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Air Conditioner Won’t Turn On? Here’s What To Check

Posted on: June 9, 2015

If your Air Conditioner has suddenly stopped working and won’t turn on, there are several things to check.

1. Make sure the thermostat is set to “Cool” and not been accidentally moved to “Off” or “Heat”.
2. Ensure the the thermostat temperature is set low enough to activate the AC unit.
3. Check that the external safety switch is set to the on position. This switch is usually located on an exterior wall near the condensing unit.
4. Check that the circuit breaker that controls the air conditioning compressor and the circuit breaker that controls the furnace blower or air handler, are in the “on” position. If a circuit breaker has tripped, reset the circuit breaker. If the circuit breaker cannot be reset, do not try to reset it again. Have a qualified technician check the unit to determine the cause of the problem.

If the air conditioner still won’t turn on, call ABC, we can quickly diagnose the problem and recommend solutions to fix the problem.

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  • “After a long day on a Friday (first snow of the year - lots of customers without heat), Dion L came to perform routine furnace inspection and filter change. Dion was courteous, efficient, informed us of all that he was doing, showed us an area of concern and how we…”

  • “Ron S., fixed an electrical short in the attic, which prevented a fire. He rewired the attic thru the bedroom ceiling light. He replaced an outside electrical connection, and repaired my ceiling fan. The attic wiring was very crazy. He did an outstanding job figuring it out and fixing the…”

  • “I called other before I call ABC and was giving long wait and schedule time to come out and check the heating system. So I received a message on the web about ABC Plumbing and Heating. So I called the company right away and they said what time would you…”

  • “I am so impressed with Chris and ABC Plumbing, Heating, Cooling. His friendliness honest approach to his Job is remarkable. Thanks Chris for making my day and believing that they are still great honorable people out there.”

  • “Paul B. serviced my furnace yesterday with an inspection and cleaning. He didn't stop there though, I had purchased a new filter for my humidifier on the furnace and he replaced that for me, showed me how to do it in the future and explained how to adjust the humidity…”

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