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  #1  
Old 05-17-2009, 11:18 PM
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a/c help

my 85 300D turbodiesel will only blow hot air, and it does so out of the defrost vents and the two outer vents . it will not blow out of the middle vent and it also wont blow out of the lower vents . why is this ?

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  #2  
Old 05-18-2009, 08:29 AM
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Location: central Texas
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There is a lot of good info in the archives available with the search...
These type vent problems are pretty common...
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Old 05-18-2009, 11:26 PM
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yea i discovered the archives right after i posted this but now i need to know why my ac compressor doesnt work . there appears to be no power going to it so i hot wired it and the air temperature doesnt change ?
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Old 05-18-2009, 11:59 PM
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Quote:
Originally Posted by deadhead300d View Post
now i need to know why my ac compressor doesnt work . there appears to be no power going to it so i hot wired it and the air temperature doesnt change ?
The refrigerant level is probably too low to close the low pressure cut-out switch. A lack of continuity across the switch would tend to confirm that condition. Checking the system pressure would remove any doubt.

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