If you’re noticing a smell from your heat pump, it’s trying to tell you that something is wrong. We’ve put together a list of the top 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. My Heat Pump Smells Like Mold

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

2. Your Heat Pump Smells Like Fish

If your heat pump smells like fish, there could be a couple of things wrong:

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

Electrical problems are unsafe, so turn your heat pump system off as soon as possible at the breaker box and get a hold of us at 630-313-2509 for heat pump repair.

3. Your Heat Pump Smells Like Rotten Eggs

Normally when you have 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 gotten inside it for warmth and died. One of our Pure Comfort Heating and Air Conditioning experts can get rid of the smell by cleaning your heat pump.

4. The Heat Pump Smells Like Sewage

As we reviewed before, 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 be dealing with a backed-up or broken sewer line. We advise getting in touch with a company that does sewer line repair.

5. My Heat Pump Smells Burnt

You might have an electrical issue if your heat pump smells like burning, burning plastic or burning rubber. This burning smell can be caused by melting plastic on electrical wires. Electrical issues in HVAC systems are serious and could lead to a fire. If you notice this smell, shut off your heat pump at the breaker and get a hold of us at 630-313-2509.

6. Heat Pump Defrost Cycle Smells

Like we discussed earlier, a dirty socks smell can happen when your evaporator coils need cleaning. You might encounter this smell when your heat pump is in defrost mode.

It’s common 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 interfere with heating. During defrost mode, your heat pump temporarily switches to cooling to get rid of the frost.

Having a Pure Comfort Heating and Air Conditioning HVAC technician clean the coils will help get rid of the odor.

Trust Us with Your Heat Pump Repair Needs

It can be hard to troubleshoot your heat pump by all by yourself. Your comfort matters to us at Pure Comfort Heating and Air Conditioning, so you can count on our professionals to assist you when you need us. When you need heat pump repair in Streamwood that you can depend on, call us at 630-313-2509.