HVAC & AC Repair in Sunnyvale, CA

Trusted HVAC Contractor in Sunnyvale

Therma Tech has served Sunnyvale homeowners for more than 18 years. Whether your AC quit on the hottest day of the year, your furnace is making a strange noise, or you're ready to upgrade to a high-efficiency heat pump, our local technicians can usually be at your Sunnyvale address the same day you call.

We know Sunnyvale homes — older bungalows with retrofitted ductwork, mid-century ranches, newer multi-story builds in the foothills — and we size systems and route ductwork accordingly. No cookie-cutter quotes. Every job starts with an honest diagnostic and ends with a system you can forget about until the next tune-up.

All work is performed by W-2 employees, not subcontractors. We're licensed (CA #913806), insured, and a Carrier authorized dealer. Most repairs come with a one-year warranty and new installs are backed by manufacturer warranties up to 10 years.

Services Available in Sunnyvale

• AC Repair & Installation
• Heating & Furnace Repair
• Heat Pump Installation & Service
• HVAC Tune-Up & Maintenance
• Commercial HVAC Service

Why Sunnyvale Homeowners Choose Therma Tech

• Same-day appointments across Sunnyvale
• $149 diagnostic, waived with any approved repair
• Upfront, written pricing — no surprises
• NATE-certified, background-checked technicians
• Financing available upon approval on new installs
• Carrier authorized dealer with full warranty support