AC Repair

AC Not Turning On in Parker, CO

An AC not turning on in Parker, CO usually comes down to power, a safety switch, or a worn electrical part. You set the thermostat to Cool and nothing happens inside or outside. Here is how to narrow it down before you call.

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Common causes

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Tripped breaker. The outdoor unit usually has its own breaker in the panel.

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Outdoor disconnect off. The box on the wall next to the unit may have been switched off.

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Failed capacitor. The unit hums but will not start.

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Bad contactor. The switch that sends power to the outdoor unit can burn or stick.

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Float switch tripped. If the condensate drain backs up, a float switch shuts the AC off to stop a leak.

What to check first

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Set the thermostat to Cool and below room temperature. Replace its batteries.

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Check the breakers for the indoor unit and the outdoor unit.

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Make sure the outdoor disconnect is in the on position.

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Look at the condensate drain pan or pump near the indoor unit. If it is full of water, the float switch may have shut the AC off.

AC tripping the breaker

Reset a tripped breaker once. If the AC trips the breaker again, leave it off. Repeated tripping points to a failing compressor, a shorted fan motor or a bad capacitor. That needs a contractor.

When to call

Call if the AC still will not start, if the outdoor unit hums with no fan, or if the breaker keeps tripping. In Parker, Colorado summer heat, a quick fix to a capacitor or contactor often gets the system running again.

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You call the line and describe what the system is doing.

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Your call goes to an independent local HVAC contractor who serves Parker.

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The contractor asks a few questions and sets up a visit that suits you.

Frequently asked questions

Why is my AC not turning on?

Check the thermostat, the breakers and the outdoor disconnect. If those are fine, a failed capacitor, contactor or a tripped float switch is likely.

It can be a failing compressor, a shorted motor, a bad capacitor, or loose wiring. Reset it once only and call if it trips again.

It is a safety switch in the condensate drain or pan. When water backs up, it shuts the AC off to stop a leak. A clogged drain line is the usual cause.

Talk to a local HVAC contractor

AC will not start in Parker? Call (303) 647-3227. We connect you with an independent local HVAC contractor who can test the electrical parts.

Call (303) 647-3227

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