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High Side Pressure switch

 
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  #1 (permalink)  
Old 07 Aug 2009, 07:21 pm
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Thumbs down High Side Pressure switch

How can I check the High Side Pressure Switch on the AC. Fan does not come on when AC is on. Fan works when engine temp rises.
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Old 07 Aug 2009, 08:39 pm
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Default Re: High Side Pressure switch

What you just described is not the switch but the low speed part of the fan. It should come on with the A/C.
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Last edited by CREWZIN; 08 Aug 2009 at 05:46 am.
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Old 07 Aug 2009, 10:31 pm
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Thumbs down Re: High Side Pressure switch

is that one of the relays that is under the hood that could be bad? I notice there are two in the fuse panel under the hood.
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Old 08 Aug 2009, 05:49 am
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Default Re: High Side Pressure switch

Yes, The high speed relay can be swapped with the horn relay to see if it's working but the low speed is a separate switch. There might be a way of testing it but I don't know how.
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Old 08 Aug 2009, 08:24 am
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Default Re: High Side Pressure switch

Thanks for you help I will test it out today.
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