Longmont, CO's Trusted Hvac Team — We Show Up and Get It Done
Your HVAC system runs hard. When it fails, the discomfort is immediate. HVAC Repair CO's licensed technicians reach Longmont fast, carrying the most common replacement parts on every truck so most repairs close on the first visit.
Licensed & Insured
Same-Day Dispatch
Flat-Rate Pricing
All Brands Serviced
Who We Are
Built Around One Thing — Reliable Hvac in Longmont, CO
Homeowners and commercial property managers across Longmont call HVAC Repair CO because we don't overpromise. We scope the problem, quote the fix, and get it done. Our trucks carry the refrigerant, capacitors, contactors, belts, and control boards to handle the calls we get every day — which means fewer return visits and faster relief for you.
Our service area covers Longmont and the surrounding region, and our dispatch team answers live around the clock. Call at 2 a.m. with a failed heat exchanger, you'll hear a real person — not a machine — and have a technician rolling within the hour on most emergency calls.
24/7Live Dispatch
AllBrands Serviced
1stVisit Fix Rate
Don't Ignore These
Eight Symptoms That Mean Your System Needs a Technician
Your system will tell you when something's wrong. Here's what to listen and look for — and what each symptom typically means.
System Blows Warm Instead of Cold
Warm air from a running AC system almost always means a refrigerant issue or compressor failure — both require a certified HVAC tech, not a DIY fix.
Short-Cycling — Unit Clicks On and Off Repeatedly
Short-cycling wears out your compressor faster than almost any other operating condition. Common causes include an oversized unit, a dirty evaporator coil, refrigerant issues, or a faulty thermostat — a tech can narrow it down in one visit.
Unusual Noises — Banging, Screeching, or Rattling
Banging usually points to a loose or broken component inside the compressor. Screeching means a failing motor bearing or blower belt. Rattling often signals loose sheet metal or debris in the unit. None of these improve on their own.
Skyrocketing Energy Bills Without Explanation
A sudden jump in electricity bills without a change in usage patterns almost always means your system is losing efficiency — dirty coils, low refrigerant, clogged filters, or a struggling compressor all cause the unit to run longer cycles and burn more power.
Puddles, Ice, or Oily Residue Near Your System
Ice on refrigerant lines or the evaporator coil indicates airflow restriction or refrigerant undercharge. Oily residue near line sets or connections signals a refrigerant leak — which is both an environmental issue and a system killer.
Some Rooms Too Hot, Others Too Cold
If you're stacking box fans in the hottest room, you likely have a distribution problem — not necessarily a broken unit. Our technicians run full system assessments, not just unit checks.
What We Do
From Emergency Repairs to New Installations — HVAC Repair CO Does It All
One call to HVAC Repair CO handles repairs, installations, maintenance, and indoor air quality — so you're not managing three different contractors for one building.
When Your System Fails After Hours — We're Already Rolling
When a system fails completely, the cost of waiting can run well beyond the repair itself — in discomfort, in pipe freeze risk, or in spoiled refrigerated inventory for commercial properties. Our emergency HVAC team covers Longmont around the clock precisely because some problems can't hold until morning.
Compressor and contactor replacement
Refrigerant recharge and leak location
Capacitor and motor replacement
Control board diagnostics and repair
Heat exchanger inspection and emergency heat setup
HVAC Installation in Longmont — Load Calculations, Not Guesswork
A system that's the wrong size for your home will never perform correctly — regardless of brand. It'll either short-cycle (oversized) or run continuously without hitting the set temperature (undersized). HVAC Repair CO runs Manual J load calculations on every installation to determine the exact BTU capacity your home or building requires before we recommend any equipment. We carry and install Carrier, Trane, Lennox, Goodman, Rheem, and York systems — and we'll tell you honestly which tier makes sense for your situation.
Manual J load calculation — every job
Central AC, heat pump, and gas furnace systems
Ductless mini-split installation (single and multi-zone)
Air handler and coil replacement
Ductwork modification and sealing
Post-install commissioning and airflow verification
Tune-Up and Maintenance Plans That Keep Systems Running Efficiently
The most expensive HVAC repair is usually the one that could have been caught in a $150 tune-up six months earlier. Compressor failure after years of low refrigerant, a cracked heat exchanger that ran all winter, a coil choked with three years of debris — these are all maintenance-failure stories. HVAC Repair CO's seasonal maintenance visits include a full-system inspection and performance test, not just a filter swap.
Refrigerant pressure and charge verification
Coil cleaning — evaporator and condenser
Electrical connection inspection and torque check
Blower motor amp draw and belt inspection
Thermostat calibration and control check
Condensate drain cleaning and flush
Full operating performance report after each visit
Commercial properties in Longmont face IAQ challenges at scale — higher occupancy, more CO₂ buildup, stricter ASHRAE ventilation requirements. We assess, spec, and install commercial-grade IAQ solutions that integrate directly with your existing air handling equipment.
