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 estimateHVAC Company in Los Altos, CA
Coldharbour Heating & Air handles heating and cooling work in Los Altos, a city where many homes were built decades before central air was standard. We work on sprawling ranch houses with original ductwork, 100-amp electrical panels, and mature landscaping that nobody wants torn up. Whether you need AC repair, furnace repair, or a full AC installation, each job gets a written price before any work starts. Call (669) 800-4179 and a live person answers, day or night.
Why Los Altos Homes Are Different
Los Altos isn’t a tract-home city. The housing stock is dominated by single-family ranch and split-level homes from the 1950s through the 1970s, many in the 2,500 to 4,000 square foot range on oversized lots. That changes the work. Original ducts were often sized for heating only, so adding cooling means more than dropping in a condenser. The airflow has to be rebalanced, returns added, and sometimes entire trunk lines replaced.
Summer heat waves push temperatures past 90°F, and homeowners here expect the whole house to hold 74°F without hot spots. Older systems can’t always do that. We also run into a Los Altos-specific issue: homes built before 1975 sometimes have asbestos-wrapped ducts in the crawlspace. Our technicians follow strict abatement protocols rather than disturbing those materials, and in many cases we recommend duct replacement over cleaning. The work has to be done carefully, under the house, without damaging the hardwood floors above.
Styles & brands we work with
Our Main Los Altos Services
Two things keep Los Altos homeowners up at night: an air conditioner that quits during a heat wave, and a furnace that won’t reliably start on a cold December morning. Both are covered here, along with full system replacement.
AC Repair in Los Altos
Most AC failures in Los Altos trace back to the same culprits: capacitor failures, refrigerant leaks on systems over 12 years old, and evaporator coils that freeze because airflow was never right in the first place. On ranch homes with original duct sizing, the compressor can run itself to death trying to push air through undersized returns. Our technicians test airflow, not just refrigerant pressure, before recommending a fix. AC Repair in Los Altos covers the full repair process and what a capacitor, recharge, or coil replacement should cost.
Furnace Repair in Los Altos
Los Altos furnaces are often older than the families living in the house. Many are original to the home, and they show it: cracked heat exchangers, failing igniters, blower motors that rattle on startup. A furnace that hasn’t been serviced in years can cycle off and on unpredictably, which drives up gas bills and wears out components faster. Furnace Repair in Los Altos walks through the most common fixes and what each one costs.
AC Installation in Los Altos
Installing central air in a Los Altos ranch home is not a one-day job. We’re typically adding a condenser, evaporator coil, line set, and new electrical circuit while working around existing ducts that may need modification. Many of these houses also require a panel upgrade before the system can pass inspection. The work is done with the home’s landscaping and architectural character in mind, not just dropped in. AC Installation in Los Altos explains the full process, from load calculation to final inspection.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Brands We Service in Los Altos
Our technicians are trained to service nine major residential HVAC brands, so the unit already in your Los Altos home is one we can work on. We commonly handle Trane, Lennox, Goodman, and Rheem systems in this area. Most common parts, including capacitors, contactors, igniters, and control boards, are stocked on our vans. See our brands for the full list.
See the difference
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After
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After
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AfterPricing for HVAC Company in Los Altos, CA
| Service | Typical range in Los Altos |
|---|---|
| AC repair | $150 – $650 |
| Furnace repair | $150 – $700 |
| AC installation | $3,500 – $7,500 |
| Tune-up | $80 – $200 |
| Capacitor replacement | $150 – $300 |
| Igniter replacement | $150 – $280 |
| Refrigerant recharge | $180 – $450 |
| Condenser fan motor | $250 – $500 |
| Evaporator coil replacement | $600 – $1,800 |
| Thermostat replacement | $120 – $300 |
| Ductwork modification (per run) | $200 – $600 |
| Heat pump conversion | $4,500 – $7,500 |
Prices in Los Altos trend toward the middle and top of these ranges because older homes need more prep work: panel upgrades, duct modifications, and careful handling of crawlspace materials. Whatever the job, you get a written price before any tool comes out. That number does not change at the door, and it includes the 365-Day Done Right Promise in writing.
Neighborhoods We Serve in Los Altos
We work across all of Los Altos, from the flat streets near downtown to the hillside properties that back up against the open space. Our dispatch keeps response times tight throughout the city, typically within two hours for emergency calls.
- North Los Altos
- South Los Altos
- Los Altos Hills
- The Highlands
- Country Club area
Service Area – Cities Near Los Altos
Coldharbour Heating & Air serves Los Altos and the surrounding communities. If you have family or a rental property nearby, we cover Mountain View, CA, Stanford, CA, Palo Alto, CA, and Menlo Park, CA as well. Scheduling is coordinated from the brand’s San Francisco Bay Area office, with crews dispatched locally to Los Altos.
Serving Los Altos, CA - Our Local Coverage Area
We’re based in the Los Altos 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 HVAC Company in Los Altos
Most emergency calls in Los Altos get a technician on site within two hours. A live person answers the phone 24 hours a day, so you’re not leaving a voicemail and hoping for a callback. Call (669) 800-4179 and we’ll give you a firm arrival window.
Most AC installations and many furnace replacements in Los Altos require a permit, and the city’s building department enforces energy efficiency standards. We handle the permit paperwork as part of the installation. Repairs and tune-ups typically don’t need one.
Every repair comes with the 365-Day Done Right Promise in writing. If the same failure happens within a full year, we come back and correct the work at no charge. No argument, no additional invoice. Call (669) 800-4179 to schedule the follow-up visit.
What happens when you call
- 1A real person answersNo phone trees - talk to a local hvac pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Los Altos Customers Say
"Our upstairs never cooled right. He found the duct run was half blocked and the system low on charge, fixed both, and now the whole house is even. Explained every step."
- Deanna Boleyn"New AC and furnace. They gave me a written quote with a couple of options and no pressure. Showed up on the day they promised and the new system is so much quieter."
- Gloria Dunn"New mini split for the addition. Clean install, on time two days running, and the price matched the written quote to the dollar."
- Yvonne Prewitt