Question about 2003 Volkswagen Beetle TDI

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Enginie is extremely hot, niether one of the radiator fans are working, fans are electric and i assume controled by a thermo switch of some kind

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  • laytonwhip Aug 17, 2008

    Same issue. Engine isn't as hot as it sounds like the above's is, but of course the AC is not getting cold unless car is moving. Both fans bad or some type of relay issue?

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There is a flat fuse on the battery cover that is blown. There is a small plastic flap you can flip open. There are 5 or 6 fuses that go between the weres visible. it is probably a 25 of 30 amp fuse. about $2. each. The dealer wanted 125 to repair. it took about 1 minute total time and a 10mm socket

Posted on Sep 04, 2008

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We mechanics will tell you to test the fan motor with jumper wires from the battery before you decide to pull it off. On most cars, the computer turns the fan on through a cooling fan relay. On your '87, it is possible that a thermal switch on the radiator may turn the fan relay on at a set temperature. One would have to see a wiring diagram.

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Check that the fans are still working .Check that the thermo switch is working.Check that you have power to the thermo switch. and if not check relay/supply of power.Unsure with your model but the thermo switches are usualy screwed into the radiator but could be mounted on the engine.You can check your fans by running a piece of wire from the positive terminal of the battery to the positive side/wire of the fans.As long as the fans are earthed as well they should work and if not then the fans will need to be replaced.

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Hi,

To my knowledge, the thermal switch is normally located attached to the radiator. This senses the coolant's temperature inside the radiator and upon reaching a predetermined level switches on the radiator fan. Further, to my understanding, either the A/C or the heater must be engaged for the fan to activate.

As to your other concern, overheating; In my country, most overheating issues on Volkswagen models are resolved by:
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  • wiring the fan to switch on once the engine is running (with or without the A/C or heater being turned on);
  • replacing the radiator thermal switch for the fan to a lower temp.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa

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