No heat or no cooling
Checking the thermostat call, outdoor unit, reversing valve and controls to find why the system runs but does not heat or cool.
Heat pump not heating, not cooling or tripping its breaker? HAXX troubleshoots ducted and ductless heat pumps in homes throughout the City of Napa.
Serving Fuller Park, Napa Abajo, Alta Heights, Browns Valley, Westwood and Shurtleff and the rest of Napa. Share your address to confirm availability.

Ducted systems, ductless mini-splits and multi-zone heat pumps. Tell us what the system is doing and we start the visit with that symptom.
Checking the thermostat call, outdoor unit, reversing valve and controls to find why the system runs but does not heat or cool.
Some frost in winter is normal. A unit that stays iced points to airflow, refrigerant or defrost-control problems.
Blinking lights and error codes on Mitsubishi, Daikin, Fujitsu and other ductless systems, traced to the sensor, board or refrigerant issue behind them.
Units that start and stop, rattle, hum or trip the breaker are checked for electrical, airflow and sizing problems.
Clogged condensate lines and drain pumps cleared and tested before water damages the wall.
If the system is not worth fixing, you get the reasons in writing and options to compare, not pressure.
Napa heat pumps work hard in both directions: long warm summers and cold valley nights in winter. Most failures trace back to a few parts that can be tested on site.
A unit stuck in cooling on a cold morning usually points to a reversing valve, defrost board or outdoor sensor. Each is checked before a part is ordered.
Heat pumps installed in Fuller Park and Alta Heights homes often feed older duct runs. Leaky or undersized ducts can look like an equipment fault.
As a C-10 electrical contractor, HAXX also checks the disconnect, breaker, wiring and thermostat on the same call.
Rated 4.8 across 515+ reviews on Housecall Pro, Google and Facebook. Read more reviews.
“Thorough diagnostics of A/C system, identified and repaired the issue quickly!”
“Service was performed well and on time. Service person was highly skilled and provided easy to understand options to deal with the issue. Price for diagnostics was reasonable and easy to pay online.”
“Our commercial building had several HVAC problems, and their team carefully diagnosed each unit, explained the available options, and never pressured us into unnecessary replacements. They worked hard to repair what could be repaired and kept us informed throughout the process.”
Brand, model and what it is doing. Photos of the label or error code help.
The technician tests the system and finds the cause, not just the symptom.
You see the repair price before work starts, and the options if a repair is not worth it.
The repair is completed and tested, or scheduled once the part arrives.
A closer look at recent heating and cooling work by HAXX.

On site during a commercial VAV box repair: access above a suspended ceiling, equipment and the work in progress.
Explore recent projects
Heat pump air handler service.

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Heat pump installation.

Outdoor heat pump installation.

Heat pump air handler installation.

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Common causes are a defrost cycle that will not end, a failed reversing valve, a bad sensor or low refrigerant. HAXX tests each before recommending a fix.
Yes. HAXX services wall, ceiling and slim-ducted ductless heads as well as central ducted systems.
It depends on the fault, the refrigerant the system uses and the condition of the compressor and coils. HAXX explains the repair cost against replacement options so you can decide.
Yes. HAXX services wall, ceiling cassette and ducted mini-split heads, single-zone and multi-zone.
Share the property, equipment and questions you have in mind.
(408) 901-8315
Call HAXX to discuss your property and scheduling.
