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(970) 602-4958

HVAC in Longmont, CO

Cool in July. Warm in January. Handled.

Whether it's a sudden breakdown or a planned efficiency upgrade, Longmont HVAC has you covered with expert diagnosis, quality installs, and friendly, on-time service.

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Same-Day Appointments Any Make & Model Honest Quotes
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Same-Day & Emergency Service
★★★★★ 4.8 / 5 stars (95+ reviews)
5.0 ★ Average Rating
5,000+ Systems Serviced
Same-Day Service Available
Upfront Pricing
Same-Day Service
Experienced Techs
Heating & Cooling Experts
Local & Family-Owned
Our team of technicians providing HVAC in Longmont, CO
Why Local Matters

Trusted by Local Homeowners

A house with no cooling in summer or no heat in winter can't be put on hold, so we don't. We send experienced technicians out for same-day visits and repairs built around how these systems actually fail in our local homes.

800+Systems Installed
FastResponse
ClearQuotes
Our Services

Every Comfort Problem Under One Roof

One call handles it all. AC repairs, furnace service, heat pumps, mini-splits, duct cleaning, and emergencies, handled by experienced professionals.

AC Installation

New air conditioners sized by load calculation and commissioned properly.

HVAC Repair

One call for any breakdown, heating or cooling, with the fault found and fixed.

Heat Pump Installation

Efficient heat pump installs that heat in winter and cool in summer.

Ductless Mini Split Installation

Mini-splits for the rooms that never get comfortable.

HVAC Replacement

System replacements with proper sizing and a full commissioning test.

Air Duct Cleaning

Cleaner air and better airflow, with the debris actually removed.

Furnace Installation

High-efficiency furnaces sized for your home and vented correctly.

AC Repair

Cold air back fast, with the common parts already on the truck.

HVAC Installation

New HVAC systems, sized, sealed, and commissioned the right way.

HVAC Maintenance

Coils cleaned, charge checked, safeties tested, twice a year.

Furnace Repair

Igniters, flame sensors, blowers, and boards fixed, most in one visit.

Heating Repair

Heating systems of every type repaired and tested before we leave.

Stop searching. Start getting HVAC help.

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4.8/5150 reviews
What Homeowners Call Us For

The Two Repairs We Get Called For Most

When the air conditioning quits or the furnace won't light, you need a technician who finds the real problem and fixes it the same day.

AC Repair in Longmont

Most air conditioner breakdowns trace back to one failed part: a weak capacitor, a burned contactor, a seized fan motor, or a slow refrigerant leak. We diagnose it with gauges and meters, not guesswork. You get a clear price before any work starts, and if the system is old enough that replacement makes more sense, we'll show you both numbers.

  • AC running but blowing warm air
  • Outdoor unit humming but not starting
  • Frozen coil or iced-over lines
  • Water leaking near the indoor unit
AC repair pricing and details

Furnace Repair in Longmont

A furnace that won't light on a cold night can't wait until morning. Most no-heat calls come down to a dirty flame sensor, a failed igniter, or a blower motor, and our trucks carry the common parts to fix them on the spot. We also check for the problems that matter for safety, like a cracked heat exchanger, and give you an upfront price before any work begins.

  • No ignition when the heat calls
  • Short cycling on and off
  • Cold air from the vents in heating mode
  • Loud banging, squealing, or grinding at startup
See how we handle furnace repairs
HVAC Problems We Solve

When Homeowners Should Call for Help

Most failures start small and give you clues first. Below are the warning signs local homeowners run into most, and any one of them is reason enough to call us for a closer look.

AC Blowing Warm Air

When the AC runs but the house won't cool, the fault is almost always one specific component. We find it and fix it fast.

AC repair

Furnace Won't Stay On

Frequent on-off cycling is the furnace protecting itself from a real problem. Ignoring it risks the heat exchanger, the most expensive part in the cabinet.

Furnace repair

Rising Bills, Weak Airflow

Energy bills creeping up while comfort drops means the system is working harder than it should, dirty coils, clogged filters, or failing motors are the usual suspects.

Maintenance & tune-ups

Old System, Repeat Repairs

A system past 12 to 15 years that needs a repair every season is telling you something. We'll give you the honest math on repair versus replacement.

System replacement

Dusty Air & Musty Smells

A musty smell at startup often means moisture in the ducts or a dirty evaporator coil, worth addressing before it becomes a bigger air-quality problem.

Air duct cleaning

Rooms That Never Get Comfortable

Mini-splits deliver precise heating and cooling to a single zone, run whisper-quiet, and sip electricity compared to window units.

