Question about Mercedes-Benz ML320

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Cooling fan will not turn off

My Mercedes ML320 - 2002 Cooling fan will not shut off? How do I get it to stop

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  • 227 Answers

Probably a bad relay, pull it from the relay panel to shut the fan off.

To diagnose you can try a new relay, but you might also have a bad coolant temperature sensor on that circuit.
Or the climate controll is going south.

Posted on Oct 23, 2013

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Posted on Jan 02, 2017

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  • 1596 Answers

SOURCE: cooling fans won't shutoff

If With the Ignition OFF they are On and You remove the Relay and They Turn OFF Sounds as if the Cooling Fan RELAY is STUCK ON Replace The Relay is What I would Advise

Posted on Feb 12, 2009

emissionwiz
  • 76846 Answers

SOURCE: cooling fan not working

The fans only run when the engine reaches approxminatly 235 degrees F. on the guage that is near the end of scale just before guage show "HOT" I don't think you have a problem, allot of folks out there don't know about this.

Posted on Aug 22, 2008

motor1258
  • 6674 Answers

SOURCE: 2005 vw jetta radiator cooling fan wont shut off

Check for a switch at lower part of rad. Should see a wire harness & plug on a sensor at bottom of rad. This sensor/switch also operates fan on/off according to coolant temperature. You may need to disconnect battery to get at it safely.

Posted on Jan 16, 2009

  • 2920 Answers

SOURCE: fan stopping on when stopped draing battery

sometimes they stay on for a bit to allow the engine to cool down after being driven.even after you shut the car off. helps to cool the engine better and faster

Posted on Feb 13, 2009

jasperoni
  • 203 Answers

SOURCE: 99 MERCEDES BENZ C230 AUXILIARY COOLING FAN RELAY

I thought they where either on the side of the core support(follow the wire harness and it should go to the relay). If not remove the fuse box lid and then take out the screws retaining the lid housing and you will find a series of relays. There will be one for high speed (engine uses this when temp. is to high) the other is a low speed relay(this is the climate control aux. fan relay) They may have fuses on top of them I know the older models did. I hope I have been helpful.

Posted on Sep 09, 2009

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Check if condenser fan is working.
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OR JUST REMOVE BATTERYGROUND CABLE.
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Fan stopping on when stopped draing battery


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1 Answer

Cooling fans won't shutoff


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