An early indicator that a heating system needs professional repair is when strange, unpleasant odors start to come from the vents. There are a few common smells that occur when certain elements on a furnace begin to go; they are rotten eggs, burning wires, and mold or mildew. These odors don’t always mean there is a serious issue, but it is reason to “Call the Experts” here at West Allis Heating.

Rotten Eggs

The smell of rotten eggs come from an additive that is put into natural gas so it is easier to detect a leak. If you notice the smell of rotten eggs coming from your vents or furnace, shut the furnace down and, open the doors and windows. Be sure to call for a technician if this occurs.

Burning Wires

The smell of burning wires or burning plastic could mean the motor or other components within the furnace are overheating. It is important to call a technician and address the situation quickly, since other parts of the furnace could be affected.

Mold or Mildew

A musty mold or mildew odor could mean the furnace filter needs to be changed. If you change the filter and still notice a smell it could mean that the heat pump, or other critical parts of the unit has mold emerging inside. This would require a professional’s attention.

Do not be concerned about odors that occur after a new furnace installation. This smell is generally adhesive used during the installation and will fade. Also, do not be alarmed if you notice a burning dust smell when you first turn your furnace on for the season. This is common for many homes.  If the smell persists for a few days call for a technician.

West Allis Heating and Air Conditioning can help with any HVAC related odor. If you need assistance from a technician reach out to our office at (414)543-2800 to schedule. If you need a filter, stop by our comfort store to purchase one over the counter.