When furnace odors occur, it could be a sign there is something seriously wrong with your HVAC unit. If left untreated, the life of the heating and cooling unit could be threatened and you may be left with an expensive repair bill. Familiarizing yourself with what could be causing furnace odors is the first step to identifying a problem.
The Season’s First Start-Up
It’s not uncommon for furnaces to have an unpleasant odor when first starting them up for the season. This smell typically only lasts about an hour, and can be minimized by dusting the grill and changing the air filter before turning the unit on.
If the air filter is clogged or dirty, it will quickly fill your home with a nose-wrinkling odor. Regularly replacing the filter will improve your indoor air quality and reduce furnace odors.
Closing off registers in rooms not currently used is a common way for consumers to save money on their heating and cooling costs. Unfortunately, if you close off more than 20 percent of the registers you can create a buildup of high resistance and heat, which can cause a smoky smell to emit from the furnace.
Homeowners rarely have their ducts cleaned unless they have a preventive maintenance plan. Without annual cleaning, dirt, dust and grime can build up in the ductwork, creating a smelly odor emitting from the registers.
Burners covered in dirt and grime will emit a smoky odor and should be cleaned before turning the furnace on.
Cracked Heat Exchanger
Typically associated with a gas smell, a cracked heat exchanger requires immediate attention from a qualified HVAC technician.
Remember: when in doubt, always contact a trusted HVAC company to examine your furnace. They will be able to identify the specific problem and repair your HVAC unit if needed.
For more information about furnace odors, contact the pros at AirRite Air Conditioning Company, Inc. We have been serving the greater Fort Worth and Arlington area since 1955.
Our goal is to help educate our customers in the Fort Worth and Arlington, Texas area about energy and home comfort issues (specific to HVAC systems). For more information about Furnace Odors and other HVAC topics, download our free Home Comfort Resource guide.
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