If you’re recognizing a smell from your heat pump, it’s trying to tell you that something is wrong. We’ve created a list of the most commonly encountered 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. Your 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 known as dirty sock syndrome. You can avoid this by scheduling frequent heat pump maintenance and air duct cleaning.

2. The Heat Pump Smells Fishy/Rotten

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

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

Electrical problems are dangerous, so shut your heat pump system off right away at the breaker box and contact us at 818-306-3387 for heat pump repair.

3. Your Heat Pump Has a Rotten Egg Smell

Usually when you smell 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 small animal may have creeped inside it for warmth and died. One of our Verona HVAC techs can get rid of the smell by cleaning your heat pump.

4. My Heat Pump Smells Like Sewage

As we reviewed earlier, your heat pump is electric, so any rotten egg smells are tied 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 suggest contacting a company that does sewer line repair.

5. My Heat Pump Smells Burnt

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 caused by melting plastic on electrical wires. Electrical issues in HVAC systems are unsafe and could cause a fire. If you notice this smell, shut off your heat pump at the breaker and contact us at 818-306-3387.

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 ordinary for your heat pump to have to use defrost mode during heating season. When the air is much colder, frost can form rapidly on the coils from condensation and interfere with heating. During defrost mode, your heat pump shortly switches to ac to clear away the frost.

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

You can Count on Us for Your Heat Pump Repair Needs

It can be difficult to troubleshoot your heat pump by all by yourself. Your comfort matters to us at Verona HVAC, so you can count on our experts to help you when you need us. When you need heat pump repair in Santa Clarita that you can count on, call us at 818-306-3387.