I Have done some searching to no avail. My air con had a leak to which I ending up changing the pipe on the right hand inner wing.
Got my local Indy to fit for me and re-gas, but this didn't work. I was told that the gas hadn't leaked and there were no faults showing on the Auto-logic diagnostic tool but the pressure on both sides were identical at 10bar has any one else had a problem like this or can offer advice on where to look next. Any help would be gratefully received.

Pressure sounds low should be up in the 20's to 30's on the low side .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

Previous: L322 Range Rover TDV8 3.6 2008; L322 Range Rover TD6 3.0 2002; P38A Range Rover V8 1999

Is that 20 or 30 Bar or psi

Sorry, psi, so 10 bar....145psi !!

My STP gauge indicates that that "happy" (filled) zone is 25-40 psi... .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

Previous: L322 Range Rover TDV8 3.6 2008; L322 Range Rover TD6 3.0 2002; P38A Range Rover V8 1999

I found this piece of information but it still puts mine way off

What is the correct AC pressure?
Actual readings will vary according to ambient temperature. The low-side should be near 30 PSI at 90 degrees Fahrenheit or less. Pressure that is too much lower or higher shows there is a problem. On a properly working system, high-side pressure will be about twice the ambient temperature, plus 50 PSI.

So my low pressure should be about 30 psi and mine is way too high and my high pressure should be about 112 psi still to high. have you any idea what might cause this.

Last edited by matlandy on 12th Aug 2018 7:43pm. Edited 1 time in total

The key information is the pressure on each side - low pressure and high pressure.

If you compressor is working, you should get a differential pressure between the low and high sides. If your compressor is not running, you would get equal pressures on the 2 sides. If your compressor is actually running and you get equal pressures on the 2 sides, your compressor is probably dead.

At about 90 degrees F ambient, normal working pressures with a good compressor would be about 30 to 40 psi on the low side and about 230 psi on the high side.

Looks like it might be the compressor. It goes in to the garage on Tuesday will let you know the outcome in case others get the same symptoms.

Is the pressure the same with engine stopped and running ?

If you look at the front of the compressor and the centre is spinning (so the compressor is engaged) and the pressure is the same both sides, I would agree with you, compressor fault.

If you see the pressure increase when the engine is running, it might not be the compressor, it could be the expansion valve.

What year is your car ? Too many toys, not enough time

2011 4.4 TDV8 AB Black

Last edited by John w on 13th Aug 2018 12:48pm. Edited 1 time in total

2006Rangie wrote:

The key information is the pressure on each side - low pressure and high pressure.

If you compressor is working, you should get a differential pressure between the low and high sides. If your compressor is not running, you would get equal pressures on the 2 sides. If your compressor is actually running and you get equal pressures on the 2 sides, your compressor is probably dead.

At about 90 degrees F ambient, normal working pressures with a good compressor would be about 30 to 40 psi on the low side and about 230 psi on the high side.

This is correct

With the system off/inactive, both high/low pressures should read around 5bar

With the system working, the high pressure can read as high as 15bar, with the low side down between 1.5-2 bar

Turns out it is the compressor that needs replacing had a few quote. Might be winter by the time I save up lol

Check eBay, plenty of 2nd hand ones on there. .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

Previous: L322 Range Rover TDV8 3.6 2008; L322 Range Rover TD6 3.0 2002; P38A Range Rover V8 1999

Finally got it replaced nice and cold ready for winter

Now you will need to fix the heated seats and steering wheel ready for next summer  Too many toys, not enough time

2011 4.4 TDV8 AB Black