Quote:
Originally Posted by 400E
Sorry, Paul, but that's not true. Low speed aux fans only come on when refrigerant pressure is above the set point. On my M119, aux fans generally do not come on when ambient temps are below 80 degrees F even with AC on.
I'm with buckwheat - I would wonder about how "good" the water pump is. They are known to have impeller problems, so they can still pump coolant but not as efficiently as they should. As I recall, this is a particular problem with aftermarket pumps, but even OE ones can eventually wear.
The fact that coolant temps are getting to the point that they are really seems to point to inadequate coolant circulation.
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I disagree. With the a/c on, the aux fan should be on nearly all the time.
I think we'll have to leave it to Enrique at Mr. MB Motors. He's had more than enough time to figure this one out.
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Paul S.
2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".
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