Do you actually come out to Los Altos, or is that outside your service area?

We cover Los Altos regularly. Our shop is in San Ramon, which puts us about 25 to 30 minutes from most of the city depending on traffic through the 680 and 101 interchange. There is no additional travel charge for the drive.

Is Tempstar equipment a reasonable fit for a Los Altos home, or should I be looking at replacing it with a different brand?

Tempstar is built on the same Carrier platform as Heil and Comfortmaker, so the core engineering is solid. For a mid-century Los Altos ranch with existing ductwork, a Tempstar system is a sensible and usually lower-cost path than stepping up to a Carrier badge for identical internal components. Where the brand trades off is dealer density, which means parts sourcing and service can depend more on your contractor than with a larger network. If the existing system is still running efficiently and the ducts are in reasonable shape, a well-executed repair is almost always a better financial decision than replacement.

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

The $75 covers a full system evaluation: fault code retrieval, electrical measurements, refrigerant pressure check if the complaint calls for it, and a written quote before any parts are ordered or installed. If you approve the repair that same visit, the $75 comes off the total. Work we perform carries a one-year warranty on both parts and labor. If a replacement part fails within that window, we come back and make it right at no charge.

TEMPSTAR · LOS ALTOS

Service · All Tempstar Models

Tempstar Heat Pump, AC & Furnace Repair · Los Altos, CA

Tempstar heat pump, AC, and furnace repair in Los Altos, where mid-century ranch tract systems finally need the attention they've been putting off.

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

Call (925) 999-4095

Tempstar in Los Altos

Tempstar heating and cooling in Los Altos.

Los Altos skews toward mid-century ranch houses on flat lots, most of them with original or once-replaced ducted systems. The climate here is milder than the Tri-Valley by a solid margin, but summers still push into the 90s on inland-wind days, and the bay influence keeps humidity up enough that outdoor coils see real corrosion pressure. A lot of the Tempstar equipment I service in this area went in during the 2000s and early 2010s through smaller independent dealers, which is exactly who sold this brand. The hardware is sound, Carrier-platform through and through, but it has years on it now and the wear parts are starting to show.

On a Tempstar, the diagnostic starts with the control board fault codes, not with assumptions. These communicating and single-stage boards log the last several faults, and reading that history tells me whether I'm chasing a one-time event or a recurring failure pattern before I touch anything. For homes near the lower Los Altos foothills or backing up toward Adobe Creek, I always check the outdoor coil and electrical compartment for corrosion even when the complaint is unrelated. Salt-laden marine air works into screw terminals and contactors over years, and a capacitor test alone won't catch a connection that's borderline.

Bay Area HVAC Service runs out of San Ramon and covers Los Altos without a trip surcharge. The diagnostic fee is $75, and that fee comes off the bill if you move forward with the repair the same visit. Nothing gets touched until you have a written quote in hand. We hold EPA Section 608 Universal certification for any refrigerant work, and we operate under CSLB license 1136642. Repairs carry a one-year labor and parts warranty. On a full system replacement the warranty is ten years on parts and ten years on labor.

Common repairs we do

What we close on the truck.

Hot Surface Igniter Failure. The QuietComfort furnaces use a silicon nitride igniter that becomes brittle with heat cycles over time. The symptom is a no-heat call where the inducer runs, the pressure switch closes, but the burners never light and the board logs a lockout after three tries. I test igniter resistance before condemning it, because a cracked igniter can read in-spec cold and still fail to glow fully under load. Replacement is straightforward and the correct OEM igniter is a direct swap on most Tempstar 80 and 96 percent units.
Flame Sensor Cutout After Ignition. This one comes in as an intermittent heat complaint, usually described as the furnace starting and then shutting off after a few seconds. The flame sensor rod builds up an oxide coating that increases resistance and makes the board read a weak or absent flame signal even when combustion is normal. In the cooler and damper end of Los Altos winters, systems that sat unused through the mild stretch often show this on the first cold snap. A light abrasive cleaning of the rod restores the microamp reading, and I verify the live signal with a meter before buttoning the panel up.
Condenser Capacitor and Contactor Wear. On the cooling side, the most common call I run in Los Altos is a heat pump or AC condenser that hums but won't start, or starts slow and trips the breaker. Nine times out of ten it's a capacitor that's drifted out of spec on the run winding or has simply failed, combined with a contactor whose contacts are pitted from normal switching wear. On units that sit close to the bay side of town the contactor corrosion can move faster than age alone would predict. I test both before replacing either, pull the actual capacitance reading rather than guessing by age, and use a rated replacement, not a universal substitute.

Models we service

Tempstar product lines.

Gas furnaces (Ion and QuietComfort series)
Heat pumps and AC condensers
Variable-speed communicating systems
Air handlers and coils
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

Tempstar service in neighboring cities.

FAQ

Tempstar in Los Altos questions, answered.

Do you actually come out to Los Altos, or is that outside your service area?

We cover Los Altos regularly. Our shop is in San Ramon, which puts us about 25 to 30 minutes from most of the city depending on traffic through the 680 and 101 interchange. There is no additional travel charge for the drive.
Is Tempstar equipment a reasonable fit for a Los Altos home, or should I be looking at replacing it with a different brand?

Tempstar is built on the same Carrier platform as Heil and Comfortmaker, so the core engineering is solid. For a mid-century Los Altos ranch with existing ductwork, a Tempstar system is a sensible and usually lower-cost path than stepping up to a Carrier badge for identical internal components. Where the brand trades off is dealer density, which means parts sourcing and service can depend more on your contractor than with a larger network. If the existing system is still running efficiently and the ducts are in reasonable shape, a well-executed repair is almost always a better financial decision than replacement.
What does the $75 diagnostic fee actually include, and what warranty do I get on the repair?

The $75 covers a full system evaluation: fault code retrieval, electrical measurements, refrigerant pressure check if the complaint calls for it, and a written quote before any parts are ordered or installed. If you approve the repair that same visit, the $75 comes off the total. Work we perform carries a one-year warranty on both parts and labor. If a replacement part fails within that window, we come back and make it right at no charge.

Need Tempstar service in Los Altos?

Tell us what is broken. We will quote it.