Coldharbour Heating & Air hvac team

HVAC Company in Half Moon Bay - Fast Local Response, Upfront Pricing

Same-day heating and cooling service with the price agreed before we start, and no overtime surcharge for evenings or weekends. Licensed, insured, EPA-certified technicians.

✓ Licensed & Insured ✓ Written quotes ✓ Permits handled
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We answer around the clock

🛡 Licensed & Insured 📝 Written Fixed-Price Quotes 💲 No Change Orders · Free Estimates
Every visit starts with

Seasonal tune-up and full diagnostic on your Carrier, Trane, or Goodman system - readings shown to you before any repair is proposed

Your new heating and cooling system for as low as $119/month*on approved credit; ask for current terms

Diagnosis first, numbers second - you approve the repair price before a single part goes in.

Styles & brands we work with

AC repair
AC repair
Furnace & heating
Furnace & heating
Heat pumps
Heat pumps
Ductless mini splits
Ductless mini splits
Carrier
Carrier
Trane
Trane
Goodman
Goodman

Before & after – our own jobs

Before - Recent ProjectBeforeAfter - Recent ProjectAfter
Recent Project
Before - Full RestorationBeforeAfter - Full RestorationAfter
Full Restoration
Before - Complete UpgradeBeforeAfter - Complete UpgradeAfter
Complete Upgrade

HVAC Company in Half Moon Bay, CA

Half Moon Bay’s coastal microclimate creates HVAC challenges found almost nowhere else in the Bay Area. The persistent marine layer and salt-laden fog mean we spend far more time protecting equipment from corrosion than sizing for cooling loads. Most calls we field here involve furnace repairs on aging gas systems, ductwork remediation for mold intrusion, or replacing equipment that’s failed years before its inland lifespan. Our technicians are trained on Goodman, Rheem, York, and Daikin systems, and we dispatch from our San Francisco Bay Area office with crews serving Half Moon Bay directly. Call (817) 402-2972 when you need a live person, any hour.

Call (817) 402-2972

Why Half Moon Bay Homes Are Different

The housing stock here tells the story. Frenchman’s Creek and Arleta Park are packed with 1960s-80s tract homes still running original forced-air gas furnaces and ductwork. Older cottages near downtown often rely on wall heaters or lack central systems entirely. California Coastal Commission constraints have kept new construction tight, so most of what we service is decades old.

The climate is the real variable. Half Moon Bay sits in one of Northern California’s most reliably fog-bound pockets. Summer highs hover in the low-to-mid 60s°F, and the marine layer can linger all day, every day. That near-constant moisture and airborne salt coats outdoor equipment in a film that pits aluminum flue collars and uncoated condenser coils within 5-8 years. In San Jose, those same parts last 15-plus. Here, mold intrusion in ductwork and oxidation of heat exchanger flues outrank heat load as failure modes. We specify marine-grade epoxy-coated coils and cupronickel options on any outdoor unit, and we inspect vent termination caps seasonally. Salt-accelerated corrosion at the exhaust collar is a common combustion-safety failure point on those east-side furnaces from the 1970s and 1980s.

Permitting adds another layer. Exterior HVAC installations may need Coastal Commission review on top of standard San Mateo County permits. We build that lead time into every project quote.

Our Main Half Moon Bay Services

Half Moon Bay homeowners call us most often for these three jobs. Each has its own dedicated page with deeper detail on local conditions and pricing.

AC Repair in Half Moon Bay

True AC failures are rare here, but when they happen it’s usually corrosion damage to the outdoor condenser or refrigerant leaks at salt-pitted line sets. More often, “AC” calls turn out to be ductwork issues: the marine layer pushes moisture into aging galvanized ducts, and homeowners notice musty airflow or uneven cooling on the handful of warm afternoons. We test for refrigerant charge, inspect coils for salt pitting, and check duct integrity. Our technician will hand you a written price before touching a tool, and every repair carries our 365-Day Done Right Promise. AC Repair in Half Moon Bay covers typical costs and what to expect.

AC Repair in Half Moon Bay

Furnace Repair in Half Moon Bay

This is where we spend most of our time in Half Moon Bay. Aging gas furnaces in the east-side subdivisions develop cracked heat exchangers from thermal cycling in damp air, and ignition systems corrode faster than the manufacturer predicted. We see failed flame sensors, pitted burner assemblies, and exhaust collars rusted through enough to create CO risk. Safety comes first: if we find a compromised heat exchanger or blocked flue, we’ll show you exactly what we found and explain your options before any work proceeds. Furnace Repair in Half Moon Bay details common fixes and pricing.

