Why Is Your Furnace Not Working?

As a homeowner, you are likely to experience a situation where your furnace does not come on. This means your house is cold and there is nothing you can do about it. You should call a furnace repair service the moment you realize that your furnace is malfunctioning. The following are reasons your home heating system isn't working and needs professional care. 

Circuit Breakers

One of the primary reasons your furnace does not come on is the circuit breaker. If the circuit breaker that provides power to the furnace is tripped, the furnace will not work. This also applies to a furnace system running on gas or propane.

Your furnace repair expert will start their troubleshooting by inspecting the circuit that powers the furnace. They will check whether the circuits are in the "ON" position. If the circuit breaker is on and the furnace does not turn on, this is an electrical problem.


The thermostat of your furnace should be set to heat. If the thermostat settings are correct, but it is colder than the temperature set on the thermostat, then you have a bigger problem. The technician may look at the fan switch to ensure it is on. If the problem persists, the technician will look at the programmable thermostat to check for an error code. The new thermostat model shows an error code if there is a problem. The display will tell the technician what the problem is.

Too Much Gas

The amount of gas a furnace should burn will vary depending on the model. You need to calibrate the system during installation to ensure it functions properly. The wrong calibration will cause your furnace to stop working. This is because a wrongly calibrated furnace uses too much gas. Over time, you will pay more for gas. Additionally, the furnace starts to overheat and begins to run on a limit switch.

Dirty Air Filters

Clogged filters can negatively impact your furnace. Dirty filters cause short cycling, and this prevents the furnace from keeping your home warm. Furthermore, if your furnace air filter is clogged, the fan will require more power to circulate air. This will increase your heating bills.

Dirty air filters also cause your furnace to stop working. The dirty filters will damage the internal components of your furnace. If you cannot turn on the furnace, the filters have probably damaged the pilot light, fan, heat exchanger, gas valves, and pressure switches. To prevent expensive furnace repair jobs, you should change air filters regularly to ensure they are clean.