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 Redwood City, CA
Coldharbour Heating & Air handles HVAC work across Redwood City with a focus on the homes and conditions that actually exist here: mid-century ranches with original ductwork, hillside houses with cramped crawlspace furnaces, and newer builds that need precise zoning from day one. The peninsula’s mix of fog, bay breeze, and summer heat means two houses three blocks apart can have genuinely different cooling needs, so we size and repair for the specific microclimate, never a one-size-fits-all guess. Each of our Redwood City services has its own page with detailed pricing and job specifics, linked just below. If your system is down now, call (669) 800-4179 and a live person will answer.
Why Redwood City Homes Are Different
Redwood City’s housing stock is a study in contrasts. We work on early-20th-century bungalows near downtown, mid-century ranch and split-level homes in neighborhoods like Roosevelt and Stambaugh-Heller, and dense newer infill near the Caltrain corridor. The older homes share a recurring issue: original undersized ductwork that was never designed for central air, paired with a furnace closet or crawlspace too tight for modern equipment. Hillside homes around Emerald Hills and Farm Hill are often set on pier-and-grade-beam foundations, which means horizontal furnaces tucked into low crawlspaces where a filter change requires belly-crawling under the house. The payback for Redwood City’s famous “Climate Best by Government Test” microclimates is that low humidity reduces latent cooling load, but it also makes poor air sealing impossible to ignore: a leaky return duct on a 78-degree afternoon will pull warm, dusty attic air straight into your living room. We check for exactly that, because it changes what a repair or replacement should actually address.
Styles & brands we work with
Our Main Redwood City Services
AC Repair in Redwood City
When a Redwood City air conditioner quits in July, the failure is often specific to the local setup: plugged condensate lines from dry dust, refrigerant lost at a flare fitting on a 20-year-old Carrier or Lennox unit, or a capacitor degraded by years of cycling between cool marine nights and hot afternoons. We diagnose the exact cause, hand you a written price before any tool comes out, and cover the repair for 365 days in writing. The full breakdown for this service, including response times and the exact jobs we see most, is on the AC Repair in Redwood City page.
Furnace Repair in Redwood City
Redwood City winters are mild but damp, so most furnace failures we see are less about cold stress and more about neglect: rusted igniters, dirty flame sensors from months of sitting idle, and blower motors bound up with household dust. In hillside homes, the furnace often lives in a crawlspace where condensation accelerates rust on controls and wiring. We repair the actual fault, show you what failed, and guarantee the work in writing for a full year. The detailed scope for Redwood City furnace work is on the Furnace Repair in Redwood City page.
AC Installation in Redwood City
Installing air conditioning in Redwood City means navigating what exists: a mid-century ranch with no central air and 60-year-old ducts, a hillside home with no attic to speak of, or a newer townhome where an HOA requires a specific condenser placement. We size the system to the home’s actual heat gain, propose equipment from brands like Trane, Goodman, or Rheem, and provide a fixed written price with a set install date before any work begins. The full process, including what we look for in ductwork and zoning, is on the AC Installation in Redwood City page.
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 Redwood City
Our technicians are trained to work on nine major residential brands, including Carrier, Lennox, Goodman, Rheem, and Trane. We carry common parts, filters, and capacitors in our fully stocked trucks, so most Redwood City repairs are completed in a single visit rather than waiting for parts to ship. For a complete list, see our brands page.
See the difference
Before
After
Before
After
Before
AfterPricing for HVAC Company in Redwood City, CA
| Service | Typical range in Redwood City |
|---|---|
| AC repair | $150 – $650 |
| AC refrigerant recharge (topping off the cooling fluid) | $150 – $650 |
| AC capacitor replacement (the component that starts the compressor) | $150 – $650 |
| AC condensate line clearing (the drain that removes condensation) | $150 – $650 |
| Furnace repair | $150 – $700 |
| Furnace igniter replacement (the part that lights the burner) | $150 – $700 |
| Furnace flame sensor cleaning or replacement (confirms the flame is lit) | $150 – $700 |
| Furnace blower motor repair | $150 – $700 |
| AC installation | $3,500 – $7,500 |
| AC tune-up (annual maintenance visit) | $80 – $200 |
Prices in Redwood City tend to move toward the higher end of these ranges when the job is in a hillside crawlspace, requires navigating an HOA’s equipment-placement rules, or involves opening a finished ceiling to reach aging ductwork. Whatever the final number is, it appears in writing before a tool is picked up, and it does not change at the door.
Neighborhoods We Serve in Redwood City
We dispatch throughout the city and the immediate area. Most Redwood City calls can be scheduled the same day, or if it’s an emergency, get a live person on the phone and we’ll respond as fast as the job allows.
- Downtown Redwood City
- Roosevelt
- Stambaugh-Heller
- Woodside Plaza
- Emerald Hills
Service Area – Cities Near Redwood City
Beyond Redwood City, our dispatchers route local crews to nearby communities on the Peninsula. You’ll often find us working just up or down the road in Menlo Park, CA, Palo Alto, CA, Stanford, CA, and Los Altos, CA.
Serving Redwood City, CA - Our Local Coverage Area
We’re based in the Redwood City 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 Redwood City
Most Redwood City calls are scheduled the same day, and emergency calls are answered by a live person around the clock. When you call, the dispatcher gives you a firm arrival window before ending the call.
Some of the newer townhome and condo associations in Redwood City do have written rules about condenser placement, noise, or screen enclosures. We handle the applicable HOA coordination before installation day so the work doesn’t stall mid-project.
Yes. We serve the full city, including the flats, the hills, and the areas near the San Mateo County line. Call (669) 800-4179 and confirm your street with the dispatcher; if you’re in Redwood City, we’re there.
If your furnace won’t light, your AC won’t cool, or you’re ready for a new system, call (669) 800-4179 today for a free estimate. A live person answers, the price comes in writing, and the work is guaranteed for a full year.
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 Redwood City 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