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Re: 1998 Volkswagon Beetle - Overheating
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
The Thermo switch is located on the left lower side of the radiator. It is best viewed from under the car with the left lower splash shield removed. From under the car look past the drain tube and you will see the brass nut and electrical connector. Thats it.
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check the thermo switch on the radiator use some wire and connect the pins, if the fans come on then change the thermo switch, if they don't come on then the relay needs replacing. thermo switch works off negative feed so there should be no sparks if their is a spark then the electrics is a problem.
The fan circuit consists of a 30 amp fusible link and a relay in the engine compartment fuse/relay block and the thermo-switch on the little coolant manifold near the driver side end of the engine. The relay is the one on the far right side with the fusible link just below it. I would question the thermo-switch first. To test the circuit you can short the wire that goes to the thermo-switch to ground, with ignition switch on, and the fan should run. It not then check and relay. See the attached diagram for thermo-switch location. Do not take the part numbers on the diagram for gospel. I drew this up several years ago. I do not have my Camry so I cannot totally verify the above. I tried to post an answer several days ago but was not logged in at the time and they would not post it!
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..
Bad thermo-time switch. This sensor will tell the ECU if engine is cold and will add fuel to the oxygen mixture. When it's in operating temperature it will tell the ECU for correct preset fuel mixture. Also if you have a 5th injector the ECU will know when to shut it off so you won't have a rich mixture. Also visa versa depending on the data it receives from the thermo switch.
Hi, They are controled by a thermo-fan switch, when coolant reaches a certain temperture fan switch turns on radiator fans and brings temperture back down. Thermo-Fan switch is located bottom of radiator.