Heat Pump Not Heating in Richmond, CA

Heat Pump Not Heating in Richmond

Richmond runs heating-first. Near the bay the summers stay mild and a lot of homes lean on the heat pump far more than the AC side, though it warms up the further inland you go. When the unit stops putting out warm air in December or January, it feels like the whole system died. It almost never is. A heat pump heats by running its refrigerant cycle in reverse, and most no-heat calls trace back to one component in that reversal failing: a stuck reversing valve, a defrost board that quit, low refrigerant, or a contactor that is not pulling the outdoor unit in.

The other common piece is electric backup heat. Older Richmond homes that were switched from a gas furnace to a heat pump often carry auxiliary heat strips for the coldest mornings. If those strips fail or the control board never calls for them, the house feels cold on a frosty morning even though the compressor is technically running. People read that as the heat pump failing when the real fault is in the aux circuit.

Richmond winters never push a heat pump near its limits, so a unit that quits heating has a fault somewhere in the equipment. We diagnose the actual failure before quoting anything. The $75 diagnostic gets credited toward the repair when it runs over $200.

Common causes

Reversing valve stuck in cooling. The reversing valve is what flips a heat pump between cooling and heating. When its solenoid sticks or the valve body hangs partway, the unit keeps running but blows cool or neutral air in heat mode. We confirm it by reading line temperatures across the valve and listening for the solenoid click on a mode change. A stuck solenoid coil is a cheap fix; a seized valve body means replacing the valve.

Defrost control fault. Off the Richmond waterfront, the outdoor coil ices up in cold damp fog and the unit needs a working defrost cycle to clear it. A bad defrost board or failed defrost sensor leaves the coil iced over, and an iced coil cannot absorb heat. We check the board's defrost timing and the sensor resistance, then verify the unit actually reverses to melt the ice.

Aux heat strips not engaging. On colder mornings the system should bring in electric backup heat. If a strip element burns open or the sequencer or board never energizes it, the house stays cold while the compressor runs. We test each strip element for continuity and confirm the board is calling for aux on a real heat demand rather than at the thermostat.

Low refrigerant charge. A slow leak drops capacity until the unit cannot pull enough heat from outside air to warm the house. We check superheat and subcooling, then find the leak rather than just topping off, because a recharge without a repair fails again in a season. On older R-410A systems we tell you whether repair or replacement is the honest call.

Failed contactor or capacitor. If the outdoor contactor pits or the run capacitor weakens, the compressor and fan do not start, so there is no heat at all. These are common, fast to test with a meter, and we carry both on the truck. This is one of the more frequent and least expensive no-heat causes.

How we diagnose it

Confirm the thermostat is actually calling for heat and the system is in heat mode, not stuck on a failed changeover signal.
Read refrigerant line temperatures across the reversing valve to confirm it reversed.
Inspect the outdoor coil for ice and test the defrost board and sensor.
Test aux heat strip elements for continuity and confirm the board calls for backup on demand.
Meter the contactor and run capacitor at the outdoor unit.

$75 diagnostic, credited toward any repair over $200. You get a written quote before any work begins.

Heat Pump Not Heating in Richmond: common questions

Do you actually cover Richmond, or are you based across the bay?

We are based in San Ramon and cover Richmond and the rest of the inner East Bay. We route the closest available tech and aim for same-day when we can, though that is best effort, not a guarantee. Call and we will give you a real window, not a vague all-day promise.

Will a heat pump even keep up in Richmond winters?

Easily. Richmond rarely sees real cold, and the heat pump's heating range covers our winters with room to spare. If yours stopped heating, that is a failed part to fix, not the climate beating the equipment. The fog matters more for coil icing and defrost than for raw capacity.

It still runs but the air feels cool. Is that the same problem?

Often that is a reversing valve stuck in cooling or a low charge, both of which leave the unit running while it fails to heat. It is a different diagnosis than a dead unit. We read line temperatures and pressures to tell which one it is before quoting a repair.

Nearby and related

Heat Pump Not Heating near Richmond: Berkeley · Oakland .

This is usually a heat pump installation & service in Richmond job. See our heat pump installation & service overview or the Richmond service area.