(970) 602-4958
HVAC in Denver, CO: two-story colonial home with an outdoor AC condenser

HVAC in Denver, CO

Trusted Heating & Cooling Service in Denver, CO

Serving local homes and businesses with expert air conditioner, furnace, heat pump, and mini-split work.

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Our technicians providing HVAC in Denver, CO

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Local residents trust Longmont HVAC for no-AC and no-heat emergencies because we combine fast arrival times with thorough, professional workmanship.

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Trusted Denver HVAC Service

For Denver residents, Longmont HVAC is the shortcut past every bad HVAC experience you've heard about: the vague quotes, the mystery invoices, the replacement pitch for a system that needed a $40 part. That's not how we work. You talk to a real person, a technician shows up on time, the diagnosis is explained clearly, and the price is agreed before any work begins. From emergency repairs to planned upgrades, all handled by seasoned technicians who know the area.

HVAC technician walking up to a Denver home with his tools
Technicians arrive with the common repair parts already on the truck.

Full-Service HVAC Care for Denver Homes and Businesses

Whether you own a townhouse, a small apartment building, or a commercial space in town, we have the expertise and equipment to handle every heating and cooling need. Our technicians have spent years working on central air conditioners, gas and electric furnaces, heat pumps, and ductless mini-splits across the region, and we understand the climate patterns, housing stock, and local code requirements that shape how systems perform here.

Most homeowners we meet need one of three things: a repair, a replacement, or regular maintenance. Repairs are usually quick: a failed capacitor, a corroded flame sensor, a slow refrigerant leak, or a seized blower motor. When we replace a system, it gets a proper load calculation, not a guess based on the old unit's tonnage, which keeps temperatures even and stops the new equipment from short-cycling itself to an early death. Maintenance visits cover coil cleaning, a refrigerant charge check, safety control testing, and a static pressure reading, and nothing does more to extend the life of your system.

Local businesses get the same care. An overheated storefront or a drafty office drives customers and staff away, so our commercial crews focus on getting to the cause quickly and keep common parts on board for rooftop units, split systems, and ventilation equipment. Property managers, restaurant owners, and retailers can count on us to work around their operating hours whenever possible.

When Your System Fails in Denver

If your system quits, how fast help arrives matters more than anything else. For that reason, we keep scheduling flexible across the area and answer every call with a live person. Emergency calls typically see a technician within a day, and we prioritize no-heat and no-cool calls ahead of routine work.

Here's what we see most often when something breaks at home: an air conditioner blowing warm air, a condenser that hums but won't start, a furnace that ignites and shuts off, a breaker that trips every time the system kicks on, an evaporator coil that has iced over, a condensate drain backed up into the furnace cabinet, or a thermostat that has gone blank. Nearly all of these trace back to parts already on our trucks: capacitors, contactors, igniters, flame sensors, universal control boards, and common fittings. You'll see the price up front, and that's the price you pay.

If your AC has iced over, the most helpful thing you can do before we arrive is switch the system off at the thermostat and set the fan to "on" so the coil can thaw. Running it frozen can flood the drain pan and damage the compressor. If a furnace is short-cycling or you smell something burning, turn it off at the service switch and call (970) 602-4958. A few minutes of caution can head off a much larger repair.

How Denver Homeowners Can Extend HVAC Life

Routine maintenance makes all the difference between a system that lasts and one that quits in the middle of a heat wave. Our advice for homeowners is a short list: fresh filters every one to three months, at least two feet of open space around the outdoor condenser, a spring rinse of the condenser coil, and two professional tune-ups a year, so problems are found while they're still inexpensive.

Age matters too. Most central air conditioners last 12 to 15 years, furnaces 15 to 20, and heat pumps 10 to 15 with regular service. If your system is past that window and starting to struggle, such as climbing utility bills, rooms that never feel comfortable, or a service call every season, a planned replacement is nearly always less expensive and much easier on you than an emergency one in the middle of a cold snap.

Minor issues don't stay minor when they're ignored. Consider a weak capacitor: swapping it out is a quick, inexpensive repair, but left alone for a season, it can burn out the compressor, and just like that a minor fix becomes a full system replacement. That's why we ask homeowners to keep our number in their phone and call at the first hint of trouble. Catching it early saves money and spares you a miserable night.

