If you’re noticing a smell from your heat pump, it’s attempting to tell you that something is wrong. We’ve developed a list of the most popular 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. The Heat Pump Has a Musty Smell

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

2. My Heat Pump Smells Fishy/Rotten

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

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

Electrical problems are dangerous, so shut your heat pump system off as soon as possible at the breaker box and contact us at 956-630-3522 for heat pump repair.

3. Your Heat Pump Has a Rotten Egg Smell

Normally when you have 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 little animal may have creeped inside it for warmth and died. One of our Cytech Heating & Cooling L.C. techs can get rid of the smell by cleaning your heat pump.

4. My Heat Pump Smells Like a Sewer

As we reviewed above, your heat pump is electric, so any rotten egg smells are tied to a gas leak somewhere else. If your heat pump smells like sewer, you might currently have a backed-up or broken sewer line. We suggest getting in touch with a company that does sewer line repair.

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

You might have an electrical issue 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 dangerous 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 956-630-3522.

6. Heat Pump Defrost Cycle Smells

Like we talked about above, a dirty socks smell can happen when your evaporator coils need to be cleaned. You might encounter this smell when your heat pump is in defrost mode.

It’s common for your heat pump to have to turn on defrost mode during heating season. When the air is much colder, frost can form quickly on the coils from condensation and impede heating. During defrost mode, your heat pump shortly switches to ac to clear away the frost.

Having a Cytech Heating & Cooling L.C. HVAC technician clean the coils will help eliminate the smell.

Trust Us with Your Heat Pump Repair Needs

It can be difficult to troubleshoot your heat pump by all by yourself. Your comfort matters to us at Cytech Heating & Cooling L.C., so you can count on our experts to assist you when you need us. When you need heat pump repair in Rio Grande Valley that you can count on, call us at 956-630-3522.