AC failure

DANNY PROCTOR

MEMBER
2004 BUICK PARK AVENUE
3.8L
V6
2WD
AUTOMATIC
147,000 MILES

I started working on my car and checked it out and it was showing that I had a blockage I took the orfice tube out and it was stopped up really bad. I changed it and also change the accumulator. I tried to put Freon in it after that but I first vacuum to system down. When I tried to put Freon in it it jumped up high really quick like there was still a blockage. I do not know what else could be blocked in the system the AC pump is coming on but for some reason another it takes very little Freon for the gauge to jump up really high. Could you tell me even though the compressor is coming on if it still could be bad if not could you tell me where else to check for a blockage?

7 Replies

HMAC300

MECHANIC
48,601 POSTS

If filter was blocked bad then flush the system. There has to be more stuff in it you may have had the compressor fail or the desecant bag in accumulator broke.

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Sunday, May 21st, 2017 AT 7:54 AM

DANNY PROCTOR

MEMBER
4 POSTS

I changed the accumulator it is brand new. Someone told me even though the compressor is running it could still be bad. Is this true?

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Sunday, May 21st, 2017 AT 8:39 AM

HMAC300

MECHANIC
48,601 POSTS

Yes, but it sounds more like a blockage. If high side is very high and low side I near zero that is normally a blockage. If readings on compressor are same then compressor does not work. But still flush the system if you do not your compressor will fail once again.

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Sunday, May 21st, 2017 AT 9:04 AM

DANNY PROCTOR

MEMBER
4 POSTS

If the compressor is bad will it show up like a blockage the high side was reading a little over 150 the low side was a lot higher.

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Sunday, May 21st, 2017 AT 10:54 AM

HMAC300

MECHANIC
48,601 POSTS

The low side should be in a vacuum or at about 47 with 134 if working right it could also be to much Freon there should be a tag on radiator header on how much it should take. I still think you have a blockage and it should be flushed and started over.