Warm air from the vents
Refrigerant, compressor, capacitor and airflow checks to find why the system runs without cooling.
AC blowing warm, freezing up or tripping a breaker? HAXX repairs central air and ductless cooling in Hillsborough homes, from the flats to the hills.
Serving Lower North Hillsborough, Ryan Tract, Country Club Manor, Tobin Clark, Carolands and Skyfarm and the rest of Hillsborough. Share your address to confirm availability.

Central air conditioners, heat pumps in cooling mode and ductless systems. Most visits start with a full diagnostic so the repair targets the real cause.
Refrigerant, compressor, capacitor and airflow checks to find why the system runs without cooling.
Thermostat, breaker, disconnect, contactor and control-board testing.
Usually airflow or refrigerant charge. We fix the cause, not just thaw the ice.
Blower motors, dirty coils, clogged filters and duct problems that leave rooms warm.
Buzzing, grinding or burning smells checked before a small problem becomes a failed compressor.
Condensate drains, pans and pumps cleared and tested.
Hillsborough runs from the flats near El Camino Real up steep western slopes toward I-280, and larger homes often cool with more than one system. Summer heat exposes weak capacitors, dirty coils and slow refrigerant leaks.
HAXX locates and repairs refrigerant leaks rather than topping off a system that will be low again next month.
Clogged condensate drains and failed float switches in large attics can damage ceilings. HAXX clears and tests them.
Many estate homes have systems from several remodels. HAXX services all major brands and older refrigerants where parts allow.
Rated 4.8 across 515+ reviews on Housecall Pro, Google and Facebook. Read more reviews.
“Their technician was professional, honest, and took the time to explain the problem and the repair process clearly. Instead of pushing for an expensive replacement, they repaired our HVAC system and helped us save a significant amount of money. The work was completed carefully, and our air conditioner is now working well.”
“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.”
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. Projects in Hillsborough are marked with the city.

On site during a commercial VAV box repair: access above a suspended ceiling, equipment and the work in progress.
Explore recent projects
Compressor replacement.

Leaking coil replacement.

System recharge and brazing correction.

After-hours system repair.

Mitsubishi leak detection.

Heat pump installation.

Outdoor heat pump installation.

Heat pump air handler installation.
Yes. Existing systems can be repaired as usual. HAXX will tell you if refrigerant type or part availability makes replacement the better value.
Low airflow from dirty filters or coils, a weak blower or low refrigerant are the usual causes. HAXX checks each before quoting.
Often, yes, in summer especially. Call and the team will confirm the earliest arrival window for your address.
Compare the diagnosed fault, the repair price and the system's age and refrigerant. HAXX shows both paths so you can choose.
Share the property, equipment and questions you have in mind.
(408) 901-8315
Call HAXX to discuss your property and scheduling.
