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No cooling although A/C runs normal.

There is either low cooling or no cooling in my A/C. The house is newly buil and the A/C was installed around then i.e. two and half years back.

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Sound like possibly low on freon. Can't say for sure without getting my hands on it. Only reason to be low on freon is a leak somewhere in the system. A/C's don't "use" freon; the system should be completely sealed. I recomend turning the system off until you can have a qualified professional check out the system as it is very ******* the system to run it if it is truly low on freon.

Posted on Jun 25, 2008

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Your main concern is the temperature difference across the indoor coil for both heating and cooling. When you turn your thermostat from auto to on, you are on high speed.

If you have long duct runs and little return air registers then high speed
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could lose up to 10degrees by having the high speed setting.

What they installed is sized for your house and the speeds should not have to be changed unless the ductwork is not sized right for the house.
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Please remove the filter on the grill and try to clean it under the tap water and after removing all the dust fix it back to the unit. This would increase the cooling efficiency of the unit.

Your AC is also five years old. Please avoid frequent opening of doors or windows.

Ensure that the exhaust fan and the blower of your unit are functioning normal.

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Ok where do you set thermostat [stat]at? to low the normal A/C unite will only satisfy to certain temp if to low will just keep running. where is the Stat in the house sun on it? is the house cooling down. do have lots of window facing West if so large heat load or East. how large is the house maybe to small of a unite. try setting up at 79 see if shut down. hope this Help Paul

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if all the coils on the out side and inside units are clean and the fan motors are running fine it sounds like it could be low on freon

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