AC Repair Denver: $163 to $1,328 + Check This First (2026)

Denver rows are ConsumerAffairs' local figures for all HVAC repairs; national rows are labeled.

Do this now: Denver AC not cooling

1. Check that the thermostat is on cool and set below room temperature, and that the breaker for the outdoor unit has not tripped.
2. Check the air filter and swap it if it is clogged.
3. Hot house and someone feels sick? The CDC says fans help only below 90 F indoors; above that, go somewhere with air conditioning (dial 2-1-1 to find one).
4. Run through AC not cooling: what to check before you book a visit.

Is it an emergency? Denver's hot days by the numbers

A dead AC is an emergency in Denver on hot days when someone in the house is elderly, sick or very young. Denver International Airport averages 46.2 days a year at or above 90 F and 1.9 days at or above 100 F, with a July normal high of 89.9 F, NOAA's 1991 to 2020 normals show. That is a short season, so in May or September an AC failure can usually wait for a daytime visit at regular rates. HomeAdvisor puts after-hours labor at $160 to $250 an hour against $75 to $150 regular. For night calls, see emergency HVAC repair.

What Denver AC repairs usually are

Most Denver AC repairs fall within the $163 to $1,328 ConsumerAffairs reported for HVAC repair in the city in 2026, after a diagnostic fee of $120 to $150. Nationally, HomeGuide puts a capacitor at $100 to $250, a refrigerant leak repair at $200 to $1,500 and a compressor at $600 to $2,500. Anyone who opens the refrigerant circuit must hold EPA Section 608 certification. If the compressor fails on an old system, price a replacement too: see AC installation in Denver. Part-by-part prices are on the national AC repair cost guide.

Evaporative coolers and permits in Denver

Denver's Quick Permit list for single-family homes and duplexes names both residential A/C and evaporative cooling units, and the city says replacement equipment must meet current energy code efficiency, checked at inspection. Repairs that do not replace equipment generally do not need one; ask the company. Colorado has no state HVAC license, and Denver does not accept contractor licenses from other counties or states, so ask for the Denver license number and confirm it with Contractor Licensing at 720-865-2770. Homeowners must pass an exam before pulling a mechanical permit themselves.

Local rules, programs and climate for Denver, from official city, state, utility, Census and NOAA pages. Aurora, Lakewood and other metro cities set their own rules.

Questions to ask a Denver AC company

1. What is your Denver contractor license number?
2. What is the diagnostic fee, and is it credited toward the repair?
3. Is the technician EPA Section 608 certified for refrigerant work?
4. Is the price for parts and labor together, in writing?
5. If the system is old, will you quote repair and replacement side by side?

More Denver heating and cooling guides

All heating and cooling: HVAC repair in Denver. Winter: furnace repair in Denver. Other cities: AC repair in Salt Lake City and AC repair in Phoenix. Every trade is priced on home repair costs. Calls go to an independent company that serves your area and takes this kind of job (how calls work).