Rooftop Units, VAV Systems, and Commercial Refrigeration in Longmont, CO
A commercial HVAC failure isn't just uncomfortable — it closes operations, violates health codes, and costs money every hour it's unresolved. HVAC Repair CO's commercial technicians are trained on rooftop package units, split systems, variable air volume (VAV) systems, chilled-water systems, and commercial kitchen refrigeration across all major manufacturers including Daikin, York, Trane, Carrier, and Lennox.
Rooftop package unit (RTU) service and replacement
VAV box, damper, and AHU repair
Chilled water system maintenance
Building automation system (BAS) integration
Commercial refrigeration service
Planned maintenance contracts for multi-site accounts
We designed this process around the complaints we hear most often about HVAC companies. Vague schedules, surprise charges, and technicians who don't have the right parts — we built against all of it.
1
Call and Connect — Live Dispatch, No Bots
Our dispatchers are trained to ask the right questions upfront so the technician arrives with the likely parts already on the truck — cutting your repair time significantly.
2
Technician Dispatch — Tracked ETA Provided
The nearest available licensed technician gets routed to you. You'll get an arrival window — typically one to two hours on standard calls, often under one hour on confirmed emergencies in Longmont.
3
Diagnosis and Flat-Rate Quote — Before Any Work Starts
Your technician runs a full diagnostic — not just the symptom that called you, but the whole system. You get a flat-rate quote before any repair begins. No work starts until you say so.
4
We Fix It, Test It, and Walk You Through What Changed
You sign off only when the system is running to your satisfaction. We leave the site clean, and our work carries a written labor warranty.
Why HVAC Repair CO
Concrete Reasons Longmont Homeowners Keep Calling Us Back
Every HVAC company in Longmont claims to be reliable and affordable. Here's what we actually do differently — and how you can verify it.
NATE-Certified Technicians on Every Call
We don't send apprentices solo or dispatch people who aren't certified. When a HVAC Repair CO truck pulls up, the person getting out of it is qualified to diagnose and fix the system — not just describe what's wrong and quote a replacement.
Flat-Rate Pricing — Locked Before Work Starts
Parts markups are included. Labor is included. There are no fuel surcharges, no disposal fees added at invoice, and no "miscellaneous materials" line. The quote is the bill.
Fully Stocked Trucks — Most Repairs Done on Visit One
For most standard repairs in Longmont, the part is already on the truck. That means your system is running again the same day, not after a parts-order waiting period.
Written Labor Warranty — Every Repair
If a repair we complete fails again within the warranty period due to our workmanship, we come back and correct it at no charge. This is in writing on every invoice — not a verbal assurance you can't enforce.
No High-Pressure Sales Tactics
Our business runs on repeat calls and referrals, not one-time replacement sales. That changes how we think about every recommendation we make in Longmont homes.
Commercial and Residential — One Company
Property managers and building owners in Longmont, CO often need a single HVAC contractor who can handle residential units in one building and commercial RTUs in another. HVAC Repair CO fields both — with technicians who are specifically trained for each setting, not cross-assigned out of convenience.
Our Commitment
What We Stand Behind When We Leave Your Property
We also guarantee the diagnostic accuracy of every service call. If we recommend a repair and after completing it the root cause turns out to be something different, we don't bill you for the additional correction — that's our diagnostic error, not yours.
We stand behind the equipment we install, the refrigerant charge we set, the electrical work we complete, and every system we leave running. That's what it means to put our name on the work.
What Longmont, CO Homeowners Say After Calling HVAC Repair CO
★★★★★
Called at midnight because the AC went out and we had family visiting. The dispatcher answered immediately, and a tech was at my door in under 45 minutes. Turned out to be a failed run capacitor — he had the part on the truck, swapped it out, and we were cool again by 1:30 a.m. Charged exactly what he quoted before touching it. That's how it should work every time.
DM
David M.
Longmont, CO — Emergency AC Repair
★★★★★
Three HVAC companies told me I needed a full system replacement. HVAC Repair CO's tech ran an actual diagnostic, found a cracked secondary heat exchanger in the furnace, and replaced the heat exchanger assembly. Cost me a fraction of what the others quoted for a new system, and the furnace has run perfectly since. Glad I got a second — well, fourth — opinion.
KR
Karen R.
Longmont, CO — Furnace Repair (Avoided Replacement)
★★★★★
Running a multi-unit building, HVAC downtime directly impacts tenant satisfaction. HVAC Repair CO's maintenance plan cut our reactive calls significantly — and when something does come up, they prioritize our properties. Responsive, professional, and they know the units by now.
