the urgent problem class c 220 cdi w204

[crteam]

Hi friends I have a problem on a c w204 that after putting in motion the fans run at full throttle.I think both the form and the fans, but I agree they are very safe.in diagnosis, the parameters are ok and no fault.and I take this opportunity to ask if anyone in the Campania region has an ecu sam back too bad for this car . thanks friends

[redline]

hi do you pay attention to the sensor refrigerant gas ac if you block with a high value, the ecu understands that the ec high blood pressure and start the fans

[blackwolf76]

The fans are managed by the module fuses in the front... even if it might be a problem of sensors, both AC and engine temperature.

[crteam]

I unplugged the coolant sensor and it does the same I try to change the fan module that is mounted near the fan itself . no one, and never happened?

[beppe.c]

if with the ac off the fans should be the same no ? a problem of ac.if not, then I would check the values in the diagram and see which sensor value is incorrect.
I would do this first, then the substitution of other components.