SLK/R171: Cooling Fan Always On
Thread Starter
Newbie
Joined: May 2022
Posts: 2
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R171 SLK 350
Cooling Fan Always On
Struggling with a 171 SLK350. Main radiator cooling fan is on at 100% as soon as you switch on ignition. I had the main coolant temperature switch changed but no difference and all temps read OK. The aircon works OK and there is no code for Air Conditioning Condenser Pressure Sensor (pressure reads about 5.5 bar) which from Googling is a common fault which makes the fans run all the time.
There is a P0693 code - engine and AC electric fan suction fan output stage. The mechanic (non MB) reckons it is a cooling fan or fan ECM fault (engine cooling rather than aircon issue) but doesn't want to 'throw parts at it' - especially as the fan unit is expensive. Does anyone have any ideas where I can go from here?
Thanks
There is a P0693 code - engine and AC electric fan suction fan output stage. The mechanic (non MB) reckons it is a cooling fan or fan ECM fault (engine cooling rather than aircon issue) but doesn't want to 'throw parts at it' - especially as the fan unit is expensive. Does anyone have any ideas where I can go from here?
Thanks
Junior Member
Joined: Aug 2017
Posts: 24
Likes: 2
From: Saguenay, QC, Canada
SLK 280 R171 2007 Black / Audi A4 Quattro V6 3.0 2002 Silver
