Radiator cooling fan
10-06-2017, 04:59 PM
#1
Newbie
Thread Starter
Radiator cooling fan
when i start the car,a the radiator cooling fan run at maximum speed when the car is cold and it continue at maximum speed during driving with hot engine. The temperatur is constant approx 90 degres celsius. I have ben to my lokal Mercedes workshop and they have run diagnosticera programs etc and can not find any error codes and bad values, They do not Knowles what to do ?.
has anyone any god ideal hon to continue .
has anyone any god ideal hon to continue .
10-07-2017, 05:07 AM
#2
Senior Member
There is PWM communication between the fan and the ECU. If this is lost then the fan runs at full speed.
There are many posts about this, search the various MB forums for resolutions, sometimes a bad fan, sometimes an ECU issue or a harness problem.
There are many posts about this, search the various MB forums for resolutions, sometimes a bad fan, sometimes an ECU issue or a harness problem.
The following users liked this post:
Hackemb (10-07-2017)
10-08-2017, 02:08 AM
#3
Newbie
Thread Starter
Alternator issue
orginal alternator with oem A271 154 1402, TG12C026, 2543296B (120A) - valeo have seen its best days and have to be changed.
The New one is valeo TG12C026, 439611 (120A) and it Worked ok except the coolar fan starten work constantly. I noticed afterwords that it is mentioned for vehicle with ac (manually controlled), could that be the issue with the radiator fan ?
valeo has an other alternator 439610 (150A) for vehicle with automatic climate control, could that be the soluition.
The New one is valeo TG12C026, 439611 (120A) and it Worked ok except the coolar fan starten work constantly. I noticed afterwords that it is mentioned for vehicle with ac (manually controlled), could that be the issue with the radiator fan ?
valeo has an other alternator 439610 (150A) for vehicle with automatic climate control, could that be the soluition.
