Why Your Furnace Has a Strange Smell Published on November 29, 2016 Most residents in Provo know to call Service Experts Heating & Air Conditioning when their furnace starts making strange noises or leaking water, but did you know that strange smells are another cause to call an expert? Check out these furnace smells you should never ignore. Rotten Eggs The smell of rotten eggs is very recognizable, which is why multiple gas companies add this distinct odor to their gas to warn homeowners and technicians that there is an issue. If you smell this stench coming from your heating equipment, power off your gas appliances right away as you might have a gas leak. Open the doors and windows so any gas can vent outside, and call your heating system service technician as soon as possible and tell them you think you could have a gas leak. Mold or Musty Your heating and cooling equipment operate together to keep you safe and cozy throughout the year. Since air conditioning systems can cause condensation to accumulate, moisture can manifest in your air duct system and create mold, producing the musty or moldy smell. If you turn on your furnace or AC system and smell an odor like this, call Service Experts Heating & Air Conditioning. We’ll come over ASAP to inspect your duct system and do an indoor air quality analysis. We can then give you recommendations on how to remove the source of the odor and make sure your furnace and AC system is ready to keep you comfortable and healthy all winter long. Electrical or Burning There are multiple 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 an indication of wiring problems. Shut down your furnace ASAP and call your furnace professional to provide a thorough diagnosis.