Expert HVAC Repair
Your trusted heating & air conditioning experts. 18+ years serving the Bay Area with same-day service.
Schedule Your Service
Fast response — usually within 30 minutes
No obligation. No spam. Just honest service.
4.9★ on Yelp
4.9★ · 900+ reviews
18+ Years
Serving the Bay Area
Licensed & Insured
CA License
Satisfaction Guaranteed
100% Promise
HVAC Services
From emergency repairs to full system installations, Therma Tech has you covered with honest pricing and expert service.
AC Repair & Installation
San Jose summers demand reliable air conditioning. Seamless AC installation and fast repair for homes and businesses.
Heating Repair & Installation
Stay warm all winter with expert heating services. 18+ years of experience installing and repairing furnaces.
Heat Pump Solutions
Energy-efficient heating and cooling in one system. Reduce your carbon footprint while staying comfortable year-round.
Tune-Up & Maintenance
Routine maintenance to avoid breakdowns. Our tune-ups keep your system running smoothly and lower energy bills.
Deals You Won't Find Anywhere Else
Take advantage of these exclusive offers — save money while keeping your home comfortable year-round.
AC Tune-Up Special
Complete 21-point inspection, filter replacement, and system optimization.
New Full System Installation
Any new high-efficiency AC or furnace installation. Includes free estimate.
Diagnostic with Repair
Free diagnostic when you approve any repair. No hidden fees, ever.
What Our Customers Say
Rated 4.9 stars across 706 Yelp and 215 Google reviews
"5 Stars!!! John and his crew were truly amazing. Very professional, patient, and took time to answer all my questions. They went above and beyond."
Nancy F.
3 weeks ago
"Wow, amazing service. Another company said it couldn't be fixed. Therma Tech had it running in ~1 hour. Would definitely recommend!"
James S.
6 months ago
"My service tech was efficient and honest. Other company quoted $18K for full replacement. Therma Tech fixed the fuse — done."
Bruce I.
6 months ago
"SUPER fast response, totally on time. They've been our go-to for 10 years. They have the best and most honest technicians."
Winnie C.
8 months ago
"Called at 5:30 PM on Friday, hottest day of the week. Had a technician on site within 30 minutes. Outstanding service!"
Dan W.
7 months ago
"I now fully understand why ThermaTech has such a fantastic Yelp rating. Thorough $89 Furnace Tune-Up including cleaning and complete examination."
Carl M.
3 months ago
Areas We Serve
Proudly serving communities throughout the South Bay, Peninsula and East Bay
Affordable Comfort, Zero Stress
Don't let budget concerns stop you from getting the comfort you deserve. We offer flexible financing options so you can get a new system installed today and pay over time.
Ask About FinancingFrequently Asked Questions
Straight answers about HVAC repair, pricing, and service across the South Bay & East Bay.
Ready to Schedule Your Service?
From repairs to full installations — our NATE-certified technicians are ready to keep your home comfortable. Book online or call us.