Furnace & heating
AC repair
Heat pumps
Ductless mini splits
Carrier
Trane
GoodmanSeasonal tune-up and full diagnostic on your Carrier, Trane, or Goodman system - readings shown to you before any repair is proposed
Diagnosis first, numbers second - you approve the repair price before a single part goes in.
Get your free estimateFast, Reliable Furnace Repair Across Los Gatos
Furnace repair in Los Gatos typically runs $150 – $700, with most jobs completed same-day or next-day when parts are on hand. Our techs know the hills, the canyons, and the older housing stock that makes this town different from the flat valley cities nearby. If your heat is out or short-cycling, call (669) 800-4179 and a live person answers, 24 hours a day.
Los Gatos homes demand a specific kind of attention. A 1920s Craftsman near downtown, a mid-century ranch along Los Gatos Boulevard, and a custom estate up in the Kennedy Road hills all have different furnace configurations and failure patterns. We send techs who have worked all of them. The written price comes before any tool leaves the van, and every repair carries a 365-day guarantee in writing.
Why Cold Harbour Heating and Air San Jose Is Los Gatos’s Preferred Furnace Repair Company
Homeowners in Los Gatos call us because we show up when we say we will and put the price on paper first. Victor Mancini founded this company in 2003 on a simple idea: HVAC work should be contracted like any other trade, with a written scope and a written guarantee. That is The Kingswell Way, and it is the standard every Los Gatos job follows.
Our technicians are background-checked, uniformed, and trained to service nine major residential brands including Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. When a furnace quits in a hillside home off Shannon Road or a split-level off Blossom Hill, the tech who arrives knows how to diagnose the system without guessing. Response time to most Los Gatos neighborhoods is same-day, and the phone never rolls to voicemail.
Los Gatos customers rely on us for one reason above all: if a repair fails within 365 days, we return and correct it at no charge. That promise is written on every repair ticket, not implied. It is how Victor wanted it from the start, and it has not changed.
Styles & brands we work with
Heat Pump Repair in Los Gatos
Heat pump repair in Los Gatos homes is a growing share of our work, especially where older furnaces have been retrofitted into hybrid or all-electric systems. The job usually involves diagnosing the reversing valve, outdoor coil, refrigerant charge, or the defrost controls that keep the outdoor unit from freezing on cold canyon mornings. A typical heat pump repair in Los Gatos runs $150 – $650, with most diagnostic calls falling between $150 and $400.
Hillside homes present a unique heat pump challenge. A unit installed at 900 feet on a shaded lot behaves differently than an identical unit at 1,400 feet on an exposed south slope. The load calculation matters. We run it before swapping parts, because a heat pump that short-cycles at elevation may simply be oversized for the actual heating load.
Reversing Valve and Defrost Issues
A stuck reversing valve leaves a Los Gatos homeowner with a heat pump that blows cold air in winter or hot air in summer. The fix is often a failed solenoid coil, not the valve itself. On defrost failures, the outdoor coil ices over and the system drops into a safety lockout. Both repairs are common in Los Gatos because marine fog and redwood shade create exactly the conditions that stress these components.
Mini Split Heat Pump Repairs
Mini splits are common in Los Gatos additions and hillside rooms where running ductwork would tear up a hillside or compromise a roofline. Repairs tend to involve refrigerant leaks at flare fittings, clogged condensate lines, or failed inverter boards. The cost stays in the same $150 – $650 band, and we stock common LG, Mitsubishi, and Daikin parts locally so a Los Gatos repair does not wait on a warehouse in another state.
One more note on mini splits: when one fails in a Los Gatos home, it is usually because the outdoor unit sits in a redwood-duff corner where condensate backs up and the drain pan overflows. We clear it, test the float switch, and treat the drain line so it does not repeat. That is the kind of detail that keeps a repair from becoming a callback.
Heating Repair in Los Gatos
Heating repair in Los Gatos covers the full range of forced-air furnaces, from 1970s single-stage units to modern two-stage and modulating systems. The work starts with a diagnostic call, $150 – $400, and the written estimate tells you exactly what a blower motor, ignitor, gas valve, or heat exchanger replacement will cost before you approve anything. No one gets a surprise at the door.
The housing stock here drives the failure patterns. A closet-installed furnace in a Los Gatos condo or a hillside split-level struggles with return-air clearance. A rooftop package unit on a flat-roof addition, common in the downtown Craftsman remodels, takes weather differently than a garage-installed unit in Campbell. We know what to look for based on where the system lives, not just what the error code says.
Ignitor and Gas Valve Repairs
When a Los Gatos furnace fires up and shuts down in five seconds, the ignitor or flame sensor is usually the culprit. An ignitor replacement runs $150 – $280, parts and labor included, and it is a same-visit fix most of the time. Gas valve replacement is less common but runs $200 – $400 and must be done by a licensed technician. Both repairs are covered by the 365-day guarantee, in writing.
Closet Furnace Overheating
A closet-installed furnace with zero return-air clearance will overheat and trip the limit switch. We see it often in Los Gatos condos and 1980s hillside builds where the mechanical closet was designed for a furnace half the size of the one currently installed. The fix may involve reworking the return-air path or installing a transfer grille, not just resetting the limit. That is real heating repair, not a band-aid.
