If you’re discovering a odor from your heat pump, it’s trying to tell you that something is wrong. We’ve developed a list of the most common 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 Smells Musty

If your heat pump smells musty, there’s likely mold growing on moist evaporator coils or in the ductwork. This heat pump odor is often referred to as dirty sock syndrome. You can avoid this by scheduling regular heat pump maintenance and air duct cleaning.

2. The Heat Pump Has a Fishy Smell

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

  • Overheated motor
  • Wiring issue
  • 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 940-202-1184 for heat pump repair.

3. The Heat Pump Smells Like Sulfur

Usually when you are dealing with a rotten egg smell, you’re dealing with a gas leak. But your heat pump doesn’t use natural gas. If your heat pump smells like sulfur, a tiny animal may have crawled inside it for warmth and died. One of our Pepper AC & Heat experts can eliminate the smell by cleaning your heat pump.

4. My Heat Pump Has a Sewage Smell

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 be dealing with a backed-up or broken sewer line. We suggest contacting a company that does sewer line repair.

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

You might have an electrical problem 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 unsafe and could result in a fire. If you notice this smell, turn off your heat pump at the breaker and get a hold of us at 940-202-1184.

6. Heat Pump Defrost Cycle Smells

Like we discussed previously, a dirty socks smell can happen when your evaporator coils need to be cleaned. You might experience this smell when your heat pump is in 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 quickly on the coils from condensation and impede heating. During defrost mode, your heat pump briefly switches to cooling to remove the frost.

Having a Pepper AC & Heat 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 all by yourself. Your comfort matters to us at Pepper AC & Heat, so you can count on our professionals to support you when you need us. When you need heat pump repair in Justin that you can rely on, call us at 940-202-1184.