AC or Heat Out? Same-Day Repair Free Diagnostic with Repair.
Get a real technician at your door today. Honest pricing, no upsells, and 18+ years of trusted local service across the South Bay.
or call us directly(408) 629-5400Fastest way to reach us
Call or chat — we'll help right now.
Online forms are temporarily unavailable while we update our systems. Tap below to call, or use the chat icon in the bottom-right to message us.
Call (408) 629-5400Mon–Fri 7:00 AM – 5:30 PM · Sat 8:00 AM – 2:30 PM
Current Offers
Real savings — no fine print.
Pricing is upfront and locked before any work starts. If we can't help, you don't pay.
Free Diagnostic with Repair
We waive the $149 diagnostic fee when you approve any repair on the same visit. Straightforward — no upsell.
Reg. $149 diagnostic
Flexible Financing Plans
Financing available upon approval on qualifying installs. Keep the big bill off your card with manageable monthly payments.
Estimate in 60 Seconds
Use our online calculator to get a ballpark price for a new system before you ever pick up the phone.
Start estimateThinking about replacement?
Get an instant estimate on a new system — in 60 seconds.
Answer a few quick questions about your home and we'll show you a real ballpark price range — no phone call, no pressure. Perfect for planning ahead before you book a consultation.
- No contact info required to see pricing
- Tailored to your home size & system type
- Includes available rebates & financing
- Takes about 60 seconds
Typical 2,000 sq ft home, AC + furnace replacement
$10,500 – $14,500
Final pricing confirmed after a free in-home assessment. Estimate is for planning only.
What we fix
HVAC problems?
We've seen them all.
Most calls we handle the same day. Tell us what's happening and we'll have the right technician — and the right parts — at your door fast.
- AC not cooling
- Furnace not heating
- Strange noises
- Weak airflow
- High utility bills
- System won't turn on
Why Therma Tech
A local team built on doing the job right — not the job big.
We've been keeping South Bay homes comfortable for nearly two decades. Same crew, same standards, same straight answers.
About our company- 01
Fast local response
Same-day appointments across San Jose and the South Bay — most calls handled the day you book.
- 02
18+ years on the job
A team that's seen every system, every brand, every quirk. We diagnose accurately the first time.
- 03
Honest recommendations
We repair when we can and replace only when it makes sense. No pressure, no surprise add-ons.
- 04
Licensed & insured
CA Contractor License #913806. Fully insured technicians, clean work, and warrantied repairs.
From our neighbors
Reviews homeowners actually wrote.
4.9 average
900+ verified reviews
“Another company told me my AC couldn't be fixed and quoted $18,000 for a full replacement. Therma Tech showed up, found a blown fuse, and had the system running in under an hour.”
Bruce I.
San Jose homeowner
“Called at 5:30 PM on Friday — the hottest day of the week. A technician was on site within 30 minutes. Cool again before dinner.”
“John and his crew were truly amazing. Professional, patient, and went above and beyond what I expected.”
Heat Pump Installation
Heat Pump Installation Made Affordable.
Heat pumps are one of the most efficient ways to heat and cool your home. They improve comfort year-round, reduce energy use, and may qualify for valuable rebates depending on your system and eligibility.
Up to $6,500 in heat pump rebates
Rebate amounts vary based on equipment, home, utility program, and qualification requirements.
- Heating and cooling in one system
- Improved energy efficiency
- Lower monthly utility costs
- Better comfort year-round
- Quieter operation
- Environmentally friendlier
How it works
Booked in under a minute.
Book or call
Tap 'Book Online' to pick a time, or call us directly — whichever you prefer.
Tell us what's wrong
Describe the issue. We'll match the right technician and quote a fair visit window.
We confirm fast
You'll get confirmation by text or call. Most appointments scheduled the same day.
Where we work
Proudly local to the South Bay.
Headquartered in San Jose, serving homeowners across Santa Clara County and surrounding cities. If your zip is here, we can usually be there today.
Ready when you are
Don't wait until the problem gets worse.
Get fast, honest help from a trusted local HVAC team — most appointments booked the same day you call.
Or get an instant estimate online