The short answer
PrimeAir HVAC Repair Service repairs furnaces, heat pumps, air conditioners, thermostats, and ductwork in homes across San Mateo County, from Burlingame to Portola Valley. We offer 24/7 emergency service. Bay Area Air District rules do not require you to replace working equipment, so a repair is often a sensible choice.
PrimeAir HVAC Repair Service travels from our Fremont base, about 20 miles away, to repair heating and cooling systems in homes throughout San Mateo County. We work in bayside neighborhoods in Foster City and San Mateo and in hillside homes in Woodside, Emerald Lake Hills, and Portola Valley. On every call we find the actual cause, explain it in plain terms, and fix it. We also offer 24/7 emergency service for when a system quits at a bad time.
What We Repair
Most calls come from homeowners whose system won't start, runs without heating or cooling, or has started making a new noise. We work on the equipment commonly found in San Mateo County homes, both older systems and newer ones.
- Gas furnaces: ignition, flame sensor, blower motor, and pressure switch problems
- Heat pumps: weak heating or cooling, defrost problems, and outdoor unit faults
- Central air conditioners: low airflow, frozen coils, and failed capacitors or contactors
- Thermostats and controls: wiring faults, short cycling, and smart thermostat setup
- Ductwork: disconnected runs, leaks, and rooms that never get comfortable
Communities We Serve in San Mateo County
Our technicians cover Menlo Park, East Palo Alto, Redwood City, North Fair Oaks, Foster City, Atherton, San Carlos, Emerald Lake Hills, Belmont, San Mateo, Woodside, Highlands, Hillsborough, Burlingame, and Portola Valley. When you call, we confirm timing based on where you are and how urgent the problem is.
Repair or Replace? Local Rules to Know
The Bay Area Air District's appliance rules do not force anyone to replace working equipment. They apply only when an existing furnace or water heater fails or is replaced. If your furnace can be repaired reliably, keeping it is a legitimate option.
Planning ahead still makes sense. Under Rule 9-4, natural gas furnaces manufactured from 2029 must meet a zero-NOx emission standard. In practice, that points homeowners toward heat pumps for furnace replacements after that date. For small water heaters, Rule 9-6 set a 2027 zero-NOx date. The Air District Board is considering amendments in November 2026 that could delay it, so check the current rule before planning a water heater replacement.
Incentives and Tax Credits
The federal Energy Efficient Home Improvement Credit (25C) covered qualifying heat pumps placed in service before December 31, 2025. It is not available for new installations after that date. Bay Area homeowners can still check BayREN and their local clean energy provider for heat pump and electrification incentives. Amounts and availability change with each funding cycle, so we confirm the current offer before we mention it in a quote.
What to Expect on a Service Call
Your technician will ask what you've noticed, inspect the system, and test the parts most likely to be at fault. Before any work starts, we explain what's wrong and what the repair involves. If an older system needs repeated fixes, we'll say so honestly and walk you through your options without pressure.
