1997 A4 B5 1.8T air conditioner not working
Hi All,
This problem seems to come up a bit so I thought i'd post it as it progresses (happy to get advice too
Stage 1, Get regas // Informed A/C compressor not engaging
On closer inspection A/C clutch not engaging
Took of bottom mud tray
Unplugged green power wire that goes from a/c (to aux fan I believe)
Connected straight from battery + to wire with car running
Clutch ENGAGED!!!
Must be a problem between fan and ac I imagine
Apparently there is a relay behind the headlight (driver)
Will check that and try to follow wiring up (seems like it works to fan as this engages when a/c turned on.
Will keep you all posted!
Regards.
This problem seems to come up a bit so I thought i'd post it as it progresses (happy to get advice too

Stage 1, Get regas // Informed A/C compressor not engaging
On closer inspection A/C clutch not engaging
Took of bottom mud tray
Unplugged green power wire that goes from a/c (to aux fan I believe)
Connected straight from battery + to wire with car running
Clutch ENGAGED!!!
Must be a problem between fan and ac I imagine
Apparently there is a relay behind the headlight (driver)
Will check that and try to follow wiring up (seems like it works to fan as this engages when a/c turned on.
Will keep you all posted!
Regards.
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