1997 BMW 528 cooling problem

Tiny
JOE1998
  • MEMBER
  • 1997 BMW 528
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 140,000 MILES
Yesterday, was driving on freeway and the car just started getting hot to the red, I checked the coolant level it was good, then I checked the fan, which it only has one (no condensor fan) and it wasn't turning on when the temp rose. I then turned the ac on and the fan clicked on, so what should I do, Is it the fan switch or the thermostat, or? Also the heater doesn't blow warm anymore, just cool?
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Tuesday, February 5th, 2008 AT 12:43 AM

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Tiny
RASMATAZ
  • EXPERT
Replace the thermostat

ELECTRIC COOLING FAN PROBLEMS

A fan failure, or a failure of the fan relay or control circuit is bad news because it can allow the engine to overheat.

Five things may prevent an electric cooling fan from coming on:

Defective temperature switch or coolant sensor Engine thermostat is stuck OPEN (engine never gets hot enough to turn on the fan)
Failed fan relay
A wiring problem (blown fuse, loose or corroded connector, shorts, opens, etc.)
Bad fan motor
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Tuesday, February 5th, 2008 AT 4:18 AM

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