Mini Split Repair in San Jose, CA
Mini split showing an error code, leaking, or icing up? Our Mitsubishi-trained techs repair every ductless brand across San Jose.
Mini Split Repair in San Jose & the Bay Area
A ductless mini split that's throwing an error code, leaking water from the indoor head, or icing over isn't something to wait out — most of these failures get worse the longer the system keeps trying to run. Promax repairs mini split systems across San Jose and Santa Clara County from every major brand, and as a Mitsubishi Diamond Contractor our techs get factory training most independent repair shops never see.
An indoor head that's dripping or leaking almost always traces back to a clogged condensate drain line, a dirty or clogged filter restricting airflow, or a refrigerant charge that's drifted low enough to freeze the coil and then leak as it thaws. Icing on the indoor coil or the outdoor unit's refrigerant lines points to the same handful of causes — low refrigerant, a failing sensor, or blocked airflow — and running the system through an ice-up repeatedly can damage the compressor, so we recommend shutting it off (fan on) and calling rather than waiting.
Error codes vary by brand and sometimes even by model line, but our techs carry brand-specific diagnostic tools and reference the actual manufacturer fault tables instead of guessing from a generic chart. We repair Mitsubishi, Daikin, Fujitsu, LG, Cooper & Hunter, and Gree systems, and most repairs — capacitors, sensors, drain pumps, refrigerant leaks — finish in a single visit with parts we carry on the truck.
Mini Split Repair, Done Right
Every mini split repair visit is built around three things: finding the real cause, fixing it with parts already on the truck, and getting a licensed technician to your door fast. Same-day service for no-cool, no-heat and no-hot-water calls, 7 days a week. Diagnostic fee waived with any repair.
- Fully stocked trucks carry parts for most repairs on the first visit
- We repair Mitsubishi Electric, Daikin, Fujitsu and every other major brand
- Licensed, EPA-certified technicians on every call
- We stand behind our work — service and spare parts are both covered
What's Included With Mini Split Repair
Every mini split repair visit covers the items below, and the scope and price are confirmed in writing before any work starts. When it's finished the technician walks you through what was done and what to watch for. We call back within one business hour, 7 AM – 10 PM.
- Brand-specific error code diagnosis, not a generic chart
- Condensate drain and drain pump clearing
- Refrigerant leak detection, repair, and recharge
- Sensor, capacitor, and control board replacement
- Indoor head deep cleaning when airflow or icing is the cause
- Upfront flat-rate pricing before any repair begins
Signs You Need Mini Split Repair
Each symptom below means a part is wearing out or already failing, and these problems rarely fix themselves. Waiting usually lets a small fault damage other components, which turns a modest repair into a larger one and raises the odds of a breakdown at the worst possible time. Call (669) 777-1997 or book online, and a technician will pinpoint the cause.
- The indoor head is dripping or leaking water
- Ice is visible on the indoor coil or outdoor refrigerant lines
- An error code is flashing on the head or remote
- Weak airflow or the system won't reach the set temperature
- Short-cycling, or the outdoor unit won't start
- Unusual noise from the indoor head or outdoor condenser
Brands We Repair
Promax is a Mitsubishi Diamond Contractor, so Mitsubishi Electric equipment is repaired by technicians with factory-backed training. We repair every other major brand as well, whatever name is on your equipment. Our fully stocked trucks carry common parts for these brands, so most repairs are finished in a single visit.
Need mini split repair help in San Jose?
Related Services
Most mini split repair jobs touch one of these, and the same licensed Promax team handles all of them. Each page lists what's included, typical costs and the questions San Jose homeowners ask most. Not sure which you need? Call (669) 777-1997 and we'll point you to the right one.
Where We Work
Promax Service Group serves homes and businesses in San Jose, across Santa Clara County, and in nearby Peninsula and East Bay cities. Same-day service for no-cool, no-heat and no-hot-water calls, 7 days a week. Choose your city for local details, or call (669) 777-1997 to confirm we cover your address.
Frequently Asked Questions
My mini split is leaking water — is that serious?
It's worth addressing quickly, even if it doesn't feel urgent. A leaking indoor head is almost always a clogged condensate drain or a low refrigerant charge causing the coil to freeze and then drip as it thaws — left alone, either one can damage drywall, flooring, or the unit itself. We can usually diagnose and fix it in one visit.
What does an error code on my mini split mean?
It depends on the brand — Mitsubishi, Daikin, Fujitsu, and LG each use different fault code systems. Snap a photo of the code on the head or remote when you call; our dispatcher can often narrow down the likely cause before we roll a truck, and our techs carry the manufacturer fault tables for accurate, fast diagnosis on-site.
Do you repair mini splits you didn't install?
Yes — we service every major ductless brand regardless of who installed it, including systems installed by other contractors or the previous homeowner. Being a Mitsubishi Diamond Contractor means deeper factory training on Mitsubishi specifically, but our techs are equipped to diagnose and repair Daikin, Fujitsu, LG, Cooper & Hunter, and Gree systems as well.
Why is my mini split icing up?
The usual causes are low refrigerant from a slow leak, a dirty air filter restricting airflow, a failing blower fan, or a stuck reversing valve. Running it through repeated ice-and-thaw cycles stresses the compressor, so turn the system off (fan only) and call us rather than letting it keep cycling.
How much does mini split repair cost?
Common repairs like drain clearing, capacitors, and sensors typically run $150–$450. Refrigerant leak repairs cost more depending on the leak location and refrigerant type. You'll always get a firm quote before any repair starts, and the diagnostic fee is waived when you approve the repair.
Can you service a mini split that's still under manufacturer warranty?
Yes — as a Mitsubishi Diamond Contractor we're an authorized service point for Mitsubishi warranty work, and we can diagnose most other brands' warranty claims and coordinate with the manufacturer where needed. Bring your proof of installation date and we'll confirm coverage before any billable work starts.