13 AC Repair Contractors in Longmont, CO
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Top-Rated AC Repair Contractors in Longmont
M and M Heating, Cooling, Plumbing and Electrical
“Every reviewer in the sampled set awarded 5 stars, and none of those reviews expressed concerns about pricing or callbacks. Karl Moeller explicitly noted that…”
Welzig Heating, Air, Plumbing & Electric
“All six visible reviews award 5 stars, with three reviewers specifically naming technicians Zach and James while describing repair outcomes. Four reviewers…”
All AC Repair Contractors (13 total)
Blue Valley Heating & Cooling
“1181 reviewers maintain a 4.8-star average, with multiple five-star reviews praising specific technicians by…”
TNT Home Services - Longmont
“Among 864 reviews, the 5-star feedback consistently highlights specific technicians like Craig, Adam, and…”
KJ Thomas Mechanical
“All 252 reviews carry 5-star ratings, with customers consistently praising honest estimates, on-time…”
Colorado's Finest Heating and Air Conditioning
“215 reviews yield a 4.9 average rating, with Jordan mentioned specifically across multiple five-star reviews…”
Carroll Mechanical Services
“All 77 reviewers awarded 4 or 5 stars, with customers specifically praising technician knowledge, transparent…”
Prime Performance Mechanical
“5 of 6 displayed reviews carry 5-star ratings, with owners consistently noting the founder's hands-on…”
Circulating Air Inc
“All five detailed reviews award perfect five-star ratings, with four specifically praising technician…”
Highland Heating & Air, Inc.
“5 of 7 reviewers assign 5-star ratings, with Chris, Scott, Jack, and Ashley named as individual technicians.…”
Woelfel Heating & Air
“Five of seven detailed reviews award 5 stars, with technicians named in each top rating. Positive feedback…”
AC Repair Costs in Longmont
Typical repair costs for Longmont homeowners, by problem type.
| Service | Low | Average | High |
|---|---|---|---|
Diagnostic / service call Usually credited toward repair | $83 | $132 | $220 |
Refrigerant recharge (R-410A) | $165 | $385 | $770 |
Capacitor replacement | $132 | $275 | $495 |
Fan motor replacement | $275 | $495 | $770 |
Compressor replacement | $880 | $1,980 | $3,080 |
Evaporator coil repair | $440 | $990 | $1,650 |
Labor (hourly rate) Per hour during business hours | $83 | $121 | $165 |
Prices reflect continental metro averages compiled from published industry cost guides, contractor surveys, and regional labor data. Last updated: April 2026.
AC Repair in Longmont, CO: What to Expect
Longmont sits within Colorado’s northern Front Range, sharing the high-altitude climate that puts systems through dry, warm summers and cold winters. Thin air at roughly 5,000 feet reduces AC capacity by about 10–15%, so sizing errors show up quickly and heating dominates load calculations. With six contractors averaging a 4.8 rating and four offering 24/7 service, ac-repair Longmont is a steady seasonal demand.
Specific pricing data from top cost items isn’t available here, but homeowners should expect variation driven by unit derating, accessibility, and whether repairs require refrigerant, compressor, or control-board replacement. Local jurisdictions handle HVAC licensing since Colorado has no statewide license, so verify any contractor’s local credentials and permits before work begins to avoid surprises and ensure code compliance.
Customer highlights weren’t supplied, so look for patterns in reviews: responsiveness, clarity of estimates, and documentation of diagnostics matter most. Prioritize technicians who explain derating and sizing decisions for high-altitude systems and who provide written warranties. Given the tight performance margins at elevation, choose a contractor who measures system output and documents repairs rather than guessing.