9 Reasons Your Furnace or Heat Pump Keeps Blowing Its Fuse

  • Excessive Dirt and Dust. …
  • Overvoltage. …
  • Electrical Shorts. …
  • Loose Wires. …
  • Low Airflow. …
  • Failing Valves. …
  • Water Leaks. …
  • Cold Weather.

What would cause a furnace to keep blowing fuses?

Short Circuits, Wiring
One likely culprit for a furnace blowing a lot of fuses is because of damaged wiring, or because of a short circuit. When the wires are insecure or connected poorly, it will make your furnace short circuit. If you check the wiring in your home to see if this is the reason, remember safety first.

Why does my central air keep blowing fuses?

Low refrigerant.
Another cause of blown AC fuses could be a low refrigerant level. Without the proper amount of refrigerant, your AC has to work harder to maintain its performance. Much like having a dirty air filter, this could cause your air conditioner to blow a fuse simply from overworking.