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 common 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 Has a Musty Smell

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

2. Your Heat Pump Smells Fishy/Rotten

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

  • Motor is too hot
  • Wiring problem
  • Plastic components or coating is melting
  • Other mechanical issue

Electrical problems are unsafe, so shut your heat pump system off right away at the breaker box and contact us at 512-355-1482 for heat pump repair.

3. The Heat Pump Has a Rotten Egg Smell

Normally when you smell a rotten egg smell, you’ve got a gas leak. But your heat pump doesn’t run on natural gas. If your heat pump smells like sulfur, a tiny animal may have gotten inside it for warmth and died. One of our Evenaire Heating & Air Conditioning experts can get rid of the smell by cleaning your heat pump.

4. My Heat Pump Smells Like Sewage

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

5. The Heat Pump Smells Like Burning

You might be dealing with an electrical issue if your heat pump smells like burning, burning plastic or burning rubber. This burning smell can be due to melting plastic on electrical wires. Electrical problems in HVAC systems are dangerous and could cause a fire. If you notice this smell, turn off your heat pump at the breaker and contact us at 512-355-1482.

6. Heat Pump Defrost Cycle Smells

Like we mentioned earlier, a dirty socks smell can happen when your evaporator coils need cleaning. You might experience this smell when your heat pump goes into defrost mode.

It’s typical for your heat pump to have to switch on defrost mode during heating season. When the air is much cooler, frost can form rapidly on the coils from condensation and restrict heating. During defrost mode, your heat pump shortly switches to cooling to clear away the frost.

Having a Evenaire Heating & Air Conditioning HVAC technician clean the coils will help get rid of the odor.

You can Count on Us for Your Heat Pump Repair Needs

It can be hard to troubleshoot your heat pump by all by yourself. Your comfort matters to us at Evenaire Heating & Air Conditioning, so you can count on our professionals to assist you when you need us. When you need heat pump repair in Pflugerville that you can count on, call us at 512-355-1482.