Do you actually come out to Danville, or is that outside your area?

Danville is our backyard. Our San Ramon shop is a few miles from most of Danville, and we run calls there regularly across all the neighborhoods, from the older homes near downtown to the newer tracts out by Camino Tassajara. No extra travel charge, no scheduling penalty for being east of the 680.

Is GrandAire worth repairing, or should I be looking at a replacement?

That depends on the age and what failed. GrandAire is a budget-tier ICP brand, so if the unit is under twelve years old and the failure is a capacitor, contactor, igniter, or flame sensor, repair almost always makes financial sense. Parts are cheap because they share the Carrier catalog. If the heat exchanger is cracked or the compressor is gone on a fifteen-year-old condenser, the math shifts quickly and we will tell you that plainly. We give you a written repair quote and enough information to make that call yourself.

What does the $75 diagnostic include, and what kind of warranty do I get on the repair?

The $75 covers a full system evaluation: we read fault codes, check safeties, measure electrical values, and identify the specific failed component. If you approve the repair on the spot, the $75 drops off the bill entirely. Completed repairs come with a one-year parts and labor warranty. If we are quoting a new installation rather than a repair, that work carries a ten-year parts and ten-year labor warranty.

GRANDAIRE · DANVILLE

Service · All GrandAire Models

GrandAire Heat Pump, AC & Furnace Repair · Danville, CA

GrandAire furnace, heat pump, and AC repair in Danville, where Tri-Valley summers push budget condensers hardest.

$75 diagnostic (waived with repair)
Same or next-day best effort
CSLB #1136642

Call (925) 999-4095

GrandAire in Danville

GrandAire heating and cooling in Danville.

Danville sits deep in the Diablo Valley, and the summers here are real. Triple-digit days in July and August are not unusual, and that sustained heat load is exactly where a value-tier condenser like GrandAire shows its limits. Most of the housing stock in Danville is ducted: mid-century ranch slabs off Diablo Road, late-70s two-stories in the Greenbrook and Sycamore neighborhoods, and 90s builder tracts closer to Camino Tassajara. Those homes came with gas furnaces and central AC, which is exactly the configuration GrandAire serves. You are looking at a Carrier-platform unit built to a price, sold through supply houses and builder channels. That is not a knock. For a rental property on El Pintado, a budget replacement that needs to run reliably for another decade, or an ADU on a fixed allowance, it can be the right call. We work on them regularly.

Diagnosing GrandAire is straightforward because the control boards and communicating components are shared with the broader ICP and Carrier family. We read the board fault codes first, check the specific ignition sequence timing, measure flame signal microamps on the flame sensor, and verify capacitor and contactor condition before we condemn anything. No shotgun parts-swapping. In Danville summer heat, we pay particular attention to supply-air temperature rise on the furnace and refrigerant subcooling on the condenser, because an undersized charge or a failing TXV will show up fast when the outdoor ambient is 105 degrees. The parts commonality with Carrier is one of the few real advantages of this brand: most igniter, sensor, and capacitor repairs are same or next-day because the parts sit on shelves at local supply houses.

Bay Area HVAC Service is our HVAC division, operating out of San Ramon, a short drive from Danville. Diagnostic is $75, and we waive it when you move forward with the repair. Before we touch anything, you get a written quote. We carry EPA Section 608 Universal certification, and we work under CSLB license 1136642. Repair work carries a one-year warranty. New installations are backed by a ten-year parts and ten-year labor warranty. If there are utility rebates or incentive programs that apply to your equipment, we confirm the actual current amounts at estimate time.

Common repairs we do

What we close on the truck.

Cracked Igniter Causing No-Heat Lockout. Silicon nitride igniters on GrandAire furnaces fail from repeated thermal cycling, and Danville winter nights are cold enough that the furnace runs hard from October through March. The symptom is a call for heat that never produces a flame: the draft inducer spins up, the igniter glows briefly or not at all, and the board drops into lockout after two or three failed trials. We confirm the crack visually and measure resistance before replacing. The igniter is a Carrier-family part and typically ships same or next day from local supply.
Flame Sensor Fouling and Short-Cycle Burner Shutdown. A dirty flame sensor is one of the most common service calls we see on these units. The sensor reads the burner flame via microamp signal; once the ceramic rod picks up an oxide layer, the signal drops below the board threshold and the unit shuts the gas valve within seconds of ignition. You get heat for a moment and then nothing, repeated two or three times before lockout. We clean and re-measure the signal in microamps before closing the call. If the rod is cracked or the signal stays low after cleaning, we replace it.
Capacitor and Contactor Failure During Summer Cooling Season. Danville summers are hard on run capacitors. Sustained high ambient temperatures degrade capacitor dielectric faster than coastal climates, and a GrandAire condenser sitting on the south or west side of a house bakes for hours. A weak capacitor shows as a sluggish or non-starting compressor and elevated amp draw. A pitted contactor shows as a hum at the condenser with no compressor engagement, or intermittent cooling dropout on the hottest days. Both are same or next-day repairs with stock parts, and we check both components together since one often takes the other out first.

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.

$75

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

90 days on consumables, 1 year on major parts, 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.

FAQ

GrandAire in Danville questions, answered.

Do you actually come out to Danville, or is that outside your area?

Danville is our backyard. Our San Ramon shop is a few miles from most of Danville, and we run calls there regularly across all the neighborhoods, from the older homes near downtown to the newer tracts out by Camino Tassajara. No extra travel charge, no scheduling penalty for being east of the 680.
Is GrandAire worth repairing, or should I be looking at a replacement?

That depends on the age and what failed. GrandAire is a budget-tier ICP brand, so if the unit is under twelve years old and the failure is a capacitor, contactor, igniter, or flame sensor, repair almost always makes financial sense. Parts are cheap because they share the Carrier catalog. If the heat exchanger is cracked or the compressor is gone on a fifteen-year-old condenser, the math shifts quickly and we will tell you that plainly. We give you a written repair quote and enough information to make that call yourself.
What does the $75 diagnostic include, and what kind of warranty do I get on the repair?

The $75 covers a full system evaluation: we read fault codes, check safeties, measure electrical values, and identify the specific failed component. If you approve the repair on the spot, the $75 drops off the bill entirely. Completed repairs come with a one-year parts and labor warranty. If we are quoting a new installation rather than a repair, that work carries a ten-year parts and ten-year labor warranty.

Need GrandAire service in Danville?

Tell us what is broken. We will quote it.