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Central air conditioner will not turn on at all.

Hi.
My central air unit will not turn on at all. It ran earlier but didn't cool the house off. Now it won't turn on at all and the fan doesn't run either.
Please help. Thanks
Carrier Tech2000SS

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  • Zippers May 21, 2009

    My husband doesn't think we have a heat pump. He changed the filter and no breakers are tripped. Can I have another solution please? Thanks

  • Zippers May 21, 2009

    Inside fan on the furnace runs but the fan on the outside unit doesn't run.

  • Zippers May 21, 2009

    Thank you very much for your time and solutions. I will call our HVAC man as you suggested. Thanks again! Take Care.

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  • 585 Answers

I understand this to be a heat pump. Check your thermostat settings, and the filters. And make sure a breaker isn't tripped.

Posted on May 21, 2009

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  • Bruce Volkers
    Bruce Volkers May 21, 2009

    Does neither the inside nor outside fan run?

  • Bruce Volkers
    Bruce Volkers May 21, 2009

    Perhaps this is all caused by a non-running fan in the outside unit. If the fan fails, the unit (compressor) will run but cool poorly until it overheats and shuts down. If the compressor cools down it may come back on but will overheat again without the fan. If the fan is at fault, you should check to see that it turns freely, and check the capacitors for the fan and also the compressor, as the one(s) for the compressor could be bad as a result. I read also that this unit has a low pressure switch. If some of the refrigerant has leaked out, it would also cause poor cooling and shut down. You need a licensed HVAC tech for that.

  • Frank Bennett Sep 24, 2013

    It is the outside fan I'm refering to

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How to fix problem of Air conditioner doesn't cool


How to troubleshoot and repair the most common problems with your central air conditioner Although some central air conditioner repairs must be handled by a qualified air-conditioning repairperson, you can handle simple repairs and maintenance yourself. Following, you'll find guidance based on the symptoms.

Air conditioner doesn't cool A central air conditioner that runs but doesn't cool may just need to be cleaned. Plan to do this on a relatively warm day. The following are basic guidelines, but always refer to your owner's manual.
1) Before you begin, turn off the power to the unit. There is normally a shut-off or disconnect panel on the house wall next to the outdoor compressor. Also shut off the air conditioner's 240-volt circuit at the main electrical panel.
2) Rake leaves and debris away from the outdoor condenser. Trim any bushes that might block airflow.
3) Unscrew and remove protective grilles and the top cover or grille from the compressor. If the fan is attached to the grille, be careful not to pull any wires loose.
4) Use a soft brush to clean dirt and debris from the fins, and then vacuum the fins with a brush attachment (taking care not to damage the fins).
5) From inside the unit, use a hose and nozzle with a trigger-grip to spray debris from the fins (protect the wiring and motor with plastic sheeting or a large plastic garbage bag). If your owner's manual calls for lubricating the motor, do that now--but don't overlubricate.
6) Reassemble the unit.
7) To test it, turn the thermostat to "Off," reset the power at the disconnect by the compressor and the main panel, and then set the thermostat to turn the unit on. Important note: To avoid straining an air conditioner's compressor, wait at least five minutes between turning it off at the thermostat and turning it back on. Let it run for a few minutes, and then feel the two pipes that connect to the condenser unit on the air handler (slide any insulation back). One should feel warm, the other cool.

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