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06-22-2010, 04:29 PM
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#1 |
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Registered User
Join Date: Jan 2007
Location: USA
Posts: 440
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AC Fan Strength?
Hey all, have a quick question regarding AC... just fixed the AC on R134 and it blows very cold (not as cold as a 2011 model car would, though). It can still cool off the cabin even in 100 degree GA heat, but it takes a while. I think part of the problem is the fan strength and/or blocked vents.
On MAX AC with the fan on HIGH, it blows strong out of the driver's left vent, the middle dash vent, and the middle floorboard vent. Eventually the floorboard vent seals up and it blows stronger out of those two dash vents. However, the passenger right vent blows weak and the vent over the radio/HVAC blows weak as well. Just curious as to whether I should grab the fan first or pull the dash and look for vent blockage; do these old trucks blow a little weaker, especially without R12? Anybody have a similar experience? If I could get more air-current strength the cabin would cool off quicker. Thanks...
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Kurt Instagram: @kurtkphoto 1978 C10 Silverado 1991 Camaro B4C |
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06-22-2010, 06:50 PM
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#2 |
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BAD BOW-Silverado XST
Join Date: May 2000
Location: Senior Member from Austin, TX
Posts: 6,431
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Re: AC Fan Strength?
What type of condensor is installed? R12 or R134? Do you have the ends closed off. Force as much air through the condensor as possible. Use foam or something to close the gap between the air codensor and raidiator. Check the heater flap. It may not close all the way when you go from heat to cold.
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06-22-2010, 07:00 PM
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#3 |
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Registered User
 Join Date: Jul 2003
Location: Franklin, NE
Posts: 387
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Re: AC Fan Strength?
On the passenger side vent, make sure the flex tube that goes from the vent to the AC plenum has not slipped off or desinigrated. You can reach it by pulling the glove box down.
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06-22-2010, 07:14 PM
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#4 |
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Registered User
Join Date: May 2005
Location: Tallahassee Fl
Posts: 773
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Re: AC Fan Strength?
Should blow out of the four upper vents when on AC..... probably bad hoses and leaking vacuum to the servo that controls the vent direction.
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06-22-2010, 07:28 PM
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#5 | |
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Registered User
Join Date: Apr 2010
Location: Newcastle, OK
Posts: 1,344
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Re: AC Fan Strength?
Quote:
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06-22-2010, 09:51 PM
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#6 |
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BAD BOW-Silverado XST
Join Date: May 2000
Location: Senior Member from Austin, TX
Posts: 6,431
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Re: AC Fan Strength?
Close only the end side gaps!! You want to force air through the condensor then the radiator. Air will go around the condensor if the ends are open.
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