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A/C Weird Issue

joe7670 on Mon July 27, 2009 1:01 PM User is offline

Year: 1998
Make: VW
Model: Golf
Engine Size: 2.0
Refrigerant Type: 134A
Ambient Temp: 85
Pressure Low: 60
Pressure High: 60
Country of Origin: United States

A/C System was not cooling. Checked pressure with guages and the pressure was the same on both low and high sides.
Replaced compressor with rebuilt unit. Tried to fill with 134 and it would only go upto 60lbs and same problem, both sides had same pressure.

Replaced expansion valve. Same exact problem.

Did I possibly get a bad rebuild or is there something else I should be considering?

Compressor is kicking in as the clutch is heard and seen when enegaged, but can't confirm that it's compressing.

Chick on Mon July 27, 2009 1:50 PM User is offlineView users profile

did you pull a deep vacuum each time you recharged? have you changed the drier along with the compressor and added back the proper amount of oil?? The vacuum is the most important question right now though...

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Chick
Email: Chick

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Freedoms just another word for nothing left to lose

joe7670 on Mon July 27, 2009 1:56 PM User is offline

Pulled vacuum for about 1 hour using a ventury style vacuum which is hooked up to compressor.

Even on no vacuum, shouldn't the compressor cause a higher reading on the high side?

Compressor was pre oiled.

GM Tech on Mon July 27, 2009 3:14 PM User is offline

Looks like compressor is not turning-- is front hub spinning? sure the clutch is splined ok to the shaft?

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The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......

joe7670 on Mon July 27, 2009 3:21 PM User is offline

Yep, clutch is spinning. When I start to add the 134 I hear it kick in and can visually tell that the clutch it spinning.

I was reviewing the possibility of a clog, but don't think a clog would cause both low and high side to read the same exact pressure. Especially the low around 60?

Got compressor from ebay rebuilt guy, hope he doesn't give me a run around.

If there is anything else I may be overlooking please let me know.

GM Tech on Mon July 27, 2009 3:29 PM User is offline

got the gage set valves both closed at the manifold? (up by the gages) when charging, only low side is open...

-------------------------
The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......

joe7670 on Mon July 27, 2009 3:33 PM User is offline

Yep. Both guage valves are closed and when filling (or attempting to) I am filling via the low side.

joe7670 on Tue July 28, 2009 1:41 PM User is offline

Any ideas on something that should be checked before moving on to another compressor?

TRB on Tue July 28, 2009 2:06 PM User is offlineView users profile

I would contact Mr. Ebay and see what their approach is regarding your issue. There is a known bad batch of expansion valves on the market also.

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When considering your next auto A/C purchase, please consider the site that supports you: ACkits.com
Contact: ACKits.com


Edited: Tue July 28, 2009 at 2:07 PM by TRB

joe7670 on Wed July 29, 2009 2:59 PM User is offline

let me check.

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