The installation crew was thorough and clean. They ran new refrigerant lines, fixed a duct branch that had been improperly sized, and spent an hour walking me through the new thermostat setup. One of the few contractors I've had who left a space cleaner than they found it.
SL
Sandra L.
Longmont, CO — New System Installation
★★★★★
Restaurant kitchen with a walk-in cooler issue — called HVAC Repair CO on a Saturday and they sent a commercial tech, not a residential guy. He understood the equipment, had the right gauges, and fixed the refrigerant leak and faulty expansion valve the same day. Saved us from spoiling an entire inventory worth of product. Worth every penny.
Our office building runs Trane VAV units on every floor. HVAC Repair CO maintains the whole building under contract — quarterly inspections, filter changes, and one emergency response per quarter included. The system has been more reliable than it's been in five years, and when we had a zone controller fail last winter, they were on-site within two hours and had it resolved same day.
Emergency dispatch runs 24/7, including weekends and holidays. Most Longmont emergency calls see a technician arrive within one to two hours. Our dispatcher will tell you the realistic ETA when you call — not a best-case guess.
Yes. Our technicians are trained on all major residential and commercial HVAC brands including Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Mitsubishi, LG, Bosch, Bryant, Amana, and Heil. We carry parts specific to the most common brands — which means less waiting for special-order components on the majority of calls in Longmont.
No fuel surcharges, no disposal fees added at the end, no "miscellaneous materials" charges. What you approve is what you pay. Diagnostic fees are typically waived when you proceed with the repair. Call us to confirm current diagnostic visit rates for Longmont.
The most useful framework is the 5,000 rule: multiply the system's age (in years) by the estimated repair cost. If the result exceeds $5,000, replacement is usually the better financial decision. If it's under $5,000, repair tends to make sense — unless the system has a history of repeated failures or a known terminal issue like a cracked heat exchanger or seized compressor.
Current federal minimum SEER2 standards vary by region. In warmer climates, minimums run higher because cooling load drives annual energy costs more significantly. A SEER2-compliant base-tier system offers a solid efficiency floor for budget-conscious buyers; mid-tier 16–18 SEER2 systems offer meaningful energy savings that can offset the cost difference within 5–7 years in Longmont, CO's climate; high-efficiency 20+ SEER2 variable-speed systems are most appropriate for high-usage climates or homeowners planning long-term occupancy.
Minimum: once per year, ideally before your peak demand season. In Longmont, CO's climate, spring tune-ups before cooling season are the most important single maintenance interval — catching low refrigerant, dirty coils, and electrical issues before July prevents the majority of summer emergency calls. Two visits per year (spring and fall) are ideal for systems running both heating and cooling cycles heavily.
No — and this is worth understanding. Refrigerant handling requires EPA 608 certification, and purchasing refrigerant in quantities sufficient for a system recharge requires certification. Beyond legality, adding refrigerant to a system without first finding and repairing the leak is like adding oil to an engine with a broken seal — it buys you time but doesn't solve the problem.
Yes. We work with financing partners to offer installment plans on new equipment installations. Terms vary based on credit profile and equipment type — ask your technician or call our office at +1-844-611-2875 to discuss options before your installation date. Many customers find the monthly payment on a new high-efficiency system comparable to what they were spending on repeated repairs plus elevated utility bills from an inefficient unit.
Our labor warranty covers the specific failure mode we repaired. If the repair we performed fails again within the warranty period due to our workmanship — incorrect installation, missed secondary cause, improper part application — we return and correct it at no labor charge. Parts carry their own manufacturer warranties, which run separately and are registered on your behalf for qualifying equipment.
Common ductwork indicators: significant temperature variation between rooms with no zoning explanation, rooms that never get comfortable regardless of thermostat setting, visible gaps or disconnected sections in accessible attic or crawl space runs, unusually high utility bills relative to system age, or noticeable air quality issues like excessive dust near supply registers.
If you'd like proof of insurance or license numbers before service, we're happy to provide both. Call +1-844-611-2875 and ask the dispatcher — it's a routine request and we take it as a positive sign that you're careful about who you let work on your home.
Where We Work
HVAC Repair CO's Service Footprint in Longmont, CO
HVAC Repair CO serves Longmont and the broader Longmont, CO service area with the same technician pool and dispatch operation. Wherever you are in our coverage zone, you reach the same live dispatcher and get the same flat-rate, licensed service.
Residential coverage includes single-family homes, condos, townhomes, mobile homes, and multi-unit residential buildings throughout Longmont and Longmont, CO. Commercial coverage includes retail, restaurant, office, medical, light industrial, and multi-tenant commercial properties.
