The high pressure side starts at >150psi or so and then drops once it's got going and the air is cold.
I suspect I’ll be buying a vacuum pump soon, just because...
Aircon not working diagnosis
Re: Aircon not working diagnosis
Well it all looks professional. No idea what I’m doing though.
The high pressure side starts at >150psi or so and then drops once it's got going and the air is cold.
I suspect I’ll be buying a vacuum pump soon, just because...
The high pressure side starts at >150psi or so and then drops once it's got going and the air is cold.
I suspect I’ll be buying a vacuum pump soon, just because...
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"not a professional engineer, mechanic and mechanist"
Re: Aircon not working diagnosis
High side seems a bit low. What are your static pressures (engine off and cold)?
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
Re: Aircon not working diagnosis
Yeah, it started higher and then dropped. It does pump out proper cold air though - so something is working.
I thought I took a pic of the pressure engine off & all cold - but fat fingers. Will have another go.
I thought I took a pic of the pressure engine off & all cold - but fat fingers. Will have another go.
"not a professional engineer, mechanic and mechanist"
Re: Aircon not working diagnosis
This is with AC set to max cold, right?
You'd need a gas recovery system, too, if you intend to do any work on the system. And a way to accurately measure the amount of gas (and PAG oil) to go back in.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
Re: Aircon not working diagnosis
I thought it was just a good set of scales to measure gas going back in?
Anyway, I should stop this line of thought. I have enough tools in the garage as it is....if it's broken, I'll fix it and then get kwikfit or whoever to vacuum & recharge it with the machine.
Which reminds me of the fix on my old Saab. The high pressure line had corroded through from before we bought it. So I rigged up an adaptor to the compressor to pressurise it and find the leak. Then a bit of JB Weld, couple of hose clamps and a bit of tube that fit snugly round the outside to make a patch and bingo - aircon fixed without having to take the whole front of the car off, not even the bumper, to get working aircon again.
Anyway, I should stop this line of thought. I have enough tools in the garage as it is....if it's broken, I'll fix it and then get kwikfit or whoever to vacuum & recharge it with the machine.
Which reminds me of the fix on my old Saab. The high pressure line had corroded through from before we bought it. So I rigged up an adaptor to the compressor to pressurise it and find the leak. Then a bit of JB Weld, couple of hose clamps and a bit of tube that fit snugly round the outside to make a patch and bingo - aircon fixed without having to take the whole front of the car off, not even the bumper, to get working aircon again.
"not a professional engineer, mechanic and mechanist"
Re: Aircon not working diagnosis
Brilliant. I am pretty sure this is what has happened to my 9000, a lot of corrosion around the high pressure switch. Anyway, it all looks far too corroded to try and fix. Suspect I am going to let the car go after the next MOT anyway.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
Re: Aircon not working diagnosis
Engine off and cold.
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"not a professional engineer, mechanic and mechanist"
Re: Aircon not working diagnosis
Looks about right. But there’s only so much you can tell from the pressures.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
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