If you’re noticing a odor from your heat pump, it’s trying to tell you that something is wrong. We’ve developed a list of the top six heat pump smells, what causes them and how you can fix 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. Your Heat Pump Smells Musty

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

2. The Heat Pump Has a Fishy Smell

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

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

Electrical problems are serious, so shut your heat pump system off as soon as possible at the breaker box and contact us at (337) 234-2345 for heat pump repair.

3. Your Heat Pump Smells Like Rotten Eggs

Usually when you are dealing with a rotten egg smell, you have a gas leak. But your heat pump doesn’t utilize natural gas. If your heat pump smells like sulfur, a little animal may have creeped inside it for warmth and died. One of our AC Sales technicians can remove the smell by cleaning your heat pump.

4. The Heat Pump Smells Like a Sewer

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

5. Your Heat Pump Smells Like Burning

You might have an electrical concern 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 problems in HVAC systems are unsafe and could cause a fire. If you notice this smell, turn off your heat pump at the breaker and call us at (337) 234-2345.

6. Heat Pump Defrost Cycle Smells

Like we talked about above, a dirty socks smell can happen when your evaporator coils need sanitizing. You might notice this smell when your heat pump has defrost mode.

It’s ordinary for your heat pump to have to turn on defrost mode during heating season. When the air is much colder, frost can form rapidly on the coils from condensation and impede heating. During defrost mode, your heat pump briefly switches to cooling to remove the frost.

Having a AC Sales HVAC technician clean the coils will help get rid of the smell.

Trust Us with Your Heat Pump Repair Needs

It can be confusing to troubleshoot your heat pump by all by yourself. Your comfort matters to us at AC Sales, so you can count on our specialists to help you when you need us. When you need heat pump repair in Lafayette that you can count on, call us at (337) 234-2345.