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1999 GMC van rear air issue
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cmack3
New User
May 30, 2014, 7:21 AM
Post #1 of 10
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1999 GMC van rear air issue
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1999 GMC Savanah Van..5.7 Had the AC compressor changed...all works fine except rear air. I have a separate blower switch that works bur blows only warm air. All worked before new compressor. Something not hooked up or what? Is there a separate evaporator for the rear?
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Hammer Time
Ultimate Carjunky
/ Moderator
May 30, 2014, 8:04 AM
Post #2 of 10
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Re: 1999 GMC van rear air issue
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What happened to the old compressor?
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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cmack3
New User
May 30, 2014, 9:39 AM
Post #3 of 10
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Re: 1999 GMC van rear air issue
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The old compressor just died....as old compressors can do. Seal problem....showed up with dye test. New one works great....but no rear cold air
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Hammer Time
Ultimate Carjunky
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May 30, 2014, 9:55 AM
Post #4 of 10
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Re: 1999 GMC van rear air issue
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You likely have a plugged up expansion valve in the rear.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Hammer Time
Ultimate Carjunky
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May 30, 2014, 1:58 PM
Post #6 of 10
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Re: 1999 GMC van rear air issue
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The problem is only in the rear. Front is working fine.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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cmack3
New User
May 30, 2014, 3:45 PM
Post #7 of 10
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Re: 1999 GMC van rear air issue
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The work was done at a shop...I know they flushed system...i assume they replaced what needed to be replaced....as I said before..the system works fine ..I am just not getting any cold air out the rear vents. They are operated by separate fan switch...which works
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cmack3
New User
May 30, 2014, 3:48 PM
Post #8 of 10
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Re: 1999 GMC van rear air issue
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Where might expansion valve be located...I have a bed/bench mounted in back
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Hammer Time
Ultimate Carjunky
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May 30, 2014, 10:26 PM
Post #9 of 10
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Re: 1999 GMC van rear air issue
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The expansion valve is mounted right at the rear unit evaporator. The only other possibility is the blend door actuator for the rear being stuck on heat. You could determine that by pinching off one of the heater hoses going to the rear and see if it gets cold. If not, then the expansion valve has to be the problem
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Discretesignals
Ultimate Carjunky
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May 31, 2014, 4:01 AM
Post #10 of 10
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Re: 1999 GMC van rear air issue
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If you had a shop perform the repair on the ac system, why are they not figuring out your problem? That would be considered a comeback.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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