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Troubleshooting: Central Air Conditioner

Nothing can be more frustrating on a hot day than coming home to find that your central air conditioner will not turn on. Before you call a technician to arrange for a service call, you may want to do some troubleshooting of your own first.

When your Central Air Conditioner Will Not Turn On

There are a number of reasons why your air conditioning unit will not work at all. Here are some of the most common causes of the problem:

  • Blown fuse or circuit
  • Faulty or improperly set thermostat
  • Internal switch has been thrown off

Solutions to the Problem

  • Blown Fuse or Circuit

Make sure the double breaker (the 240 volt circuit breaker) controlling the air conditioner compressor/condensing unit as well as the 120 volt circuit breaker that controls the furnace blower or the air handler are both in the “On” positions. If you see that the circuit breaker has popped or the fuse has blown, reset the circuit breaker or replace the fuse.

If you replace the fuse or reset the breaker and they fail again, call Air Depot to arrange a service call. Our service technicians will be able to determine whether you have a more serious problem.

  • Faulty or Improperly Set Thermostat

Check the thermostat to make sure it is set to the “Cool” position and not “Off” or “Heat.”
Check the temperature to confirm that it is below the current room temperature.

  • Internal Switch Issues

Check all the switches on the air conditioner to make sure they are set to the “On” position.
Make sure that the external safety switch, which is usually on the outside wall next to the condensing unit, is also set to “On.”

If you have checked all these possibilities and your air conditioner is still not working, call Air Depot to schedule a service call. We are your local air conditioning experts in Cypress Texas.

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