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 REPAIR · CUPERTINOHeat Pump Repair
Heat Pump Repair
in Cupertino, CA.
Cupertino heat pump short-cycling, iced over or heating on cold air only? HAXX tests refrigerant, controls and wiring, then repairs ducted and ductless units.
Serving Monta Vista, Rancho Rinconada, Fairgrove, Garden Gate, Lynbrook and Inspiration Heights and the rest of Cupertino. Share your address to confirm availability.
4.8 rating · 515+ reviewsHVAC & electrical, one teamPermits handledCA Lic #1081990
Heat pump problems
we diagnose and fix.
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.
Ice on the outdoor unit
Some frost in winter is normal. A unit that stays iced points to airflow, refrigerant or defrost-control problems.
Mini-split error codes
Blinking lights and error codes on Mitsubishi, Daikin, Fujitsu and other ductless systems, traced to the sensor, board or refrigerant issue behind them.
Short cycling and noise
Units that start and stop, rattle, hum or trip the breaker are checked for electrical, airflow and sizing problems.
Water leaks from indoor heads
Clogged condensate lines and drain pumps cleared and tested before water damages the wall.
Repair or replace advice
If the system is not worth fixing, you get the reasons in writing and options to compare, not pressure.
CUPERTINO DETAILSHeat pump service
Heat pump service
across Cupertino.
Cupertino heat pumps range from mini-splits added to Fairgrove Eichlers to ducted systems in rebuilt Rancho Rinconada homes. The fault usually depends on how the system was retrofitted.
01
Eichler retrofits
Fairgrove and Monta Vista Eichlers often rely on wall-mounted heads with long line sets. Drain, sensor and flare-joint problems are common there.
02
Second-story systems
Many newer two-story homes in Rancho Rinconada and Garden Gate run a separate upstairs unit. HAXX checks both zones when one floor stops keeping up.
03
Power side included
As a C-10 electrical contractor, HAXX also checks the breaker, disconnect and low-voltage wiring instead of sending a second trade.
What customers say
about HAXX.
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.”
HOW A REPAIR VISIT WORKSFrom the first call
From the first call
to a working system.
01
Tell us the symptom
Brand, model and what it is doing. Photos of the label or error code help.
02
Diagnose on site
The technician tests the system and finds the cause, not just the symptom.
03
Approve the price
You see the repair price before work starts, and the options if a repair is not worth it.
04
Fix and test
The repair is completed and tested, or scheduled once the part arrives.
HAXX ON SITEReal work.
Real work.
Real homes and businesses.
A closer look at recent heating and cooling work by HAXX. Projects in Cupertino are marked with the city.
THE PEOPLE BEHIND THE WORKHands-on work.
Hands-on work.
A real look inside.
On site during a commercial VAV box repair: access above a suspended ceiling, equipment and the work in progress.
Explore recent projectsRecent Projects
Heat Pump Air Handler Service
Heat pump air handler service.
Compressor Replacement
Compressor replacement.
Mitsubishi Leak Detection
Mitsubishi leak detection.
After-Hours System Repair
After-hours system repair.
Cupertino Main Panel Installation
Main panel installation.
Cupertino Main Panel Upgrade
Main panel upgrade.
Cupertino EV Charger Installation
Ev charger installation.
Cupertino Tesla Wall Connector Installation
Tesla wall connector installation.
GOOD TO KNOW
Heat Pump Repair in Cupertino: questions, answered.
Why is my heat pump blowing cool air in heating mode?
Common causes are a stuck reversing valve, a failed defrost board, a bad sensor or a low charge from a leak. HAXX tests each before recommending a repair.
Do you work on Mitsubishi heat pumps in Cupertino?
Yes. HAXX installs Mitsubishi Electric and services most other heat pump brands, ducted and ductless.
Is it worth repairing an older heat pump?
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.
Do you repair ductless mini-splits?
Yes. HAXX services wall, ceiling cassette and ducted mini-split heads, single-zone and multi-zone.
LET’S TALK ABOUT YOUR PROPERTYTell us what you need.
Tell us what you need.
We’ll start there.
Share the property, equipment and questions you have in mind.
(408) 901-8315
Call HAXX to discuss your property and scheduling.