a/c acting up - The 1947 - Present Chevrolet & GMC Truck Message Board Network

CHUCKER · 07-10-2002, 11:21 PM

was wondering why the ac on my 94 will sometimes work and other times not. 2 days ago on my way to work it just started blowing warm air. then on the way home that night after trying 3 or 4 times it came on. did the same thing today also but this morning it came back on after about 20 min. any ideas??

RipMeyer · 07-10-2002, 11:33 PM

Compressor not engaging? Is the charge up to snuff? A low charge could keep the compressor from coming on.

CHUCKER · 07-10-2002, 11:42 PM

when it works it's blowing very cold air. I'll have to check and make sure the compressor is kicking on in the morning.

RipMeyer · 07-11-2002, 12:03 AM

A low charge can blow too cold. Put some gages on it and see what the high and low side read.

70shortnphat · 07-11-2002, 02:40 AM

The wire connector to he low pressure switch on the acuumulator gets loose all the time on those. I seen it countless times. the next time it stops blowing cold, wiggle this connector.If the compressor starts when you wiggle the connector replace it and the loww side switch.It just unscrews and you will not loose any freon (has a schrader valve).

jones · 07-11-2002, 08:32 PM

not to get to far off the subject - but
what's a good price for a set of AC manifold gauges?

07-10-2002, 11:21 PM	#1
CHUCKER Registered User Join Date: Jun 2000 Location: LEE'S SUMMIT, MO. USA Posts: 246	a/c acting up was wondering why the ac on my 94 will sometimes work and other times not. 2 days ago on my way to work it just started blowing warm air. then on the way home that night after trying 3 or 4 times it came on. did the same thing today also but this morning it came back on after about 20 min. any ideas?? __________________ 1972 K/20,4X4,454, dark olive 1937 General motors truck (big project) 2005 gmc envoy (wife's) 2003 2500hd ls, crewcab, 4x4, 360, hd 4spd automatic trans., Lee's summit, MO. S.E. of Kansas City,MO

07-10-2002, 11:42 PM	#3
CHUCKER Registered User Join Date: Jun 2000 Location: LEE'S SUMMIT, MO. USA Posts: 246	when it works it's blowing very cold air. I'll have to check and make sure the compressor is kicking on in the morning. __________________ 1972 K/20,4X4,454, dark olive 1937 General motors truck (big project) 2005 gmc envoy (wife's) 2003 2500hd ls, crewcab, 4x4, 360, hd 4spd automatic trans., Lee's summit, MO. S.E. of Kansas City,MO

07-11-2002, 02:40 AM	#5
70shortnphat "See the U.S.A....." Join Date: Apr 2002 Location: Richmond TX. Posts: 269	The wire connector to he low pressure switch on the acuumulator gets loose all the time on those. I seen it countless times. the next time it stops blowing cold, wiggle this connector.If the compressor starts when you wiggle the connector replace it and the loww side switch.It just unscrews and you will not loose any freon (has a schrader valve). __________________ 1970 short bed fleetside 1949 all origional chevy 3600 1974 camaro Richmond , Texas(just S.W.of Houston)

07-10-2002, 11:33 PM	#2
RipMeyer Registered User Join Date: Oct 2001 Location: Southern New Mexico Posts: 649	Compressor not engaging? Is the charge up to snuff? A low charge could keep the compressor from coming on.

07-11-2002, 12:03 AM	#4
RipMeyer Registered User Join Date: Oct 2001 Location: Southern New Mexico Posts: 649	A low charge can blow too cold. Put some gages on it and see what the high and low side read.

07-11-2002, 08:32 PM	#6
jones Registered User Join Date: Jun 2002 Location: North Idaho Posts: 43	not to get to far off the subject - but what's a good price for a set of AC manifold gauges?



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