All Things Mk5 > How to Guides / Troubleshooting

Air Con Clutch

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csrigo:
Hi folks.

My AC compressor is basically stuck on all the time. The clutch is stuck engaged. The alternator pully still operates correctly in that it will freewheel one direction and lock in the opposite if the armature (rotor) is locked in place.

Question is. Has anybody just changed the clutch or pully on the AC compressor instead of the compressor itself? The comp is working and is trying to but wondering if I can just swap the clutch out instead....and if so will the comp need removed?

Everything still moved but is starting to make a slight noise and naturally not good for it.

Cheers

FJB:
The compressor does not have a clutch, it is controlled by a solenoid valve. The pulley that you a referring to is meant to be engaged all the time. 

csrigo:
Sorry mate terminology might be wrong but I think it does have a kind of "clutch" setup. Solenoid valve engages electromagnet which pulls the inner clamp plate (inner part of the pulley) and locks it to the outer pulley essentially when the compressor is engaged. If you watch your pulley with the AC off only the outer part will turn, switch it on and the whole pulley rotates.

Solenoid controls the magnet is what I was under the impression? I may be wrong  but I thought you can change the electromagnet part etc seperate?

colesey:
Is this the part needed?

https://www.ebay.co.uk/itm/Air-Conditioning-A-C-Delphi-Compressor-5N0820803-For-Seat-Skoda-VW-Repair-Kit/232378514061?fits=Model%3AGolf%7CPlat_Gen%3AMK+V&hash=item361ad6ba8d:g:WOsAAOSwFrtbNLic

FJB:

--- Quote from: csrigo on March 10, 2021, 06:50:51 pm ---Sorry mate terminology might be wrong but I think it does have a kind of "clutch" setup. Solenoid valve engages electromagnet which pulls the inner clamp plate (inner part of the pulley) and locks it to the outer pulley essentially when the compressor is engaged. If you watch your pulley with the AC off only the outer part will turn, switch it on and the whole pulley rotates.

Solenoid controls the magnet is what I was under the impression? I may be wrong  but I thought you can change the electromagnet part etc seperate?

--- End quote ---

No there is not a magnetic clutch on most ac compressors fitted to the climate control system on the gti, the pulley is permanently engaged, the climate control module send a signal to a solenoid valve on the rear of the compressor, this valve turns the flow of refrigerant through the compressor on and off.

You need to check the part number sticker on the front of the compressor to be sure, if your compressor looks like this you definitely do not have a clutch.

https://www.ebay.co.uk/itm/GENUINE-AUDI-A3-S3-8P-VW-GOLF-MK5-GTI-2-0-A-C-AIR-CON-COMPRESSOR-PUMP-1K0820803N/402698207080?epid=1709347628&hash=item5dc2aeff68:g:RrgAAOSwhkFgLnNo

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