Why Your Furnace Has a Strange Smell Published on November 29, 2016 Most residents in Salt Lake City know to call Mountainwest Service Experts Heating & Air Conditioning when their heating system starts making weird noises or leaking water, but did you know that strange smells are another reason to call a service technician? Learn about these heating equipment smells you should never ignore. Rotten Eggs The odor of rotten eggs is very distinct, which is why multiple gas companies add this pronounced odor to their gas to alert homeowners and service techs that there is trouble. If you smell this stench coming from your heating system, shut off your gas appliances immediately as you may have a gas leak. Open your doors and windows so any gas can release outside, and call your heating system service technician as soon as possible and let them know you think you could have a gas leak. Mold or Musty Your HVAC system function together to keep you safe and cozy throughout the year. Since AC systems can cause condensation to collect, moisture can get in your air duct system and cause mold, producing the musty or moldy stench. If you turn on your heating equipment or A/C equipment and smell an odor like this, call Mountainwest Service Experts Heating & Air Conditioning. We’ll come over ASAP to analyze your duct system and conduct an indoor air quality analysis. We can then give you recommendations on how to eliminate the source of the stench and make sure your furnace and AC system is ready to keep you toasty and healthy all winter long. Electrical or Burning There are many things that could be occurring if you smell an electrical or burning stench, all of which should get your attention and should not be disregarded. If you have this odor coming from your furnace, it’s likely something is overheating or may be a signal of wiring problems. Shut off your heating system ASAP and call your furnace expert to provide a thorough diagnosis.