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Why is your Furnace not kicking on

Your furnace becomes a necessity in the cold and frigid Canadian winters, so what do you do when your furnace not kicking on?

Your furnace not kicking on when it is supposed to can cause for worry and anxiety for everyone in the household, and rightfully so. Nobody wants to be stuck in their home during the middle of winter with a furnace that won’t turn on. This issue presents several problems that could possibly come along with it, like damaged electronics and frozen pipes. Although this issue can be very unexpected and often distressing, there are many possible causes and solutions to put an end to the unpleasant situation:

 Furnace not kicking onDirty Air Filter

A very common reason for your furnace not kicking on is a dirty air filter. Changing an air filter is simple and can take as little as one minute to do. During the winter season it is recommended that you change your furnace’s air filter once a month. Changing your furnace filter is simple and brings on many benefits, such as: better air quality, lower efficiency bills, and of course, a working furnace.

No Power

No matter if your furnace is gas or electric, it still needs power for it to do its job. If your furnace not kicking on it may be because of a broken circuit breaker or as a result of any related wires being torn, corroded, or chewed through by rodents.

Thermostat Problems

Your furnace not kicking on may be a problem rooted in a very simple solution to do with your thermostat. Check your thermostat and make sure that it is set to “heat” instead of “fan” and that it is set to your desired temperature. It is a common mistake for homeowners to forget to change their thermostat settings at the change of the season.

Inadequate Gas Supply

Make sure that the gas valve is turned fully on, not partially on. The gas valve needs to be turned on all the way in order for the furnace to have enough gas to start up the system. The gas valve should only either be all the way on or all the way off.

Pilot Light Not On

Make sure that the blue pilot light underneath the furnace is on. If the blue pilot light is not on then this can be easily fixed by lighting a match.

When should I contact a professional for help?

If the solutions presented above were to no avail and your furnace is still not kicking on, then it may be necessary to contact a local HVAC company for professional service. Some problems that would require require professional service are:

Condensation Problems

Your furnace has a condensation pan which collects excess water. If this pan becomes full with water, the furnace won’t turn on. The reason behind the condensation pan filling up may be because of some blockage in the system or because of a broken/damaged condensation pump. Simply draining the pan will not fix the problem in the long term since it doesn’t provide a solution to the cause of the problem.

Blower Motor Problems

Every furnace has an inspection window, but this window is useless if you don’t know what you should be looking for. If there is a green light flashing then your blower system is working just as it should, but if this light is red or not blinking at all, then you have a problem on your hands. A professional HVAC technician would inspect the system’s control board, motor, transformer and any other furnace parts that may have failed.

There are many other technical issues that could be the root cause of your furnace problems. If you’re in need of assistance with solving these problems, DeMark Home Ontario would be glad to provide you with the help you need.



If you are in need of assistance with a furnace repair or are looking for a replacement in Ontario, DeMark Home Ontario is here at your service. We provide quick and efficient furnace service and replacement performed by our highly experienced and trained technicians. Call us at 647-847-2998 or fill out online request form and we will be happy to assist you with your request.

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