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HVAC units in homes are one of the most used appliances. That being said, their inability to function optimally can create great inconvenience and discomfort. One thing that bothers homeowners is the odor that can emanate from their HVAC systems. 

 Common Causes of HVAC Odors

Must, Mildew, or Mold 

An odor like mold or mildew is a widespread ailment of HVAC units. Any excess humidity or moisture in the HVAC unit could lead to mold and mildew flowing in the ductwork. Water leaks and replacement filters should be taken care of as needed to ensure further damage doesn’t occur to the heating and cooling system further. 

Rotten Egg or Gas Odor

If a rotten egg or sulfur smell comes from your HVAC system, there is likely a gas leak. On its own, natural gas is odorless; however, most utility companies add odor to the gas to alert people of any possible leaks. If you do notice gas or a rotten egg-like smell coming from inside your home, make sure to open the windows and leave the house as soon as possible.  

Smoke Odor

Every smoke-like odor does not necessarily have to be a severe concern for homeowners. Smoke can be produced and circulated by cigarettes and cooking. However, if a burning smell persists or smoke is coming out of your HVAC unit, you should be concerned. Overheating the motor, a wiring issue, or some mechanical problem can also be a reason for a smoke odor. You should immediately switch off the HVAC unit from the breaker box and call an expert to fix the issue.

Sewage Smell

The proximity of your HVAC unit to the wastewater lines could cause an odor to enter your home. Contact a plumber to find a solution, and consult your HVAC expert to remove odor from entering your home. 

Solutions for HVAC Odors

An odor problem doesn’t necessarily mean expensive repairs. It could just be a dirty air filter or condensation formed inside the unit and created mold. An HVAC technician can manage most odors.  

Here are a few solutions for HVAC odors

  • Consult an HVAC specialist to repair or replace any part that is not working
  • Schedule annual or bi-annual HVAC maintenance service from certified experts
  • Make sure to regularly change the air filter as prescribed by the system manufacturers
  • Clean your HVAC unit externally and its surroundings