Heat Pump Repair in San Francisco

A heat pump working a San Francisco County house earns most of its wear on the heating side, where the refrigerant circuit runs cold and the compressor works hardest to pull heat from outdoor air. Homes in San Francisco County, CA run heat about seven months a year, from November through May. The contactor, the reversing valve, and the low-pressure side of the refrigerant circuit are what a contractor checks first, because those are the components the heating season loads. Capacity also falls as outdoor temperatures drop, so a unit that tests well in summer can show real deficiencies by January.

Ductwork laid down for a furnace or a wall heater does not automatically carry a heat pump's airflow requirements, and in San Francisco County that gap shows up regularly on repair calls. Half the homes in San Francisco County, California were built in 1946 or earlier (2020-2024 ACS 5-year). A contractor opening a heat pump in a house this old is often tracing a fault that lives not in the unit itself but in what the ducts around it are doing to static pressure and airflow. Refrigerant and electrical components get the first look, but the duct connections get checked too, because a system fighting its own distribution will keep failing.