Quick question: where is the A/C Pressure Switch (F129) located on a Roomster

[Kapper]

Hello all.

 

Car is a Roomster 1.6 petrol from 2008/2009 (BTS) with Climatronic.

 

Aircon compressor won't kick in, and I get these codess:

01274 - Air Flow Flap Positioning Motor (V71) 
            000 -  - 
00792 - A/C Pressure Switch (F129) 
            000 -  - 

 

I hope you can help with finding the F129 - I can only find the G65 when looking on the car.

I've checked service manuals, wiring diagrams and all, but I cant find its location.

Any help will be much, much appreciated!

 

All the best,

Kasper

[Breezy_Pete]

What device has generated those fault codes? I suspect it is not giving good information.

No F129 in any Roomster circuit as far as I can see, therefore it doesn't exist, G65 is doing that job instead (and better).

 

[Kapper]

Hi, Pete.

 

I'm using a rather cheap HEX/usb-thing, so I was a bit uncertain and suspected what you just pointed out - no F129 but G65 instead.

Glad to hear I'm not blind  - and that I can stop looking for it and focus elsewhere.

Compressor won't kick in, so I'll have to figure out a way to test if clutch is getting power/data/else that tells it to engage. Right now it just seems offline/dead.

 

Thanx a million for the quick answer, Pete!

- Kasper

[Breezy_Pete]

You won't find a clutch on your compressor either. Proportional solenoid valve N280 varies the displacement of the pump, axle is always spinning.

[Breezy_Pete]

Broken wires on the way to N280 is certainly one possible failure that might explain your troubles.

[Kapper]

Fantastic!
I'll do that tomorrow - thank you so much, Pete.