Well it may be just a story but you asked for a simple one; so here it is.

The possibility exists that you have open circuited the coolant temp sensor. The dual conditions of fans operating and A/C clutch not, combine to make me think that the controller thinks the engine is real hot. A condition that calls for high blow on the cooling fans and compressor cut-off. Sounds like a good story to me (bg).

BTW I thought the Klima relay was next to the ABS controller but that may only be on gas models. I'd have to look in the book.

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Steve Brotherton
Owner 24 bay BSC
Bosch Master, ASE master L1
26 years MB technician