» » »


Ask Your Question

2000 BMW 323i Question: Intermittent overheating & interior fan



Jim Pa, Pasadena, CA, December 09, 2010, 17:01

Intermittently the engine overheats and the cooling fan does not go on; thermostat has been replaced; is it the fan relay?
Interior fan at times goes on & off with no key in ignition

1 Answer
Flag This
  • Answer #1

    December 14, 2010, 07:10

    Replace fan speed resistor for the interior fan issue.
    Check the wiring and readings of the coolant sensor connected to the bottom radiator hose. Does the fan kick in when A/c is actuated? as this should be your stage 2, which is also your overheat stage.
    Check water pump. The impeller could be free spinning on the shaft

    Flag This
  • Reply

    Visitor, December 14, 2010, 10:23

    The fan does not always kick in when the A/C is turned on. The mechanic that looked at it said it's the fan module; I will mention your suggestion.
    Thank you.

    Flag This