Heat Pump Not Heating in Saratoga, CA

Heat Pump Not Heating in Saratoga

Saratoga is climate zone 4 with hillside influence and mild winters, well within any heat pump's range. The homes tend to be large, and many run dual-zone or two complete systems, one upstairs and one down. That setup changes the diagnosis: a no-heat complaint here is very often one zone or one of two systems down, while the rest of the house heats fine.

When a whole system loses heat, the cause is the same set of part-level failures we see everywhere: a stuck reversing valve, a defrost fault, low refrigerant, or a contactor not pulling in. When only part of the house is cold, the answer is usually a zone control, a stuck damper, a failed sensor, or one of two condensers down. We also see plenty of premium older equipment in Saratoga that is well worth repairing rather than replacing.

We diagnose the actual fault, by zone, before quoting anything, and put it on a written estimate. The $75 diagnostic is credited toward the repair when it runs over $200.

Common causes

One zone or one system down. On Saratoga's dual-zone and two-system homes, half the house cold usually means a failed zone board, a stuck damper, a bad sensor, or one of two condensers down, not a total failure. We test each zone and each system separately and isolate the faulted circuit so the repair stays targeted.

Reversing valve stuck. The reversing valve switches a system into heating. A stuck valve or dead solenoid leaves the unit running but blowing cool air. We read line temperatures across the valve and check the solenoid on a changeover. A bad coil is cheap; a seized valve is a replacement.

Defrost control fault. Cold hillside mornings ice the outdoor coil, and the defrost cycle has to clear it. A failed defrost board or sensor leaves the coil iced and unable to absorb heat. We check defrost timing and sensor resistance and confirm the unit reverses to defrost.

Low refrigerant charge. A slow leak drops heating capacity. We measure superheat and subcooling, find the leak, and repair it rather than topping off. On the premium older equipment common here, repairing a small leak often makes more sense than replacing a system with years of life left.

Contactor or capacitor failure. A pitted contactor or weak capacitor keeps a condenser from starting, so that system makes no heat. Both are fast meter checks and we carry them. On a two-system home this can look like half the house dying when it is really one inexpensive part on one unit.

How we diagnose it

Confirm heat mode and a valid heat call at each thermostat or zone panel.
Determine whether the fault is one zone, one of two systems, or whole-house.
Test zone boards and dampers when only part of the house is cold.
Read line temperatures across the reversing valve and inspect the coil for ice.
Measure refrigerant charge, test the defrost control, and meter the contactor and capacitor on the affected system.

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

Heat Pump Not Heating in Saratoga: common questions

Do you service Saratoga, and how do you handle a large multi-zone home?

Yes, Saratoga is part of our South Bay route. On a dual-zone or two-system home we diagnose each zone and system separately so we find exactly what is down. We aim for same-day on no-heat calls when the schedule allows, best effort rather than a guarantee.

My system is well over a decade old. Should I repair the no-heat or replace?

It depends on the fault. On the premium equipment common in Saratoga, a small refrigerant leak, a defrost sensor, or a contactor is well worth repairing on a system with years of life left. If the diagnosis is a failed compressor or a major leak on aging equipment, we will give you the honest repair-versus-replace numbers.

Only the upstairs is cold. Is the whole heat pump bad?

Almost never. We test each zone and each system on its own and isolate exactly what is down, then quote the targeted repair rather than condemning equipment that is working fine elsewhere in the house.

Nearby and related

Heat Pump Not Heating near Saratoga: Los Gatos · Cupertino · Los Altos .

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