Found a place who will run basic checks and regas for £25 so I'm going to try that first before doing anything else.

Yeah if you had a gauge set you could have checked the pressures yourself, for that price you might as well get it regassed.

0 bar would mean no gas if the sensor/wiring is OK. You probably have a compressor shut off code as well relating to low pressure in the system. Do you know when it was last regassed?

Edited 11 June, 201610 yr by Dazza95

All gassed, no leaks ... Still no air con.

G65 seems to be culprit or wiring

If it was the wiring for the G65 then it would be short to ground, not low pressure / signal?

Ross-Tech says most likely low refrigerant pressure in system.

Maybe, but 0.0 seems remarkably low. Chances are that it needs some gas anyway though, unless you know it's been done in the last 5 years.

Not sure vcds would spot the difference between a bust signal wire and a real zero reading? You'd hope so, somehow. Might experiment later.

No voltage at G65 ... Running out of patience with this car and electrical faults!

Where does the G65 wiring go?

Errrr ...helps if I make sure multimeter is set properly!

12v at wiring ...

Sensor it is!

Wiring goes into scuttle area near brake servo i think.through firewall fromm there.

Edited 11 June, 201610 yr by Wino

Off to buy new sensor

Fair play.

Fingers crossed this fixes it ... and work out how to get to the sensor to replace it! Looks tight in there ...

I assume I don't need to drain down system to replace? I'm sure I read somewhere this wasn't required?

Think I've read the same.

New G65 done ... No air con. Grrrrrr

Ok so ... Fault code has cleared ...

Compressor load on idle: 81%

5.8 bar pressure (G65)

Fans no workie...

Ok, so fans have been tested by shorting thermoswitch wires ... I get slow speed and fast speed depending on which way they are connected ....

Thermoswitch ?

Thermoswitch not involved when AC module brings on fans. Look to fan control module next. AC module grounds a couple of the thin signal wires to this unit, triggering the relays inside. Wiring info coming shortly.

Have you let g65 pressure go above 9 bar? Cos I wouldnt expect fan action before.

Edited 11 June, 201610 yr by Wino

No not let it go above 9 bar ... Still no air con though.

Time to test fan control module then ... Appreciate the help and info.

As it sits ...

Aircon should do stuff even without fan help, while pressure is low enough. Does the button light up? Got cabin fan running?

Left idling for a while and G65 doesn't go above 5.5 bar ...

Button lights up, switch on / off and compressor load drops from 80% to 0% ...

Cabin fan works on all speeds ...

Argh! Lol

So is the compressor doing any compressing?, Doesn't seem like it. The pulley hasn't sheared at the rubber coupling has it?

How do I check that fella?

Not 100% as I haven't looked into it or seen one where it's 'gone'. I think someone once described it as the pulley going round as normal, but the central shaft not rotating, not sure which end of the shaft can be seen. Will pop out and have a look now.