What Causes the Burning Smell When I Turn on My Furnace?

You might be the sort to turn on the heat as soon as there's a chill in the air. Alternatively, you may wait for the first, all-out brutal cold spell. In any case, don't be alarmed if your furnace emits an unusual odour the first time you switch it on for the heating season. It's possible that this is typical. Here are some scents that could be coming from your furnace, what they are, and what you should do about them, if anything.


Dust and dirt particles can settle within the furnace and on internal components when it is not actively heating. The dust burns off when you turn on the furnace, leaving a light burning odour that should disperse fast. If the problem persists for more than an hour, check the air filter and replace it if necessary, or call Boss Mechanical Inc to have the system inspected.


To find the source, follow your nose. It could be an overheated motor, a damaged bearing, or a wiring issue if it's coming from your furnace, and it's time to call Boss Mechanical Inc. It could be a plastic toy or other foreign object in the duct if it's coming from a certain register/vent. If you don't see an object in the duct, it's better to call an experienced HVAC technician or duct specialist.


It's possible that your air filter is too unclean, or that you have mould or bacterial accumulation in your home. If necessary, inspect and replace the filter. Organic growth on the cooling (evaporator) coil or in your ductwork could also be a source.


If you smell rotten eggs or sulphur in your home while using gas appliances, get out of there and notify the gas company right away. Gas leaks are dangerous and should be handled by skilled personnel at all times.


For more information on Air Conditioner Repair in North York please call @ (+1) 437-777-4555.

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