Colorado HVAC Pros
Overhead view of a gray residential air conditioning condenser unit mounted on a concrete pad beside a house with asphalt shingle roofing.

AC Repair in Castle Rock, CO

Air conditioners here run from July through July. If yours quits, tell us what it's doing and a licensed contractor who covers Douglas County will get in touch.

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Step 1 of 3: Equipment
Overhead view of an outdoor AC condenser unit on a concrete pad next to a house with a dark shingle roof.

Castle Rock summers are short, and hail is the bigger threat

Cooling season here is really just July, with afternoons averaging 81°F. That's not the kind of heat that runs a compressor into the ground. What wears on an air conditioner in Castle Rock sits outside, in the open, through storms.

Douglas County has logged 158 hail events and 97 damaging wind events over the past ten years, with hailstones up to 2.5 inches. That kind of hail bends the thin aluminum fins on a condenser coil, and bent fins choke off airflow across it. A unit that took a hit doesn't always stop right away. It just starts struggling to cool, running longer to hit the same temperature, until it can't keep up at all.

1 months
July through July, your air conditioner is on duty
81°F
the average summer afternoon it cools against
158 hail events
in ten years, and hail bends the fins on outdoor coils
97 wind events
in ten years, and wind drives debris into outdoor units
Isometric cutaway illustration of a house showing interior ductwork, an air handler, and an outdoor condenser unit connected by lines, with simple furniture in the rooms.
Your air conditioner works hardest from July through July.

NOAA nClimDiv, 1991–2020 normals

Aerial view of a gray outdoor air conditioning condenser unit mounted on a concrete pad next to a house with vinyl siding.

A new air conditioner would save little on running costs in Douglas County, so the repair decision comes down to the unit's condition.

  • A new one at the federal minimum, 13.4 SEER2$130 a year
  • An older air conditioner$140 a year

Estimates for a typical Douglas 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 a part like a capacitor or contactor has failed.

Replacement makes sense when the compressor has failed or the system uses R-22 refrigerant, which is no longer made.

Why is my AC not blowing cold air?
Most often the filter is clogged and starving the system of airflow, or the refrigerant level is low from a leak. A dirty outdoor coil can cause the same problem, since it stops the system from releasing heat outside. With hail as common as it is in Castle Rock, a bent or damaged outdoor coil is also worth checking. A contractor can tell you which one it is and price the fix.
Why is my AC leaking water?
The drain line is probably clogged, backing water up and out of the pan instead of outside. It can also mean the condensate pan has rusted through, or the coil is frozen and dripping as it thaws. A dirty filter causes that kind of freeze-up, so check it first. If the leak keeps coming back, a contractor should look at the drain line and the coil.
Why won't my AC turn on?
Start with the thermostat batteries and the breaker before assuming the worst. A tripped breaker or a blown fuse at the outdoor unit is a common cause, and Castle Rock sees enough damaging wind and hail that outdoor electrical connections are worth a look too. If power is reaching the unit and it still won't start, the capacitor or the control board may have failed, and a contractor will need to test it.
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