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BMW 3-Series (E90 E92) Forum
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Electric Fan - Once on -- Doesn't turn off!
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02-13-2009, 07:21 PM | #1 |
Captain
289
Rep 864
Posts |
Electric Fan - Once on -- Doesn't turn off!
Ok -- looks like I have encounterd my first problem - at 20k.
. Once the fan comes on after about 20 min drive -- fan turns on and fails to turn off. . . My guess that since the water temp sensor is not on & I have checked the water level & oil -- must be a temp themocouple switch failure. Either this or a much bigger over temp issue. . . I did a search & did not seem to produce any common thread as to a fleet wide failure with temp sensor or thermostat related failures. . Thoughts?? |
02-14-2009, 03:11 AM | #2 |
Private First Class
8
Rep 132
Posts |
I had the same thing happend to me recently. It turns out to be the Electronic Thermostat that fails. As a precaution the ECU puts the fan on flat out as it has no idea what the thermostat is doing.
I had my thermo replaced under warranty. Fritzables. |
Appreciate
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02-21-2009, 08:01 AM | #4 |
Captain
289
Rep 864
Posts |
Thermostat Replaced
Correct - the thermostst was replaced - they did have to order the part - 2-days.
. The dealer changed / flushed the brake fluid while they had the car - so ALLs Good in the NeighborHood. . . |
Appreciate
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