Mini-split installation
15+ Years Serving Local Homes
3,000+ Comfort Problems Solved
Same Day Service Available
98% Problems Solved
Why Work With Us

Why Homeowners Trust Us

Fast Appointments

Most repair calls are diagnosed and fixed in a single visit because we stock the common parts, capacitors, contactors, igniters, motors, on every truck.

Skilled Professionals

Every technician has years of hands-on HVAC experience across air conditioners, furnaces, heat pumps, and ductless systems, and trains continually on new models and refrigerants. Your home gets a specialist, not a generalist with a parts catalog.

Repair-First Mindset

Plenty of companies sell a new system the moment yours hiccups. We diagnose first, explain what actually failed, and only recommend replacement when the math genuinely favors it.

Thorough, Lasting Work

Lasting comfort comes from fixing the cause, not the symptom. We find why your system failed and shut that down for good, then back the work with a real guarantee.

About Our Team

Local Experience That Makes a Difference

Year after year, Longmont HVAC has been the team local families call when the AC quits or the furnace goes cold. We've serviced systems in nearly every neighborhood around town, and that track record shapes how we approach each job, from the first diagnostic to the final test.

Every technician on our team is experienced, background-checked, and trained across air conditioners, furnaces, heat pumps, and ductless systems. We build every quote around the system you have and the way you use it. When the furnace goes out, you want a team that can be there fast, not a franchise dispatcher hundreds of miles away.

Ready to Talk to a Local Expert?

Get a price quote from a local team that knows your area.

Call (970) 602-4958
★★★★★ Rated 4.9/5 by local homeowners
HVAC in Longmont, CO: technician arriving for a service call at a home
10+ Years Serving the Area
Upfront Pricing & Quotes
Same-Day Service Available
97% Customer Satisfaction
4 Simple Steps

Our HVAC Service Process

Our 4-step process is designed for accuracy, speed, and zero surprises on the invoice.

Technician going over the diagnosis with a homeowner in Longmont, CO
01

Call Us Anytime

Call (970) 602-4958 and we'll get you a price quote, often within a day. A few quick questions, cooling or heating, what the system is doing, how old it is, and we'll book a time that works for you.

02

Diagnose & Quote

We inspect the whole system, not just the obvious symptom, and give you a straight answer: what failed, why, and what repair versus replacement really costs.

03

Fix It Right

From swapping a contactor to setting a new condenser, every job gets the same standard: right parts, right sizing, right workmanship.

04

Stay Comfortable

The job isn't done until conditioned air is flowing and verified. We'll also show you the simple habits, and offer the maintenance schedule, that add years to the system's life.

Call (970) 602-4958

Upfront pricing · Same-day service available

Fast Response

Why Fast Response Matters in Longmont

The first visit sets the tone. Here's how we respond when you call Longmont HVAC for emergency HVAC service.

The call

Your Call, Our Priority

Our team answers your call promptly, gathers key details, cooling or heating, running or dead, any error codes on the thermostat, and books your visit, often same-day. We'll guide you on switching the system off if it's iced over or short-cycling in the meantime.

Right away

Prompt On-Site Visit

Our experienced technician arrives at your property with a fully stocked truck ready to get started right away. Capacitors, contactors, igniters, and motors are already on board.

The visit

Fault Found, Comfort Restored

This is where the problem actually gets solved. We repair what's repairable immediately, and when replacement is the honest answer, we handle removal, disposal, and a code-compliant install without drama.

Ongoing

Lasting Protection

Lasting comfort is the whole point. We verify the repair, note the system's age and condition, and offer a simple seasonal plan that keeps efficiency up, breakdowns down, and miserable nights off your calendar.

No Heat Right Now?

HVAC systems don't fix themselves. Pick up the phone and we'll line up fast, reliable service before the problem grows.

Call (970) 602-4958
What Clients Say

Real Results, Real Reviews

★★★★★
4.8 out of 5 · 150+ reviews

"Our restaurant's rooftop unit failed on a Friday with a full weekend of reservations booked. Their team had us cooling again before the dinner rush. They clearly understood what downtime costs a Longmont business, and they came back the next week to fully service the second unit. They've got all our locations now."

MT
Marcus T.
Longmont, CO

"From the estimate to the final walkthrough, the whole install was clear and professional. The crew wore shoe covers, put down drop cloths, hauled off the old equipment, and the final bill matched the quote exactly. The new system is so quiet we barely notice it running. I'd send anyone in Longmont their way."

