W639 Viano Air Conditioning issues
07-13-2022, 10:36 AM
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W639 Viano
W639 Viano Air Conditioning issues
I've recently bought a 2006 (55) Viano.
Had the Air conditioning checked and re-gassed. It held vacuum and pressure when tested with nitrogen so was merrily refilled by National Aircon. 5 days later it not working. One drive it was cold, then an hour later on the next drive it was not.
I have had National Aircon out and the system is still full and pressurized, so there is either an electrical or compressor fault.
I cannot for the life of me find the AC fuse or relay - the only diagrams ive found say fuse block F4 and Fuse 27 - neither exist for me.
The single wire connector to the compressor is reading 0.9v when AC on or off via the dash button.
What should I be looking at here...pressure switch (what should the resistance be)? Fuse? Relay?
Thanks in advance,
Rob
Had the Air conditioning checked and re-gassed. It held vacuum and pressure when tested with nitrogen so was merrily refilled by National Aircon. 5 days later it not working. One drive it was cold, then an hour later on the next drive it was not.
I have had National Aircon out and the system is still full and pressurized, so there is either an electrical or compressor fault.
I cannot for the life of me find the AC fuse or relay - the only diagrams ive found say fuse block F4 and Fuse 27 - neither exist for me.
The single wire connector to the compressor is reading 0.9v when AC on or off via the dash button.
What should I be looking at here...pressure switch (what should the resistance be)? Fuse? Relay?
Thanks in advance,
Rob