Common HVAC Problems in Denver

HVAC systems in this area face a familiar set of enemies. Hard-running summers push compressors and capacitors to their limits, and humidity and airborne grit slowly foul outdoor condenser coils, cutting efficiency years before the equipment should show its age. Clogged filters quietly starve systems of airflow, freezing evaporator coils in summer and overheating furnace heat exchangers in winter, damage that builds slowly and out of sight.

Our technicians also run into the full range of component failures in local homes: weak capacitors that leave the condenser humming without starting, contactors with pitted points, cracked igniters and dirty flame sensors that lock furnaces out on cold mornings, slow refrigerant leaks that leave the house lukewarm by afternoon, and blower motors worn down by years of restricted airflow. The area's older housing stock adds its own layer, undersized returns, leaky or crushed ductwork, and additions that no duct run ever reached.

Every one of these problems is fixable, and most are much less expensive when caught early. If your system is doing anything unusual, strange noises, weak airflow, rooms that won't hold temperature, bills creeping upward, a quick diagnostic visit from our team catches the small problem before it becomes a costly breakdown. Give us a call at (970) 602-4958 to set up a visit.

Your Go-To Heating & Air Team

Living and working here gives us firsthand knowledge of what local homes need to stay comfortable. Whether it's an emergency repair or a routine seasonal tune-up, our team has the expertise to address every concern.

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Our Local HVAC Services

We provide a full range of residential and commercial HVAC services to residents across the community, including:

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The Reason Denver Keeps Calling Us

Longmont HVAC treats this community like home turf, because it is. We show up when we say we will, we diagnose before we quote, and we put real numbers on both repair and replacement so you can decide based on facts, not pressure. Our technicians are seasoned on everything from 20-year-old furnaces to inverter heat pumps, our trucks carry the parts that actually fail, and our work is checked in every mode before we go. It's the reason so much of our local work comes from referrals.

Technician explaining thermostat settings to a homeowner in Denver, CO

HVAC FAQ for Local Residents

The brand rarely matters to us. Our technicians regularly service Carrier, Trane, Lennox, Rheem, Goodman, York, and the other major names you'll find around here. On the ductless side, we see plenty of Mitsubishi, Fujitsu, and LG. Most repairs use universal parts that ride on the truck, and brand-specific components are quick to source when a repair calls for them.
First, rule out the easy stuff. Confirm the thermostat is in cooling mode and the batteries aren't dead, replace the filter if it's dirty, and look at the breakers for the indoor and outdoor units. Ice on the copper lines or an outdoor unit that hums without running means it's time to shut the system off, because continuing to run it risks damaging the compressor. Call us at (970) 602-4958 and we'll send a technician your way without delay.
There isn't one magic number, but a few rules of thumb help. Most component failures on systems under about 10 years old are worth the repair. Past the 15-year mark, or after a compressor or heat exchanger failure at any age, replacing the system usually makes better financial sense, especially with the efficiency gains newer equipment offers. We'll show you both numbers up front and let you decide, because we'd rather earn your trust than sell you a system you don't need yet.
Most calls get a same-day appointment, and a home with no heat or no cooling gets priority over routine work. When you reach us at (970) 602-4958, you'll get a straight arrival window, and because the technician arrives with capacitors, contactors, igniters, and motors already on board, most repairs wrap up in one trip.
Yes. Our seasonal tune-ups clean coils and burners, verify refrigerant charge and combustion, test capacitors and safety controls, and check airflow end to end, with cooling in spring and heating in fall. It's the most reliable way to extend equipment life and avoid a breakdown in the middle of a heat wave or cold snap, and it often pays for itself in energy savings over time.
It depends on the job. Repairs usually come in between $150 and $650, depending on the failed part and the type of system. A complete system replacement generally costs about $5,000 to $12,000 installed, depending on size and efficiency rating. Before any work starts, we provide a written quote based on the diagnostic, and that number doesn't change.
Absolutely. Mini-splits are ideal for additions, garages, sunrooms, and older homes that never had ductwork. We size each zone to the room it serves, position the indoor and outdoor units carefully, and handle the line set, condensate drainage, and electrical connections correctly. If central equipment serves you better, we'll tell you that too.
Yes. We repair every major brand of air conditioners, furnaces, heat pumps, and ductless mini-splits. When a system is beyond saving, we handle the complete replacement: hauling away the old equipment, putting in a correctly sized new system, and testing everything in every mode. You get a clear quote for each option before deciding.

More Areas We Cover

Our technicians work throughout the surrounding region. See the other areas we serve.

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