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 short cycling, frozen up or showing a fault code in Daly City? HAXX tests and repairs ducted and ductless heat pumps in fog-belt homes.
Serving Westlake, Serramonte, St. Francis Heights, Crocker, Southern Hills and Bayshore and the rest of Daly City. 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.
Daly City summers rarely climb past 75 degrees, so most heat pumps here spend the year heating. Long run hours and damp ocean air show up as wear on fans, coils and connections.
A heat pump that heats most of the year cycles through defrost often. Defrost boards, outdoor sensors and reversing valves are common repair points.
Units near the coast in Westlake and Southern Hills see moisture and salt air. HAXX checks coil condition, fan motors and electrical terminals for corrosion.
HAXX holds C-10 electrical and C-20 HVAC licenses, so a tripping breaker or damaged disconnect is diagnosed on the same call as the refrigerant side.
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
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That is usually a normal defrost cycle. If it repeats constantly or the unit ices over, a defrost sensor, control board or low refrigerant charge is the likely cause and HAXX can test each one.
Yes. HAXX services split systems and mini-splits in single-family homes, townhomes and condos, subject to any HOA rules on outdoor equipment.
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.
