Diagnose first. Document everything. Fix it right.
United Heating & Air runs a documented diagnostic on every service call — refrigerant charge, electrical readings, airflow — before we ever quote a repair. Straight answers, honest pricing, Central Valley HVAC done right.
What we do
Full-service heating & cooling, done the diagnostic-first way
From same-day AC repair to whole-system replacement, every visit starts with real measurements — not guesses.
AC Repair
Diagnostic-first air conditioner repair — we find the actual failure before we quote a fix.
AC Installation
Properly sized, correctly installed central air conditioning systems built for Central Valley heat.
AC Maintenance
Seasonal tune-ups that catch small problems before they become July emergencies.
AC Tune-Up
A focused pre-summer inspection and cleaning to get your system ready for triple-digit days.
AC Replacement
Full system replacement when repair no longer makes financial sense — backed by a written comparison.
Central Air Conditioning
Whole-home central AC systems designed around your ductwork, insulation, and floor plan.
Ductless Mini-Split Systems
Zoned, ductless cooling and heating for additions, garages, ADUs, and homes without ductwork.
Evaporative Cooler Service
Swamp cooler repair, maintenance, and seasonal startup/shutdown service.
The United difference
We diagnose first. We document everything. We fix it right.
Full diagnostic visit
Refrigerant charge, electrical draw, airflow, and combustion readings — every time, no shortcuts.
Written findings, before any repair
You see the actual numbers and what they mean, in plain language, before you approve anything.
Upfront pricing
One quoted price for the fix — not a surprise invoice after the work is done.
Work you can verify
We show you the before-and-after readings so you can see the fix actually worked.
Customer reviews
What Central Valley homeowners say
“They showed me the actual refrigerant readings on paper before recommending anything. First HVAC company that's ever done that for us.”
“Furnace died the week it dropped to 38 degrees. They had a tech out same day and walked me through exactly what failed.”
“Got a second opinion after another company quoted a full replacement. Turned out to be a $220 capacitor. Saved us thousands.”
Not sure what you need?
Try our free HVAC Health Report
Answer a few questions about your system's age, symptoms, and usage, and get an instant plain-language read on whether you're looking at routine maintenance, a targeted repair, or a replacement worth planning for.
Get My HVAC Health Report