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 Fremont, CA
Fremont’s heating and cooling work is shaped by a truth most Bay Area cities don’t face: the temperature can swing 20°F between the bayside and the inland valleys on the same afternoon. Coldharbour Heating & Air handles that reality every day, repairing and installing systems sized for the specific microclimate your home sits in. Whether it’s an aging furnace in a 1970s Warm Springs rancher or a struggling AC unit in a Glenmoor split-level, the work starts with a written price and ends with a 365-day guarantee. Call (669) 800-4179 and you’ll speak to a live person, any hour of any day.
Why Fremont Homes Are Different
Fremont’s housing stock tells the story of the city’s growth, and that story matters for HVAC. The 1960s through 1980s single-family homes that make up much of the Mission San Jose, Niles, and Irvington districts often still run on original ductwork. Those ducts were sized for furnaces from the Nixon administration, not for modern heat pumps or high-efficiency AC units. Undersized returns are common, which means a new system can struggle even when the equipment itself is fine. Many of these older homes also have slab foundations with attic-mounted furnaces, so a retrofit means working around joists, tight clearances, and decades of accumulated insulation.
Then there’s the climate. Fremont sits at the mouth of Niles Canyon, and the canyon acts like a weather funnel. The bayside side of the city, around Glenmoor and Ardenwood, gets the marine layer and stays mild through July. But Warm Springs and the areas near the hills bake when the inland heat settles in. A system sized for the Mission San Jose district will fall short in a Warm Springs summer, and the reverse is just as wasteful. That’s why dual-fuel systems and properly matched heat pumps are becoming the standard answer in Fremont, where one side of the city needs air conditioning three months before the other side does. In Warm Springs specifically, original 1970s gas furnaces are being replaced with heat pumps at roughly twice the rate of the rest of the city because the afternoon delta breeze simply never arrives there.
Styles & brands we work with
Our Main Fremont Services
Most Fremont homeowners call us for one of two reasons: their air conditioner quit in the middle of a heat wave, or their furnace won’t fire on the first cold night. Both jobs get the same written-price treatment before we open a single tool bag.
AC Repair in Fremont
When an air conditioner fails here, the cause is often tied to the microclimate. In Warm Springs and the eastern hills, we regularly see compressor failures from systems that run hard for months without a break. Closer to the bay, the bigger issue is corrosion on condenser coils from salt air and persistent moisture. Either way, the approach is the same: diagnose the fault, hand you a written price, and fix it same day when parts are available. Common Fremont AC repairs run $150 – $650 depending on the component. Learn more: AC Repair in Fremont.
Furnace Repair in Fremont
Fremont’s older homes have furnaces that have seen a lot of winters, and the failures follow a pattern. Igniters wear out, flame sensors get coated, and draft inducer motors seize after years of start-stop cycling. In attic-mounted units, heat and restricted airflow shorten the lifespan of blower motors well before the furnace itself should go. A repair typically falls between $150 and $700 depending on the part and the furnace brand. We stock common parts for major brands and get same day repairs done on the first visit more often than not. Details: Furnace Repair in Fremont.
AC Installation in Fremont
Replacing an air conditioner in Fremont isn’t a one-size-fits-all calculation. The right size depends on where your house sits relative to the bay, which direction it faces, and whether your ductwork can even handle the machine you need. Homes near Mission Peak get more afternoon sun than homes down by the bay, and that changes the load calculation. A full AC installation in Fremont typically runs $3,500 – $7,500 for the equipment and work, and we give you a fixed written price before any installation begins. See what’s involved: AC Installation in Fremont.
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 Fremont
We work on Trane, Lennox, Goodman, Rheem, and all the other major residential brands Fremont homeowners already have installed. Our trucks carry common replacement parts for most of these systems, and our technicians are trained to diagnose across brands rather than steering you toward one manufacturer. See our brands for the full list.
See the difference
Before
After
Before
After
Before
AfterPricing for HVAC Company in Fremont, CA
| Service | Typical range in Fremont |
|---|---|
| AC repair (minor electrical) | $150 – $300 |
| AC repair (capacitor or contactor) | $185 – $425 |
| AC repair (compressor-related) | $450 – $650 |
| Furnace repair (igniter or flame sensor) | $150 – $300 |
| Furnace repair (blower motor) | $350 – $650 |
| Furnace repair (draft inducer) | $300 – $700 |
| AC installation (entry-level) | $3,500 – $4,500 |
| AC installation (mid-efficiency) | $4,500 – $6,000 |
| AC installation (high-efficiency) | $6,000 – $7,500 |
| Tune-up | $80 – $200 |
What pushes a Fremont job toward the high end of these ranges is usually access. Attic-mounted furnaces and slab-foundation homes mean more labor hours, and older ductwork sometimes needs modification to work with newer equipment. Whatever the number turns out to be, the price is written down and handed to you before any work starts. It does not change at the door.
Neighborhoods We Serve in Fremont
We’re on the road across Fremont every week, from the older tree-lined streets of Niles to the newer developments near BART. Our scheduling covers the entire city with technicians based in the area, and a typical visit is booked within a day for non-emergency work.
- Mission San Jose
- Warm Springs
- Niles
- Irvington
- Glenmoor
- Ardenwood
Service Area – Cities Near Fremont
When Fremont homeowners need coverage that reaches beyond city limits, we handle those calls too. The same written pricing and 365-day guarantee apply in Newark, CA, Union City, CA, Milpitas, CA, and Palo Alto, CA. Dispatch and scheduling are coordinated from our San Francisco Bay Area office, with crews serving Fremont locally.
Serving Fremont, CA - Our Local Coverage Area
We’re based in the Fremont 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 Fremont
For AC failures during a heat wave or furnace breakdowns in cold weather, we prioritize same-day visits whenever possible. Most non-emergency appointments are scheduled within one business day. Call (669) 800-4179 and a live person will give you a specific arrival window, not a voicemail.
Fremont typically requires permits for full system replacements, and some HOAs within the city add their own review process. We handle the permit paperwork as part of the installation and work with your HOA rules where they apply. The written quote includes all permit-related costs up front.
The price is driven by labor hours, not by neighborhood. An attic-mounted furnace in a 1970s Mission San Jose home takes longer to reach than a garage unit in a newer Ardenwood build. Your written price reflects the actual access and time involved for your specific home, and it’s set before any work starts.
Call Coldharbour Heating & Air at (669) 800-4179 for a free estimate on any repair or installation in Fremont. Written pricing, a firm arrival window, and a 365-day guarantee on every repair we make.
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 Fremont 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