Trusted Brands We Service in Los Gatos
We work on furnaces and heat pumps from Trane, Lennox, Goodman, and Rheem, as well as Carrier, Bryant, York, Daikin, and American Standard. Our techs are trained by the manufacturers on current diagnostic procedures, not just reading error codes from a phone. We keep common parts for these brands stocked locally, which means a Los Gatos repair gets done faster and the price stays honest. Whether your furnace is a 1998 Goodman or a 2021 Trane two-stage, the tech who arrives has worked on it before. The written guarantee covers the repair, not the brand, so the coverage is the same no matter what is in your mechanical closet.
See our Furnace Repair team’s full brand coverage and diagnostic process.
See the difference
Before
After
Before
After
Before
AfterCommon Furnace Repair Problems We See in Los Gatos Homes
- Short-cycling on hillside microclimates: A furnace that runs fine at night but short-cycles on a hot afternoon is often oversized for the actual load, especially when the lot drops into a redwood-shaded canyon. We run a load calculation before replacing any part, because the wrong fix just moves the problem to another component.
- Closet-installed furnace limit trips: Canyon fog rolls in, the thermostat overshoots, and the furnace overheats because there is no return-air clearance in the closet. This is a design problem that shows up as a repair symptom, and we fix the airflow path, not just the limit switch.
- Rooftop package unit condensate backups: Redwood duff and hillside debris clog condensate drains on flat-roof additions, backing water into the heat exchanger during cold mornings. We clear the drain, test the float switch, and treat the line.
- Hillside split-level static pressure spikes: Undersized returns in upper-zone ductwork cause the old single-stage blower to short-cycle and eventually fail. We diagnose with a static pressure test, then rebalance or retrofit as needed.
Pricing for Furnace Repair in Los Gatos, CA
Here is what furnace repair actually costs in Los Gatos. The diagnostic labor charge is $150 – $400. A blower motor replacement runs $300 – $700. Capacitor test and replacement is $150 – $250. These are the numbers we quote, and they are the numbers you pay. The written price comes before any work begins, and it does not change at the door.
| Furnace Repair Item | Los Gatos Price Range |
|---|---|
| Labor + diagnostic | $150 – $400 |
| Blower motor replacement | $300 – $700 |
| Capacitor test & replacement | $150 – $250 |
Your estimate is free. Call (669) 800-4179, describe what the furnace is doing, and we will give you a written range before we schedule. If the repair fails within 365 days, we return and fix it at no charge.
We worked on a mid-century ranch up in the Kennedy Road hills where the furnace blower motor was intermittently stalling due to a failing capacitor. Our tech used a five-minute capacitor test to catch it before the compressor paid the price, then recharged the refrigerant and recalibrated the thermostat for two zones. The result: stable heat on the lower split-level, balanced static pressure, and a quieter cycle within earshot of the neighbor’s hillside deck.
We Also Serve Cities Near Los Gatos
Our Los Gatos crews also cover Furnace Repair in Los Gatos and the surrounding communities, including Saratoga, Campbell, Cupertino, and Santa Clara. If you live in the hills above Saratoga or a flat-lot rancher in Campbell, the same written pricing and 365-day guarantee apply. Call (669) 800-4179 and a live person answers.
Serving Los Gatos, CA - Our Local Coverage Area
We’re based in the Los Gatos area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Furnace Repair in Los Gatos
The furnace is sized for the coldest night but not the warm afternoon, which means it reaches the thermostat setpoint too quickly on a hot day and shuts off before finishing a full cycle. In the Los Gatos hills, a home shaded by redwoods at 700 feet may need a different load than one on an exposed ridge at 1,300 feet. We run a load calculation and often find the furnace was oversized from the start, or that two zones were added without rebalancing. Short-cycling is a symptom, not a diagnosis, and the fix depends on what the calculation shows. Call (669) 800-4179 for a free estimate on a load-check visit.
Most furnace repairs in Los Gatos do not require a permit. Replacing a furnace, adding zones, or relocating a unit may, depending on the scope and the town’s current building codes for hillside properties. We handle permits when they are required. Repairs like ignitor, capacitor, gas valve, or blower motor replacement are typically completed the same day with no permitting required. Call (669) 800-4179 and we will tell you up front whether your specific job needs one.
Yes. The noise usually comes from static pressure spikes caused by undersized returns or a blower motor laboring against restricted airflow. In a hillside split-level, the upper zone often has a shared duct run that creates a whistle or hum when the furnace ramps up. We run a static pressure test, then rebalance, add a return, or replace the blower with a variable-speed model as needed. The fix is specific to your duct layout, not a generic sound-dampening blanket. Call (669) 800-4179 to schedule a diagnostic.
It does not. When a heat pump is retrofitted onto an older furnace or air handler, the system receives a new combined efficiency rating that reflects the matched pair, not the original furnace alone. In Los Gatos, where many homes have been extensively remodeled with new heat pumps tied to old ductwork, the efficiency on paper rarely matches real-world performance. We check the AHRI match, the duct leakage, and the static pressure before quoting a repair or replacement. Call (669) 800-4179 for a free estimate and we will give you the real numbers.
Yes, and it is a common fix in Los Gatos. A multi-zone mini split system can heat and cool individual rooms without touching the existing ducts, which matters when a hillside home has limited attic or crawlspace access. The repair cost stays in the $150 – $650 range for most mini split issues, while a full replacement runs $3,500 – $7,500 depending on the number of zones and the brand. We will give you a written price for either path before any work begins. Call (669) 800-4179 for a free estimate.
Written by Victor Mancini, Owner at Cold Harbour Heating and Air San Jose, serving Los Gatos since 2003.