If you’re recognizing a odor from your heat pump, it’s trying to tell you that something is wrong. We’ve developed a list of the most commonly encountered 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. Your Heat Pump Has a Musty Smell

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

2. The Heat Pump Smells Like Fish

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

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

Electrical problems are serious, so turn your heat pump system off as soon as possible at the breaker box and get a hold of us at 570-648-0748 for heat pump repair.

3. My Heat Pump Smells Like Sulfur

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 LTS Plumbing & Heating Inc. experts can get rid of the smell by cleaning your heat pump.

4. The Heat Pump Smells Like a Sewer

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

5. The 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 the result of melting plastic on electrical wires. Electrical troubles in HVAC systems are dangerous and could cause a fire. If you notice this smell, shut off your heat pump at the breaker and contact us at 570-648-0748.

6. Why Your Heat Pump Defrost Cycle Smells

Like we talked about earlier, a dirty socks smell can happen when your evaporator coils need sanitizing. You might encounter this smell when your heat pump goes into defrost mode.

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

Having a LTS Plumbing & Heating Inc. HVAC technician clean the coils will help eliminate the odor.

Trust Us with Your Heat Pump Repair Needs

It can be difficult to troubleshoot your heat pump by yourself. Your comfort matters to us at LTS Plumbing & Heating Inc., so you can count on our experts to assist you when you need us. When you need heat pump repair in Shamokin and Sunbury that you can depend on, call us at 570-648-0748.