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Old 09-14-2008, 10:27 AM   #1
cptcrnch
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1999 SC1
Default AC Only Blows cold when driving.

1999 SC1 Auto 130k. - Recently bought used.
My ac is only cold when driving above 30mph.
If I stop is goes warm ....FAST!!
Had my mechanic check it, says the system may have a plug in it somewhere. Coolant is NOT low.
Any other ideas b4 I have him start tearing the unit apart?
Thx!
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Old 09-14-2008, 10:37 AM   #2
Asterixx
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1997 SL2
1996 SL1
Default Re: AC Only Blows cold when driving.

Your two posts are related. The A/C is not working when stopped because the cooling fan is not forcing air through the condenser. When moving you're ramming air through. You need to fix the cooling fan.
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Old 09-14-2008, 11:14 AM   #3
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Default Re: AC Only Blows cold when driving.

^ ^ What he said! ^ ^ ^
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Old 09-14-2008, 03:05 PM   #4
lovinparkville
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2001 SW2
Default Re: AC Only Blows cold when driving.

The 2 things to check are the fan relay and the fan itself. The relay turns on at high heat (@220 degrees) or on AC on IF the system has R134 at a proper level (which you indicate the system is fine while moving), I'd look at the fan relay for sure as it's rarely used under normal driving.
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