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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1987 honda civic


Disconnect the electrical at the top. Sometimes you can get the fan out and then the shroud-due to limited space. They would both come out from the top.
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.

Just looked at a diagram: If your car is fuel injected, check fuse #13, a 15 amp blue fuse. And same if carbureted, fuse #13-this fuse is for the relay and the fan motor. If carbureted, also check fuse #20-a 20amp fuse.
There are no computer controls for the fan on an '87. there is a thermo switch-at a set temperature, the switch will close-completing the ground path for the fan motor. There is also a radiator fan timer switch, tied in with the thermo switch and the air temperature sensor.
Sound complicated? Well, it is, even with no computer controls. If the fan motor is good, check or replace the thermo switch. Be sure and check those fuses, also. If no help, a tech will probably have to diagnose it.

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Volkswagon POLO 2001 Manual Problem: thermo fan not working. Hi all, I have since ordered and replaced the fan with a another fan and the fan still does not work!! Could it be the fuse? Initial...


CHECK TO SEE IF POWER GOING TO COOLANT FAN AND COOLANT FAN THERMO SWITCH.THERMO SWITCH LOCATED BOTTOM OF RADIATOR ON THE LEFT HAND SIDE.IF POWER GOING TO THERMO SWITCH THEN SWITCH IS FAULTY.IF NO POWER GOING TO THERMO SWITCH OR COOLING FAN.CHECK LARGE FAN FUSE IN THE ENGINE COMPARTMENT AND YOU HAVE FUSE 16 IN FUSE HOLDER.IF FUSES GOOD YOU HAVE SHORT IN THE FAN WIRE OR FAULTY FAN CONTROL MODULE.SHAKE FAN WIRES IF FAN WORKS PROBLEM IN THE FAN WIRES YOU HAVE A SHORT IN THE WIRES..

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The radiator fan does not work and the car run hot.I tested the fan motor and it work.


It will most likely be a Thermos fan switch if you go to parts store git a new one they can point out to you where it is located ,most of the time they are in the head near the thermostat ,but some times they are in the radiator hope this helps . IT could also be the relay,you could ground the thermo fan switch it should cause the fan to run then you will know that the relay is OK ,hope this is some help ,feel free to ask if we can be of any further assistance Thank you.

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It get hot, the fan does not work, it work only


Easy, On all cars with a electric fan , yours, There is a thermo switch. This switch is often located on or near the housing for the thermostat. It can just stop working if you've recently been in a crash, or just needs the coolant changed it will stop. When the switch doesn't open the fan gets no power and therefore no fan. TO test simply locate said switch, ask a auto supply store like Napa where the switch is if you can't find it. Then unplug it. The fan should turn on when the engine is running. if not you may want to replace it anyway, they are usually only $20. then you'll know that is not it. Other than that your looking for a radiator shop.

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1 Answer

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if you make the contacts on the plug that connects to the thermo switch, does the fan work (both speeds?)?

if not, then it could be the fan control module or a fuse on there.

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1 Answer

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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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2 Answers

1998 Volkswagon Beetle - Overheating


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:
  • entirely removing the thermostat (not applicable in cold regions);
  • 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

Aug 15, 2008 | 1998 Volkswagen Beetle

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