If you’re discovering a smell from your heat pump, it’s trying to tell you that something is up. We’ve put together a list of the most common six heat pump smells, what causes them and how you can fix them.
- Heat pump smells musty
- Heat pump smells like fish
- Heat pump smells like sulfur
- Heat pump smells like sewer
- Heat pump smells like burning
- Heat pump defrost cycle smells
1. Heat Pump Smells Musty
If your heat pump smells musty, there’s most likely mold growing on moist 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. Heat Pump Smells Like Fish
If your heat pump smells like fish, there could be several things wrong:
- Motor is too hot
- Wiring problem
- Plastic components or coating is melting
- Other mechanical problem
Electrical problems are unsafe, so turn your heat pump system off immediately at the breaker box and call us at for heat pump repair.
3. Heat Pump Smells Like Sulfur
Usually when you smell 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 small animal may have creeped inside it for warmth and died. One of our Willco Air Conditioning, Refrigeration & Heating Inc. experts can eliminate the smell by cleaning your heat pump.
4. Heat Pump Smells Like Sewer
As we reviewed before, your heat pump is electric, so any rotten egg smells are connected to a gas leak elsewhere. If your heat pump smells like sewer, you might be dealing with a backed-up or broken sewer line. We recommend calling a company that does sewer line repair.
5. Heat Pump Smells Like Burning
You might have an electrical concern 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 lead to a fire. If you notice this smell, shut off your heat pump at the breaker and get a hold of us at .
6. Heat Pump Defrost Cycle Smells
Like we mentioned earlier, a dirty socks smell can happen when your evaporator coils need to be cleaned. You might notice this smell when your heat pump has defrost mode.
It’s typical for your heat pump to have to turn on defrost mode during heating season. When the air is much cooler, frost can form fast on the coils from condensation and restrict heating. During defrost mode, your heat pump shortly switches to air conditioning to get rid of the frost.
Having a Willco Air Conditioning, Refrigeration & Heating Inc. HVAC technician clean the coils will help get rid of the smell.
Trust Us with Your Heat Pump Repair Needs
It can be hard to troubleshoot your heat pump by alone. Your comfort matters to us at Willco Air Conditioning, Refrigeration & Heating Inc., so you can count on our professionals to support you when you need us. When you need heat pump repair in that you can rely on, call us at .