HVAC Repair in Denver, CO
Homes here need heat from October through May and cooling from June through August. If your system quits, tell us what it's doing and a licensed contractor who covers Denver County will get in touch.
Tell us about the job
It takes about a minute.
Denver asks a lot of your system, in both directions
Your furnace carries the house from October through May, eight months of the year, and on winter nights that drop to 19°F on average it runs long and often. Each cycle puts a little more wear on the igniter and the parts that keep the burner lit. When one of those finally gives out, the house goes cold fast.
Come summer your air conditioner takes over for June through August, working against afternoons that reach 87°F. That is only three months, but it is enough to strain a compressor that has not run hard since last year. Add in Colorado's wind, 64 damaging wind events recorded over the past ten years, and the outdoor unit takes a beating from debris and hail on top of the heat. With 13% of Colorado households losing power for a day or more in 2024, a storm can knock out a system that was already working hard to keep up.
- 8 months
- October through May, your system heats
- 3 months
- June through August, it cools
- 19°F
- the average winter night it heats against
- 87°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
A new furnace and air conditioner would cut about $110 a year off heating and cooling for a typical Denver County home.
Estimates for a typical Denver County home, compared with an older unit built to the previous federal minimum, from EIA household energy data, Colorado fuel prices and NOAA climate normals. Your home will differ.
Repair makes sense when one part has failed.
Replacement makes sense when the furnace's heat exchanger is cracked, the air conditioner's compressor has failed, or repairs keep coming.
- Why is my heat not working?
- Start with the thermostat. Make sure it is set to heat and set a few degrees above room temperature, and check that it has power or fresh batteries if it uses a screen. If the thermostat looks fine, check your breaker panel, since a tripped furnace breaker will cut power to the whole system. Gas furnaces also need a pilot light or electronic igniter to be working, and if that fails the burners never light even though the blower may still run. At 19°F on a winter night here, a furnace that will not light needs a contractor out quickly rather than waiting it out.
- Why is my system running but not cooling the house?
- Check your air filter first. A filter clogged with dust blocks airflow across the indoor coil, and when air cannot move past it, the coil can ice over and stop cooling the air at all. Next check the outdoor unit and clear away any leaves, grass clippings or debris sitting against it, since it needs open airflow to release heat. If the filter is clean and the outdoor unit is clear but the air coming from your vents is not cold, the system likely needs a contractor to check the refrigerant charge or the compressor.
- What can I check before calling for HVAC repair?
- Check the thermostat settings and batteries first, since a dead thermostat looks exactly like a dead system. Check your breaker panel for a tripped breaker on the furnace or air conditioner circuit. Look at the air filter and replace it if it is visibly dirty, since poor airflow causes problems on both the heating and cooling side. For a furnace, listen for whether the blower runs at all, and for an air conditioner, check that the outdoor unit is running and not blocked by debris. If you have been without power recently, give the system a few minutes after power returns, since most equipment restarts on its own. Anything beyond this, a contractor will need to look at directly.