JL
Joan L.
Longmont, CO

"Years of dust, pet hair, and who knows what else came out of our ducts. After the cleaning, the airflow from every vent is noticeably stronger, and my wife's morning allergies have calmed way down. They showed us before-and-after photos of everything they pulled out."

GW
Greg W.
Longmont, CO
Our Commitment

Our Commitment to Longmont Homeowners

Good HVAC service comes down to doing the small things right. These are the commitments that earn Longmont HVAC repeat customers and referrals year after year.

Experienced Technicians

Hands-on experience is the real benchmark for HVAC work. Every technician on our team is a seasoned pro across air conditioners, furnaces, heat pumps, and ductless systems, ensuring your home is serviced according to the highest industry standards.

Right-Sized, Code-Compliant Work

Effective doesn't have to mean oversold. We size systems honestly and install them to code with quality fittings and clean workmanship, so you get reliable comfort with minimal disruption to your household.

Maintenance That Pays for Itself

Our team believes in keeping systems alive with simple, scheduled care. If you want years more from your current equipment, our spring and fall maintenance visits clean coils, verify the charge, and test every safety control. No surprises, no hidden fees. This focus on longevity is one reason we maintain a 4.9-star rating across 150+ reviews.

Service Areas

Proudly Serving Longmont & Beyond

Fast service throughout the metro area. Our technicians are positioned to reach every community we serve quickly.

HVAC Service in Lakewood

Complete HVAC care in Lakewood. Repairs, installations, duct cleaning, and seasonal tune-ups.

Learn more

HVAC Service in Fort Collins

Experienced HVAC technicians serving the Fort Collins area. Upfront pricing and honest recommendations.

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HVAC Service in Aurora

Reliable comfort solutions for Aurora homeowners. From quick repairs to full system replacements and upgrades.

View details

HVAC Service in Denver

Trusted heating and cooling service for Denver homes and businesses. Fast response when the AC or furnace quits.

Learn more

HVAC Service in Greeley

Keeping Greeley comfortable in every season. Diagnose, repair, replace, done right the first time.

View details

HVAC Service in Colorado Springs

Colorado Springs's go-to team for AC repair, furnace service, heat pumps, and mini-splits. Same-day appointments available.

See service area
From Our Blog

HVAC Tips for Longmont Homeowners

Practical advice to keep your home comfortable and your repair bills low.

Homes on a residential street in Longmont, CO

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New AC condenser set on its pad with the line set ready

HVAC Sizing Guide in Longmont, CO

Why bigger isn't better when choosing a new HVAC system. What our technicians tell homeowners every day.

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Old AC condenser on a hand truck beside its replacement

When Is an HVAC System Too Old in Longmont, CO

When is an HVAC system too old to keep repairing? Practical advice from the team that does the work.

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FAQ

Your Questions, Answered

Most air conditioner repairs in Longmont run between $150 and $650, depending on the part. Common fixes like capacitors, contactors, and fan motors sit at the lower end, while compressor and refrigerant work costs more. If the system is beyond economical repair, full replacement typically ranges from $5,000 to $12,000 installed depending on size and efficiency. We diagnose first and give you a clear, upfront quote before any work begins.
A good rule of thumb: if the system is under 10 years old and the fix is a component, capacitor, motor, igniter, sensor, repair usually makes sense. If the compressor or heat exchanger has failed, the unit is past 12 to 15 years old, or repairs are stacking up season after season, replacement is the smarter investment. Our technicians walk you through both numbers honestly so you can decide with real information.
We offer same-day and emergency HVAC service throughout the Longmont area. Our trucks carry the most common parts, capacitors, contactors, igniters, flame sensors, and universal motors, so the majority of repairs are completed in a single visit. Even full system replacements are usually scheduled within days, not weeks.
For many Longmont homes, yes. Modern heat pumps heat and cool from a single system, run far more efficiently than electric resistance heat, and current models perform well even in cold weather. They cost more upfront than a basic AC swap, which is why we run the numbers on your actual usage and utility rates before recommending one.
Yes. Our technicians work on all major residential and commercial brands and system types, central air conditioners, gas and electric furnaces, heat pumps, packaged units, and ductless mini-splits. We carry universal parts on the truck and can source brand-specific components quickly when needed.

Don't Wait for the Weather to Win.

Waiting only makes a failing system worse and the house less livable. Call now and our experienced team can respond fast with upfront pricing.

Call (970) 602-4958 Now
Heating Trouble? Call NowUpfront Pricing, No Obligation