Furnace Repair in Half Moon Bay

AC Installation in Half Moon Bay

New cooling systems here are a niche need, but when they’re warranted we size carefully. The cooling load is minimal, so oversizing is a real risk that leads to short-cycling and humidity control problems. We focus on corrosion-resistant outdoor units with marine-grade coatings, and we often recommend heat pump systems that handle the mild heating load efficiently too. Coastal Commission and county permitting means we schedule with realistic timelines, not rushed promises. You’ll get a written fixed price, a set install date, and we’ll handle rebate paperwork if you’re eligible. AC Installation in Half Moon Bay walks through the full process.

AC Installation in Half Moon Bay
Need help today?Fast, friendly service and a no-obligation free estimate.

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What happens when you call

  1. 1
    A real person answersNo phone trees - you reach a local pro.
  2. 2
    You get an upfront price rangeHonest numbers before anyone is dispatched.
  3. 3
    A background-checked tech heads outLicensed & insured, dispatched right away.
  4. 4
    You approve before work beginsNothing starts until you say go.

Brands We Service in Half Moon Bay

Our technicians carry training and common parts for Goodman, Rheem, York, and Daikin systems, plus five additional major brands. We stock igniters, flame sensors, capacitors, and contactors locally so most Half Moon Bay furnace repairs finish same-day. our brands page has the complete list.

Pricing for HVAC Company in Half Moon Bay, CA

Service Typical range in Half Moon Bay
AC Repair (diagnostic to full repair) $150-$650
Furnace Repair (diagnostic to full repair) $150-$700
AC Installation (full system replacement) $3,500-$7,500
Annual Tune-Up (furnace or AC) $80-$200

Half Moon Bay prices trend toward the higher end when corrosion has damaged multiple components or when Coastal Commission review extends the project timeline. What never changes: you’ll get a written price before we start, and that number won’t shift at your door. That’s The Kingswell Way, and it’s how we’ve operated since 2003.

Neighborhoods We Serve in Half Moon Bay

Our crews cover the full city, from the older cottages near Main Street to the hillside tracts east of Highway 1. Most Half Moon Bay calls reach a technician within the same day when you call before noon.

  • Frenchman’s Creek
  • Arleta Park
  • El Granada (border area)
  • Midcoast neighborhoods along Highway 1
  • Downtown Half Moon Bay

Service Area – Cities Near Half Moon Bay

We work throughout the San Mateo County coastal zone. If you’re in El Granada, CA, Burlingame, CA, Millbrae, CA, or even Belmont, MA, our dispatch team coordinates arrival windows from the Bay Area office. Each city has its own conditions, but the same written price, firm arrival window, and 365-Day Done Right Promise apply everywhere we go.

Serving Half Moon Bay, CA - Our Local Coverage Area

We’re based in the Half Moon Bay 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 Half Moon Bay

Ready to get started? Free estimates · 60-minute response in Half Moon Bay
Call (817) 402-2972

What happens when you call

  1. 1
    A real person answersNo phone trees - talk to a local hvac pro.
  2. 2
    You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
  3. 3
    We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
  4. 4
    You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.

What Half Moon Bay Customers Say

★★★★★ 4.8 from 6+ reviews

"Furnace was short cycling all winter. They diagnosed a bad sensor instead of condemning the whole unit like I feared. Cheap fix, honest call."

- Russ Tiedemann

"Thermostat and a weak blower. Fixed both in one visit, explained the guarantee, and didn't leave a mess. I've already recommended them to my neighbor."

- Natalie Esposito

"Honest to a fault. Two companies told me I needed a whole new unit. Coldharbour said mine had years left and just needed a cleaning and a part. Saved me thousands."

- Marcus Reilly

How It Works in Half Moon Bay

Getting your hvac handled is simple and fast.

1

Call or Request a Free Estimate

Tell us about your hvac needs and we provide an upfront, transparent quote - no obligation, no hidden fees.

2

Licensed Technician Dispatched

A background-checked, certified technician arrives in Half Moon Bay - typically within 30-60 minutes, with parts stocked on the truck.

3

Problem Solved, Guaranteed

We complete the job to your full satisfaction, backed by our warranty and 100% satisfaction guarantee.

Current Offers

Bring these savings to your next appointment.

10%

10% Off Your First Service Visit

Valid on your first completed service visit with us.

Expires Mar 31, 2027
Always

Written Price Before Any Work Starts

Expires Mar 31, 2027
Included

Written Guarantee on Every Repair

Expires Mar 31, 2027
Free

Free Second Visit if the Repair Fails

Expires Mar 31, 2027

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Areas We Serve
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