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ac compressor not engaging

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Old May 27, 2016 | 06:11 PM
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johnj54
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ac compressor not engaging

my 2008 e250 ac compressor is not going on , only blowing hot air. i took off compressor leads an checked for volts,nothing. i took off high pressure switch line and checked ohms on switch contacts and have 0 ohms. i need a diagram were the relays are located to check them. i did check the 15a fuse under dash ok. wood appreciate some help
 
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Old May 27, 2016 | 07:04 PM
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jimandnena
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Originally Posted by johnj54
my 2008 e250 ac compressor is not going on , only blowing hot air. i took off compressor leads an checked for volts,nothing. i took off high pressure switch line and checked ohms on switch contacts and have 0 ohms. i need a diagram were the relays are located to check them. i did check the 15a fuse under dash ok. wood appreciate some help
Owners manual here,
Owner Manuals | fleet.ford.com
Should be power relay locations in there. jim
 
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Old May 27, 2016 | 08:10 PM
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thanks jim
 
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Old May 28, 2016 | 05:26 AM
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You can also search AutoZone's site for free schematics if the underhood relay and fuse location drawings from the owners manuals don't get this resolved.

With engine running and A/C called for can you jumper the low pressure cut off switch and the compressor kick in? Do you know for certain there is refrigerant under sufficient pressure for normal operation?

In our Cooling & Heating sub-forum there is a FAQ thread begun by member ProjectSHO89---he also contributes there often, is very knowledgeable about Ford's A/C systems.

HTH
 
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Old May 28, 2016 | 11:14 AM
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The clutch won't engage if the charge is too low or too high. Normally the issue is a leak and low on Freon. if it was a gradual decline in cooling then that's almost certainly the issue. If it hasn't been used since last season and now doesn't work then it could be a leak or something else.
 
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