Question about 3Com Fan tray - for Switch 4050 / 4060

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Cooling fan runs continuasly even with ignition is no switched on

2002 406 estate

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  • gtdukltd Jun 26, 2008

    Thanks for your help, apparently there was a short in the Electrcs in the pasangers footwell!. Keep up the good work! If I ever nead to I will us your services again. Thanks again. gtdukltd


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Even when the key is off with the engine cool after a few minutes? Or just a few minutes after it is turned off with the key?

Check or change your thermostat and flush the radiator with the heater running on hot as it can be. Can you see inside the radiator? If you can is the water flowing good? If it is not after you change you thermostat and it still runs hot then it is your water pump. Is it running hot?

Please answer the questions before you rate this.

Posted on Jun 22, 2008

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Posted on Jan 02, 2017

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First use a test light and make sure you are getting voltage to the fan with the ignition key on and the ac selector in on position.If no voltage check fuse in fusebox or (in linefuse ), If fuses are good check the fan relay switch. If all are good check for broken wire or bad ground.If you are getting voltage to the fan motor or the test light lights up then chances are you have a bad fan motor.

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