If you’re noticing a odor from your heat pump, it’s trying to tell you that something is up. We’ve put together a list of the most popular six heat pump smells, what causes them and how you can repair 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. My 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 known as dirty sock syndrome. You can prevent 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 a couple of things wrong:

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

Electrical problems are unsafe, so turn your heat pump system off as soon as possible at the breaker box and call us at 509-284-4265 for heat pump repair.

3. My Heat Pump Has a Rotten Egg Smell

Normally when you are dealing with a rotten egg smell, you’re dealing with a gas leak. But your heat pump doesn’t utilize natural gas. If your heat pump smells like sulfur, a tiny animal may have creeped inside it for warmth and died. One of our Lakeside Heating & Air technicians can eliminate the smell by cleaning your heat pump.

4. The Heat Pump Smells Like Sewage

As we discussed earlier, your heat pump is electric, so any rotten egg smells are connected to a gas leak in another place. If your heat pump smells like sewer, you might have a backed-up or broken sewer line. We recommend getting in touch with a company that does sewer line repair.

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

You might be dealing with an electrical problem 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 unsafe and could lead to a fire. If you notice this smell, turn off your heat pump at the breaker and get a hold of us at 509-284-4265.

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 experience this smell when your heat pump is in defrost mode.

It’s typical for your heat pump to have to use 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 Lakeside Heating & Air HVAC technician clean the coils will help get rid of the smell.

Depend on for Your Heat Pump Repair Needs

It can be confusing to troubleshoot your heat pump by yourself. Your comfort matters to us at Lakeside Heating & Air, so you can count on our experts to assist you when you need us. When you need heat pump repair in Chelan and Wenatchee that you can count on, call us at 509-284-4265.