Heat pump repair in Pennsylvania

A heat pump moves heat rather than making it, running an air conditioner in reverse to bring outdoor heat inside. That is why it is efficient, and why its behaviour in cold weather confuses people who are used to a furnace.

Normal behaviour that is not a fault

Worth knowing before you call, though we are happy to reassure you on the phone:

• The air from the vents feels cooler than a furnace. A heat pump delivers a larger volume of mildly warm air rather than short blasts of hot air. Around body temperature at the register is normal, and it can feel draughty even while the house is heating properly.
• The outdoor unit steams and runs longer cycles. Both expected.
• It periodically stops heating and the outdoor fan cuts out. That is the defrost cycle melting frost off the outdoor coil. It lasts a few minutes and you may see steam. Normal, and necessary.
• Some frost on the outdoor coil in cold damp weather. Normal between defrost cycles.

Symptoms that are faults

The outdoor unit is encased in ice

Light frost clears itself. A solid block of ice over the coil, or ice built up around the base and fan, means the defrost cycle is not working. The cause is usually the defrost control board, the defrost thermostat or sensor, the reversing valve failing to switch, or a refrigerant charge problem. Left alone, ice restricts airflow until the system cannot heat at all, and it can damage the fan.

Auxiliary or emergency heat is running all the time

Almost every Pennsylvania heat pump has backup heat — usually electric resistance strips, sometimes a gas furnace in a dual-fuel setup. It is designed to assist in genuinely cold weather. If your thermostat shows auxiliary heat on mild days, or your electricity bill has jumped, the heat pump is not carrying its share. That points at low refrigerant charge, a failed outdoor fan or compressor, a stuck reversing valve, or a thermostat configured wrongly after a replacement.

No heat, outdoor unit silent

Contactor, capacitor, control board, defrost board, or a tripped breaker. The run capacitor is one of the most frequent failures on any outdoor unit and is a routine part to replace.

It cools fine but will not heat, or the reverse

That pattern points squarely at the reversing valve or its solenoid, the component that decides which direction heat moves.

Cold weather, honestly

Older single-stage heat pumps lose capacity as the outdoor temperature falls and hand over to backup heat somewhere around freezing. Modern variable-speed cold-climate units hold useful capacity far lower, and are a genuinely different proposition from a heat pump installed twenty years ago. If your system is older and leaning on resistance heat for most of the winter, that is worth a conversation about what a current unit would do instead — but it is also worth ruling out a simple fault first, because low charge produces exactly the same symptom.

Refrigerant is not a consumable

A sealed system does not use up refrigerant. If a unit is low, it is leaking, and simply adding more without finding the leak means paying for the same repair again next season. We locate leaks and talk to you about whether repair or replacement makes more sense, which also depends on which refrigerant the system uses — equipment is transitioning away from R-410A, and that affects what servicing an older system will cost over its remaining life.

Dual-fuel systems

Some Pennsylvania homes pair a heat pump with a gas furnace, switching to gas when the heat pump stops being the cheaper option. These need the changeover point set sensibly for your fuel prices, and a badly configured switchover quietly costs money all winter. We check that as part of any heat pump visit.