5 Common Causes of Furnace Failure You Should Be Aware of

Gas Furnace Maintenance

Furnace failure is a common problem faced by homeowners. The furnace is an integral part of the home’s heating system, and its failure can lead to a range of issues, including lack of heat, higher energy bills, and the potential for health and safety risks. When winter comes around, it’s always a good idea to be sure your furnace is in working order so that you won’t be stuck without heat. 

Doing a maintenance check on your furnace before the chill sets in is the best way to avoid any potential issues or breakdowns. If you have a problem with your furnace, look at the possible causes to quickly remedy the problem if needed.

1) Malfunctioning Blower Motor

If the furnace is not producing warm air, it could be due to a malfunctioning blower motor. The blower motor is responsible for pushing the heat created by the furnace through the vents in your house. If it is not working, the furnace will not be able to circulate the heat, which means you won’t be able to feel any warmth. 

To determine if the blower motor is the cause of the problem, check to see if it is functioning properly. If it is, then the furnace may still be working but just not blowing out the warm air.

2) Blocked Ventilation

Another cause of a furnace not producing warm air could be blocked ventilation. If the vents are blocked or clogged, the warm air will not be able to circulate properly through the house. Check to see if the vents are clear and free from any debris that may be blocking the flow of air.

Vent cleaning is a necessary part of keeping a home well-maintained. By having your vents cleaned, you can ensure that the air quality in your home is good, that your furnace is running efficiently, and that your energy bills are kept low.

3) Faulty Thermostat

The thermostat is the device that tells the furnace when to turn on and off. If it is not working properly, the furnace may not produce warm air. If the thermostat is not calibrated properly, it can cause the furnace to turn off prematurely or not turn on at all. 

4) Malfunctioning Ignition

If the ignition on the furnace is malfunctioning, it can prevent the furnace from turning on at all. This can be caused by various issues, including a clogged pilot light, a faulty spark, or a bad control board. If the ignition is not functioning properly, it is important to be serviced immediately to prevent further damage.

To see if your furnace’s pilot light has gone out, open the burner chamber door and look for the pilot light tube. If there is no small flame present, then the pilot light is not working and the furnace cannot operate.

5) Lack of Maintenance

If your furnace has not been serviced regularly, it is likely that it is not running as efficiently as it should be. A lack of maintenance can cause the furnace to overwork, leading to higher energy bills and more frequent repairs.


If your furnace is not working properly, it could be due to several issues. Check the thermostat, power supply, filters, pilot light, and maintenance status to determine the cause of the problem. Once you have identified the issue, you can contact a professional for assistance.

Daikin Dealers Toronto can save you a lot of resources in the long run. We offer Daikin furnace repair in Toronto to ensure your system will keep you warm throughout the year. Get in touch with us today to learn how.

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