The most common reason for a residential heat pump to fail is a malfunction or failure of the electrical capacitor, which provides the critical surge of power required to start and run the compressor and outdoor fan motors. Capacitors are sensitive electronic components that degrade over time due to exposure to outdoor summer heat, electrical voltage spikes, and continuous cycling. When a run or start capacitor fails, the compressor or outdoor fan will either hum loudly without spinning or fail to engage entirely, leaving your home without heating or cooling. Other frequent causes of heat pump failure include dirty outdoor coils, low refrigerant levels from leaks, and frozen coils during winter operation. You can verify capacitor failure by inspecting for a bulging casing or testing with a multimeter.
1 votes
Marked as accepted