Is our Peninsula technician actually based in San Mateo, or is that just marketing language?

It's accurate. Our Peninsula-based technician lives and works out of San Mateo and covers this stretch of the Peninsula directly, from here down to Belmont and Foster City and up toward Burlingame. San Mateo calls aren't routed through the San Ramon shop first.

My GrandAire furnace is about eight years old and the igniter just failed. Repair or replace?

At eight years, repair almost always makes sense for an igniter or flame sensor failure. GrandAire shares its parts catalog heavily with Carrier, so those components aren't expensive or hard to source. Replacement conversations come up when we find something structural, a cracked heat exchanger or a compressor that's failed outright, not from routine ignition component wear at this age.

What's covered in the $99 diagnostic visit?

We check board fault codes, run the ignition sequence and measure flame sensor signal on a furnace, or check electrical values and refrigerant condition on a condenser, and give you a clear written quote for what it takes to fix it. If you book the repair, the $99 is credited against the final bill.

GRANDAIRE · SAN MATEO

Service · All GrandAire Models

GrandAire Heat Pump, AC & Furnace Repair · San Mateo, CA

GrandAire furnace and AC repair in San Mateo, home base for our Peninsula technician covering the neighborhoods from San Mateo Park to Shoreview.

$99 diagnostic (waived with repair)
Same or next-day best effort
CSLB #1136642

Call (925) 999-4095

GrandAire in San Mateo

GrandAire in San Mateo kitchens.

San Mateo has more range in its housing stock than most Peninsula cities we cover. San Mateo Park and the streets near Central Park have older homes, some with original ductwork retrofitted decades ago for a furnace that was never part of the initial build. Hillsdale and Shoreview lean newer, postwar tract construction with central systems designed in from the start. GrandAire equipment shows up across both, usually as the budget choice when an aging system finally needed full replacement rather than another repair.

This is also the city our Peninsula-based technician calls home, so San Mateo calls aren't routed through anyone driving in from elsewhere. That matters for a brand like GrandAire, where diagnosing correctly means reading the Carrier-family board fault codes accurately and checking the ignition sequence, flame sensor signal, and capacitor condition in the right order rather than guessing at the first likely cause. We do the same diagnostic process here we'd do anywhere, board codes first, mechanical checks second, but there's no drive time built into getting to a San Mateo call.

Bay Area HVAC Service is the HVAC division of ADRIUM Service Solutions, an owner-operated company. Diagnostic is $99, waived when you approve the repair, and every job comes with a written quote before work starts. We're licensed under CSLB 1136642 and hold EPA Section 608 Universal certification, and we schedule seven days a week.

Common repairs we do

What we close on the truck.

Igniter failure in San Mateo Park's older retrofitted furnace closets. In the older homes around San Mateo Park, furnace closets were frequently added or modified after the original construction, and airflow around the unit isn't always ideal. The silicon nitride igniter on a GrandAire furnace in one of these tighter spaces tends to wear on a similar timeline to elsewhere, three to six years typically, but the symptom is the same everywhere: the inducer runs, the igniter glows weak or not at all, and the board locks out the burner after a couple of failed attempts. We verify resistance against spec before replacing.
Flame sensor fouling in Hillsdale and Shoreview tract furnaces. The postwar tract furnaces common in Hillsdale and Shoreview see steady seasonal use, and a flame sensor that's gone a few years without cleaning develops an oxide coating that drops the microamp signal below what the board needs to keep the gas valve open. The result is a burner that lights, runs briefly, and shuts down repeatedly until lockout. We clean the sensor and re-check the signal before deciding if it needs outright replacement.
Capacitor and contactor wear on GrandAire condensers city-wide. San Mateo gets warm enough in summer that GrandAire condensers here run a full cooling season regardless of neighborhood, and run capacitors weaken from that steady cycling over several years. A compressor that hums but won't start, or a fan that spins slow and runs hot, points to a failing capacitor. A pitted contactor shows up as intermittent cooling or a hard start. We check both together, since one commonly takes the other down with it.

Models we service

GrandAire product lines.

Gas furnaces (value single-stage)
Heat pumps and AC condensers
Air handlers and coils
Builder and supply-house equipment
Diagnostics, board and igniter repair, warranty work

Pricing and warranty

What it costs. What we stand behind.

$99

Diagnostic visit. Waived when you book the repair with us.
Written

3 months standard, 1 year on inverter boards, up to 2 years on sealed-system rebuilds. Quoted in writing before work starts.
CSLB

#1136642. Bonded and insured. We file warranty paperwork when applicable.

Nearby cities

GrandAire service in neighboring cities.

More cities

GrandAire across our service area.

FAQ

GrandAire in San Mateo questions, answered.

Is our Peninsula technician actually based in San Mateo, or is that just marketing language?

It's accurate. Our Peninsula-based technician lives and works out of San Mateo and covers this stretch of the Peninsula directly, from here down to Belmont and Foster City and up toward Burlingame. San Mateo calls aren't routed through the San Ramon shop first.
My GrandAire furnace is about eight years old and the igniter just failed. Repair or replace?

At eight years, repair almost always makes sense for an igniter or flame sensor failure. GrandAire shares its parts catalog heavily with Carrier, so those components aren't expensive or hard to source. Replacement conversations come up when we find something structural, a cracked heat exchanger or a compressor that's failed outright, not from routine ignition component wear at this age.
What's covered in the $99 diagnostic visit?

We check board fault codes, run the ignition sequence and measure flame sensor signal on a furnace, or check electrical values and refrigerant condition on a condenser, and give you a clear written quote for what it takes to fix it. If you book the repair, the $99 is credited against the final bill.

Need GrandAire service in San Mateo?

Tell us what is broken. We will quote it.