big loud buzzing sound from outside unit.

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Old 06-23-11, 07:16 PM
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big loud buzzing sound from outside unit.

I have very big loud buzzing noises from outdoor unit suddenly and found no cool air was coming in. The thin pipe from outside unit was not hot and the thick one was not cold. The fan inside and outside were running. I shut it down and tried in ten minutes. The A/C is running okay then.

What could cause the big noise like that. Would it be contactor, bad capacitor or just could it be compress going bad?. I have 4 ton bryant unit split systme with evap coil inside in Dallas, TX. I don't want to be stranded in 100 degree weather.
 
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Old 06-24-11, 04:18 PM
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The contactor can cause buzzing noises.....
 
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