July 6, 2020

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AC Gremlins

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astrojohn
I am smitten with my van
Posts: 38
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How many wheels are on an Astro van? (4): 4

AC Gremlins

Post by astrojohn » Wed Jun 01, 2016 2:18 am

I have a 2002 Astro AWD, only 130,000 miles. I've had it for a couple years now, and the air conditioning has worked. This spring, I thought I'd turn it on, to see if it worked. To my surprise, it didn't. The compressor wouldn't kick in.
I put my gauge on it, and it showed there was R134-A in it. So I jumpered across the low pressure switch, to see if it would kick on.
It wouldn't do that. So following the schematic, I checked the 3 fuses, that have anything to do with the ac, and all were fine.
I checked the relays, and even swapped them around, and all were functioning fine. I even did a continuity check on the high pressure switch, and that was fine. I pulled the HVAC control out, and checked to see if the switch was fine, and it was.
So, not knowing what else to do, I jumpered across the low pressure switch again, this time forcing the small wire down into the plug in.
Low and behold, the compressor kicked in. It kept cycling on and off, even on max ac, so I added a can of refrigerant.
The accumulator immediately frosted up, and I thought good.
As soon as the refrigerant ran out, in the can, the accumulator warmed up, and no more cold air.
I tried it with another can of refrigerant, and the same thing happened.
I know I only have the single gauge, which goes on the low side, but the system does have pressure.
I'm no guru on ac, so I'm asking, what is going on? The ac compressor kicks on, but cycles on and off, and I don't get any cold air.
I've never had any experience with in line filter, so not sure if that is plugged. I even crawled under the dash on the passenger side, and while switching the HVAC control around, watched the door seem to be opening and closing.
I like to do my own repairs, and would like to do this one too, except for recharging the ac though.
Can anyone help me out here, and steer me down the right path to success? Miss my ac, and want it back :-k

rpjn59
I am merely driving my van
I am merely driving my van
Posts: 23
Joined: Sat Jun 16, 2018 5:51 pm
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How many wheels are on an Astro van? (4): 4
Location: Florida
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Re: AC Gremlins

Post by rpjn59 » Fri Apr 10, 2020 11:50 pm

Wow, I was researching a/c problems and solutions to diagnose my own a/c problems. I came across your question here and felt bad that no one responded to your plea. So, what did you end up figuring out was the problem with your a/c system?

Ray
04 Astro
Passenger

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