Not heating or cooling
Low refrigerant, a failed sensor, a stuck expansion valve or a control fault. Each is tested before a part is ordered.
Mini-split showing an error code, leaking or not heating? HAXX fixes Mitsubishi, Daikin, Fujitsu, LG, Carrier and other ductless systems in Union City.
Serving Decoto, Alvarado, Holiday Park, Casa Verde, West View Estates and the Union City Station District and the rest of Union City. Share your address to confirm availability.

Wall, ceiling cassette and slim-ducted mini-splits that stop heating or cooling, leak water or show error codes. HAXX repairs single-zone and multi-zone systems from all major brands.
Low refrigerant, a failed sensor, a stuck expansion valve or a control fault. Each is tested before a part is ordered.
Fault codes are read and traced to the sensor, board or communication wire behind them.
Clogged condensate lines, failed pumps and dirty coils are cleared and the drain is tested.
Flare joints and line sets are leak-tested and repaired before the system is recharged.
Indoor blower and outdoor fan motors, capacitors and loose parts that cause rattling.
Filters, coils and blower wheels cleaned to restore output and stop musty smells.
Mini-splits now serve many Union City bedrooms, additions and ADUs. When a head stops cooling or heating, the fault is usually in the drain, a sensor, a board or the refrigerant circuit.
HAXX reads the fault code, tests sensors, boards and the wiring between indoor and outdoor units, and fixes the real cause.
Clogged drains, dirty blower wheels and coils cause dripping and musty smells. A deep cleaning often restores normal operation.
Leaks at flare fittings, failed fan motors and weak compressors are diagnosed with proper gauges and leak detection.
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
Mitsubishi leak detection.

After-hours system repair.

Heat pump installation.

Outdoor heat pump installation.

Heat pump air handler installation.

Heat pump air handler service.

Lennox ac installation.

Compressor replacement.
HAXX repairs Mitsubishi Electric, Daikin, Fujitsu, LG, Carrier and most other ductless brands, single-zone and multi-zone.
Most often the condensate drain is clogged or the unit is dirty and icing up. HAXX clears the drain, cleans the coil and checks the refrigerant charge.
Mitsubishi Electric, Daikin, Fujitsu, LG, Carrier and most other ductless brands, single-zone and multi-zone.
Often, yes. Sensors, boards, drains and fan motors are common, affordable repairs. If the compressor fails on an older unit, HAXX prices a replacement too.
Share the property, equipment and questions you have in mind.
(408) 901-8315
Call HAXX to discuss your property and scheduling.
