— SAN JOSE AIR CONDITIONING CONTRACTOR
Air Conditioning Services in San Jose, CA
Rad Air Care US provides air conditioning repair, installation, replacement, and maintenance for homeowners, multi-unit properties, and eligible light-commercial properties throughout San Jose. Whether your system stopped cooling mid-summer or you’re planning a full replacement, we diagnose the actual issue on-site and give you a written estimate before any work begins.
Lic. #1134621 — CA CSLB Licensed & Insured
— WHAT WE DO
Our Air Conditioning Services
AC Repair
Warm air from the vents, a unit that won’t turn on, short cycling, or strange noises — we find the actual cause before quoting anything.
AC Installation & Replacement
New system or replacing an aging one — sized to your home, not a generic recommendation.
AC Maintenance
Seasonal tune-ups that catch small issues before they become breakdowns during San Jose’s hottest stretch.
Emergency AC Repair
AC failures don’t wait for business hours. We get someone out as fast as availability allows.
— TROUBLESHOOTING
Common AC Problems We Fix in San Jose
San Jose summers push AC systems harder than coastal towns a few miles away. These are the issues we see most often on service calls — and how we typically approach each one.
AC runs but the house stays warm
Often a refrigerant leak, dirty evaporator coils, or a system that was never sized for the home’s real load. We test the sealed system, clean the coils, and check whether the equipment matches the square footage and duct layout before recommending a fix.
Air from the vents feels warm or weak
Common causes include low refrigerant, a struggling compressor, or restricted airflow. We isolate the cause on-site and only recommend parts that address the actual failure — not a full replacement by default.
Ice on the indoor or outdoor unit
Usually poor airflow or low refrigerant driving coil temperatures too low. We thaw the system safely, correct the airflow problem (filter, ducts, blower), and restore the proper charge if needed.
Unit turns on and off every few minutes
Short cycling can come from a dirty filter, a failing thermostat, oversized equipment, or worn electrical parts like a contactor. We start with the simple checks and move to components only when the data points there.
Little or no airflow at the registers
A clogged filter is the first stop. If that’s not it, we inspect duct sections and the blower assembly so you’re not paying for a motor swap when the real issue is upstream.
Water under the indoor unit
Most often a clogged condensate drain, a damaged drain pan, or meltwater from a previously frozen coil. We clear the line, repair or replace the pan if required, and fix whatever caused the overflow.
System won’t turn on at all
Tripped breaker, failed capacitor, bad contactor, or a control issue. We verify power and safety circuits before assuming a major component has failed.
Thermostat doesn’t respond or won’t hold a setting
Dead batteries, loose wiring, or a failed control board are the usual suspects. We rule out the simple causes first, then test the control path.
Unusual noise or odor
Rattles and screeches often mean loose hardware, worn bearings, or debris in the cabinet. Burning or musty smells can point to electrical insulation, a dirty coil, or contamination in the ductwork — we track the source before guessing.
— MAKING THE CALL
Choosing the Right AC Solution
When maintenance helps
Your system runs fine but hasn’t been serviced recently, or you want to head off problems before peak cooling season.
When repair makes sense
Your system is under 10 years old, otherwise in good shape, and the issue is a single identifiable part.
When you need a new installation
New construction, a room addition, or a property that’s never had central cooling.
When replacement is better
Your system is past the 12–15 year mark, needs frequent repairs, or can’t keep the house comfortable no matter what’s fixed.
— EQUIPMENT
AC Systems We Service in San Jose
Central Air Conditioning
The standard for homes with existing ductwork; we service and install all major brands.
Ductless Mini-Splits
A common fix for San Jose homes without central ductwork, room additions, or garage conversions.
Window & Through-Wall Units
Repair and replacement for supplemental cooling in specific rooms.
— EVERY PROPERTY TYPE
AC Service for Every Property Type in San Jose
Single-Family Homes
Central AC or ductless systems sized to your home’s full square footage, with permits handled as part of the job.
Condos & Townhomes
Compact, quiet systems that work within HOA noise and setback rules.
New Construction
Properly sized systems installed alongside your build, coordinated with your other trades.
Older Homes Without Ductwork
Many San Jose homes built before 1980 have no central ducts. A ductless mini-split solves this without demolition.
Multi-Family & Rental Properties
Fast turnaround between tenants and direct coordination with property managers.
— WHERE WE WORK
Cities We Serve in the South Bay
We’re currently focused on three South Bay cities, with more service areas being added over time.
San Jose
Our home base — full AC repair, installation, replacement, and maintenance across all San Jose neighborhoods, from older homes without ductwork to new construction.
Campbell
Serving homeowners and light-commercial properties around Downtown Campbell, the Pruneyard, and the Los Gatos Creek Trail corridor.
Santa Clara
AC repair, installation, and maintenance for homes and businesses throughout Santa Clara.
Don’t see your city listed yet? We’re expanding to more South Bay communities soon — reach out and we’ll confirm availability in your area.
Energy Rebates for San Jose Homeowners
Depending on your utility provider, existing system, and the equipment you choose, you may qualify for rebates on a qualifying AC or heat pump upgrade. Availability and amounts change — see our full guide to HVAC Rebates & Incentives before you install.
— WHY US
Why San Jose Homeowners Choose Rad Air Care US
Licensed & Insured
CA CSLB Lic. #1134621
Written Estimates Before Any Work Begins
No surprise line items.
Straight Talk on Repair vs. Replace
Both options laid out, your call.
Local South Bay Team
Not a call center routing you to a subcontractor.
— FAQ
Frequently Asked Questions
Why is my air conditioner running but not cooling?
Usually a refrigerant leak, dirty coils, or a unit that was undersized for the home from the start. We diagnose the actual cause on-site before recommending anything.
How do i know if i need ACrepair or a full replacement?
Under 10 years old with a single failed part, repair usually makes sense. Past 12–15 years with repairs piling up, replacement is typically the better long-term move. We’ll lay out both options with a written estimate.
Is AC maintenance really worth it?
Yes — most of the emergency calls we get in July and August trace back to something a routine tune-up would have caught in spring.
What size AC unit do I need for my home?
It depends on square footage, insulation, window exposure, and ductwork — not just a rule of thumb. We calculate this on-site rather than guessing from home size alone.
Do you offer emergency AC repair in San Jose?
Yes. We get someone out as fast as availability allows when your system fails unexpectedly. After-hours work may carry an added charge, explained before we start.
Do you install ductless mini-splits in homes without ductwork?
Yes. Many San Jose homes built before 1980 were never built with central ducts. A ductless mini-split delivers full cooling without opening walls.
Are there rebates available for a new AC system?
Possibly, depending on your utility provider and the equipment you choose. See our HVAC rebates guide for current programs.
Do you service all AC brands?
Yes, we work on all major residential AC brands and equipment types.
Do you provide AC service for businesses in San Jose?
Yes — we serve eligible light-commercial properties and businesses throughout San Jose.
Need AC Service in San Jose?
Whether it’s a repair, a replacement, routine maintenance, or a new installation, Rad Air Care US is ready to help — with a written estimate before any work begins.