Cooling fan running on high on cold start
#1
Cooling fan running on high on cold start
I have a 2004 s500 and the cooling fon is running on high on a cold start also the outside temp is irratic . The car is driving normal and the temp gauge is normal . Anyone have any idea ,it could help me . I am new to this forum ,first time user
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advsub (04-22-2016)
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advsub (04-22-2016)
The following users liked this post:
advsub (04-22-2016)
#6
Thanks for all the answers . No I don't have in defrost mode . And I know it is not a normal operation . I am going to a garage to run as an on it ,hopefully this will lead me the source of the problem
Thanks
Thanks
#7
There was some rain and I took the Ecu apart and clean it . Ther is one other issue that I did not mention on my previous post . The air condition goes to economy mode even and it is showing a low pressure code (1241 ) after driving for a little while . The out side temp reading is not correct when all this is going on
Thanks for all the help
Thanks for all the help
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#8
Senior Member
There are only a few ways the cooling fan will run at a high rpm.
1) MAX Cool. from the A/C
2) Bad ECU, however this is usually not the case, because the car probably won't start with a bad ECU.
3) A temp sensor, Oil, Coolant, A/C is malfunctioning. Although it may say Normal for the Coolant, maybe another sensor has failed and triggered the fan to spin at a high rpm.
Does the fan return to normal after the engine warms up?
1) MAX Cool. from the A/C
2) Bad ECU, however this is usually not the case, because the car probably won't start with a bad ECU.
3) A temp sensor, Oil, Coolant, A/C is malfunctioning. Although it may say Normal for the Coolant, maybe another sensor has failed and triggered the fan to spin at a high rpm.
Does the fan return to normal after the engine warms up?
#9
When the car reach normal condition the fan operate normal . Also understand cold or rain the problem is more apprant . The ac will shutdown with 1241 as a code (low freon pressure ) . With gauge hook up to the ac system the pressure is Normal.
#11
Senior Member
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fan running when engine is cold. reasons and fix. Read Here
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Brazzknuckzz415 (01-04-2024)