AC PROBLEM

1999 Volkswagen Beetle

Tiny

brauns butcher block

June, 17, 2012 AT 4:56 PM

I had it completely evacuated and put 1 can of freon in. 80 # on low side and have no way of checking high side. Presure builds as car is running with ac on

FOUND 2468 RELATED QUESTIONS

A/c

7 ANSWERS
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12 ANSWERS

9 Answers

Tiny

KHLow2008

June, 17, 2012 AT 5:31 PM

Pressure build on the low side?

Tiny

brauns butcher block

June, 17, 2012 AT 5:39 PM

Yes

Tiny

KHLow2008

June, 17, 2012 AT 6:14 PM

Without knowing the high pressure side, it is not possible to pin point the exact fault.

Possible causes are : a) If low pressure hose and check joint are cooler than around evaporator, the expansion valve is faulty.

B) If the suction pressure is lowered when condenser is cooled by water, you have excessive referigerant in system.

C) If high and low pressure equalized as soon as compressor is stopped, the compressor is faulty.

Tiny

saturntech9

June, 17, 2012 AT 6:17 PM

Like I said before you need both pressures for diagnoses.

Tiny

brauns butcher block

June, 19, 2012 AT 6:06 PM

The high side is 40 and the low side is 80 withon can of freon

Tiny

KHLow2008

June, 19, 2012 AT 6:20 PM

That is not possible. Reonfirm the pressure reading.

Tiny

brauns butcher block

June, 19, 2012 AT 8:21 PM

I had a small garage look at it and put a full charge in it. It 200# in high side and 80 in low side. He thinks the compressor is not sucking in. Thought it should be 40# in low side

Tiny

KHLow2008

June, 20, 2012 AT 12:47 PM

The low side is too high whereas the high side is below expectation so a faulty compressor is the likely cause.

Tiny

brauns butcher block

June, 20, 2012 AT 6:08 PM

Thank you

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