. They are here for you 24 hours.


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Written by Virily Editor

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