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Old 03-20-2012, 10:39 AM   #1
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Bryant Central Air unit is short cycling.


With the weather being in the 80's here in KY, I decided to turn on my AC for the first time last night. The unit would kick on and run about 10 seconds then kick off, kick on run for 10 seconds or so and then kick off....it would keep doing this until I turned the unit off from the thermostat. Any ideas as to what I can check to troubleshoot?

Thanks, Abs

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Old 03-20-2012, 12:40 PM   #2
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Bryant Central Air unit is short cycling.


Either the it is tripping on overload or the low-pressure switch.

Does the outdoor fan run?

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Old 03-20-2012, 12:56 PM   #3
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Bryant Central Air unit is short cycling.


The outdoor fan will run for about 10 seconds and it sounds fine (like it always has) and then it will kick off...then do it again until I turn it off from the thermostat. The inside fan is set to auto and runs fine. I had it running last night on low to circulate the air inside my house. Thanks a lot for your help, I really appreciate it.
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Old 03-20-2012, 01:26 PM   #4
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Bryant Central Air unit is short cycling.


yeah, sounds like a low-pressure switch trip.

the indoor fan stay running while this happens?
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Old 03-20-2012, 01:54 PM   #5
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Bryant Central Air unit is short cycling.


Not sure, I will check when I get home. If it does, what should I do?

Thanks again.
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Old 03-20-2012, 02:26 PM   #6
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Bryant Central Air unit is short cycling.


You need to call a tech to check the refrigerant charge. He'll be able to either reset or bypass the low pressure switch.

This switch is protecting the compressor from burning up due to lack of oil in the refrigerant which keeps it lubricated and cool.

The switch is on the low voltage control wiring side of the unit, internally.

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