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Old 06-25-2005, 10:05 PM   #1
germanturbo
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1995 IMPREZA 1.8 4WD

Default A/C not working, 95 1.8L Impreza

AC works at idle, cools nicely. Low side pressure 35-45, high side around 250. Start driving, ac cycles like crazy, low side will drop to 12 while high side will bounce 400.

What's wrong here? Is it the expansion valve? If so, any links to tech info on how to do (and how long it will take?) Looks like you have to tear dash out to get to it.

Please help, it's my wife's car and she's hacked off.
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Old 06-25-2005, 11:40 PM   #2
CGM-WRX
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I don't think its the expansion valve. If it is stuck close, low and high side should read low. If it is stuck open, low and high side should read high.

Even at idle, I think your high side is too high.

Air in the system??? Also a restriction in the high side???

What do you see at the sight glass?
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Old 06-26-2005, 05:15 AM   #3
Erock11
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Ouch man. I hate it when wives get like that.
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Old 06-26-2005, 02:02 PM   #4
germanturbo
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Well if it's not the exp. valve that is sure good news.

We know the compressor is doing it's job.

My car doesn't have a sight glass (at least not that I can find).

So where might there be a restriction in the high side? Is there a filter or a screen in one of the high side hoses or pipes? What might I be overlooking here?

It's hot in Arkansas / Oklahoma
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Old 06-26-2005, 04:41 PM   #5
CGM-WRX
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What is the condition of the condenser?
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Old 06-26-2005, 06:42 PM   #6
germanturbo
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Visually the condition of the condenser is great...clean, no corossion,looks great...is there a test I can do on that component while system is still all together & charged?
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Old 06-27-2005, 02:28 AM   #7
CGM-WRX
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Not really...only way that I know of is visually checking. As long as the condenser looks clean (not much bugs/rocks/dirts) and fins are good, then it can be assume that the condenser is not restrictive.

Have you ever try just recover/evac/recharge the system?
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Old 06-27-2005, 10:10 AM   #8
Legacy777
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The system is probably over charged, or it has contaminents in it.

My nissan pickup cylces too much. It needs to be evacuated, flushed, and recharged. I've got the stuff, just haven't had the time.
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Old 06-27-2005, 07:59 PM   #9
anders8
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Quote:
Originally Posted by germanturbo
Please help, it's my wife's car and she's hacked off.
If it was your car, mess around with it. Since it's hers, and it's only getting hotter, just take it somewhere.

Anders
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