If you’re discovering a smell from your heat pump, it’s attempting to tell you that something is wrong. We’ve put together a list of the most popular six heat pump smells, what causes them and how you can correct them.

  1. Heat pump smells musty
  2. Heat pump smells like fish
  3. Heat pump smells like sulfur
  4. Heat pump smells like sewer
  5. Heat pump smells like burning
  6. Heat pump defrost cycle smells

1. The Heat Pump Has a Musty Smell

If your heat pump smells musty, there’s probably mold growing on damp evaporator coils or in the ductwork. This heat pump odor is often referred to as dirty sock syndrome. You can prevent this by scheduling frequent heat pump maintenance and air duct cleaning.

2. The Heat Pump Smells Like Fish

If your heat pump smells like fish, there could be several things wrong:

  • Overheated motor
  • Wiring problems
  • Plastic components or coating is melting
  • Other mechanical problem

Electrical problems are dangerous, so turn your heat pump system off as soon as possible at the breaker box and contact us at 515-450-8739 for heat pump repair.

3. Your Heat Pump Smells Like Sulfur

Often when you smell a rotten egg smell, you’re dealing with a gas leak. But your heat pump doesn’t use natural gas. If your heat pump smells like sulfur, a tiny animal may have creeped inside it for warmth and died. One of our Haselhoff Air Solutions techs can remove the smell by cleaning your heat pump.

4. Your Heat Pump Smells Like a Sewer

As we mentioned before, your heat pump is electric, so any rotten egg smells are linked to a gas leak in another place. If your heat pump smells like sewer, you might currently have a backed-up or broken sewer line. We advise contacting a company that does sewer line repair.

5. Your Heat Pump Has a Burnt Plastic/Rubber Smell

You might have an electrical problem if your heat pump smells like burning, burning plastic or burning rubber. This burning smell can be the result of melting plastic on electrical wires. Electrical troubles in HVAC systems are serious and could lead to a fire. If you notice this smell, turn off your heat pump at the breaker and call us at 515-450-8739.

6. Heat Pump Defrost Cycle Smells

Like we mentioned above, a dirty socks smell can happen when your evaporator coils need sanitizing. You might experience this smell when your heat pump is in defrost mode.

It’s ordinary for your heat pump to have to turn on defrost mode during heating season. When the air is much cooler, frost can form rapidly on the coils from condensation and interfere with heating. During defrost mode, your heat pump shortly switches to air conditioning to get rid of the frost.

Having a Haselhoff Air Solutions HVAC technician clean the coils will help eliminate the odor.

Depend on for Your Heat Pump Repair Needs

It can be difficult to troubleshoot your heat pump by alone. Your comfort matters to us at Haselhoff Air Solutions, so you can count on our professionals to assist you when you need us. When you need heat pump repair in Ames that you can depend on, call us at 515-450-8739.