millo777
MB Enthusiast
- Joined
- Mar 9, 2011
- Messages
- 1,250
- Location
- Swansea, Dubai, Riyadh
- Car
- 1997 W140 S600L/2003 S211 320cdi
After coming precariously close to reaching 120c in a motorway tailback earlier today, I had a look at the viscous fan, which I think is dead (can be freely spun with the engine off, and continues freely rotating for a few seconds after the engines is switched off)
To add insult to injury, the auxillary fans don't seem to be working either. At least, the don't come on when the ac is switch on, which is what I was expecting. The engine was however cold.
Are they supposed to come on with the AC, or via a temp sesnor in the coolant?
What is the best way to test them and any other related parts, relays, thermo switches etc?
To add insult to injury, the auxillary fans don't seem to be working either. At least, the don't come on when the ac is switch on, which is what I was expecting. The engine was however cold.
Are they supposed to come on with the AC, or via a temp sesnor in the coolant?
What is the best way to test them and any other related parts, relays, thermo switches etc?