Air conditioning fan stays on


  #1  
Old 09-02-08, 11:53 AM
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Air conditioning fan stays on

The air conditioning in my house works fine but at night when the temp drops I shut off my air conditioning , but the fan out side runs continuously , I have to go outside and pull the fuse to stop it .... any ideas ?
 
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Old 09-02-08, 02:42 PM
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You need to post your question to the AC board under plumbing..
 
  #3  
Old 09-02-08, 09:44 PM
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The compressor stops, but not the fan?

Make and model of the outside A/C unit?

I find it odd that the if fan will keep running, and the compressor stops.. Most units use one contactor to run both fan and compressor.
 
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Old 09-03-08, 07:58 AM
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Air Conditioning help

We need more info as was stated is just the fan running and not the compressor if everything is running you may have a stuck contactor but that would also be strange that it did not result in a freeze up
 
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Old 09-03-08, 01:59 PM
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Some condensing units break only one side of the line when the contactor shuts off. Since you more than likely have a 230 motor with a hot lead still going to it, there is a winding in the motor that is gone to ground and the motor will continue to run but at a lower speed. Before you change the motor, which you will probably have to do because it is going to blow out soon, do this to prove what I am saying. Cut the power off, be sure your cap is discharged and disconnect the the leads. One ohm meter on a good ground, the other on a motor lead will probably read a very low resistance verifying it is grounded. LOL
 
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Old 09-03-08, 04:37 PM
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Air Conditioning Basics

A very interesting hypothesis but we still are not sure the compressor is not running
 
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Old 09-03-08, 06:21 PM
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Mike, the original post implied that the compressor was off.
Jay"s post #3 got the same impression.
If the compressor is in fact not running, then I am not merely guessing, but stating from experience.
 
 

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