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Three Reasons Why Your Furnace May Begin To Blow Out Air With A Foul Odor

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One of the more unpleasant possible symptoms of a furnace that needs maintenance or repair is foul smelling air exiting the unit.

If your furnace is expelling smelly air, you're obviously going to want to remedy the problem quickly. In the winter time, it's a necessity to have your furnace running. However, a furnace unit works by blowing heated air throughout your home. Any odors in this air will rapidly spread throughout your entire home and make your interior air very unpleasant.

The following are three of the most common causes out there of a furnace unit that's blowing out foul-smelling air:

The unit's air filter is dirty and needs to be changed.

Hopefully, correcting the problem is as simple as changing a dirty air filter. Routinely changing your furnace air filter is important to keeping your furnace functioning effectively and efficiently.

A dirty air filter could not only block air flow, but also cause nasty smells to get into the air that your furnace and duct systems channel around your home. 

The first thing you should do if your furnace begins producing a funny smell is check your air filter. If it appears to be severely soiled, it's likely to be the cause of the problem.

The condensation line is not draining as it should.

If you have a high efficiency furnace, any air that smells unpleasant could be created by an issue with your unit's condensation line.

The condensation line of your unit is meant to remove moisture from the unit that accumulates during normal operation. If this moisture doesn't drain away properly, it can build up and lead to mold and mildew growth that will eventually impact the smell of your unit.

After checking your unit's filter, the next thing you should do to determine the cause of unpleasantly smelling air is inspect your condensation line and look out for any moisture buildup in your unit.

The condensation line hose may need to be replaced or cleaned to fix the problem.

Natural gas is leaking out of the unit because of a malfunction of one of the mechanical components.

A third cause of air that smells unpleasant coming out of your furnace is a natural gas leak. While natural gas itself doesn't smell, most natural gas that you can buy will include an additive that will create a strong rotten egg smell. 

Natural gas suppliers put this additive in so that homeowners know when a gas leak that could potentially create a fire or even explosion hazard is occurring. 

If the air coming out of your furnace smells like rotten eggs, you've probably got a gas leak and you need to fix it right away to keep your home safe. Treat the situation as an emergency and contact a HVAC technician ASAP.

For more furnace care tips this winter, contact a company like Norris Mechanical.