Thermo Fan Switch
The Termo fan switch is mounted on the radiator core.The thermo fan switch is very important as it the switch to turn the radiator fan on and off. The switch is closed when it is cold and when it reaches a certain temperature there is an open circuit to turn on the fan.
We connected a multimeter to check resistance and put it in a bowl of water with the stove heating the water.We got a reading of 0.3 ohms which showed us that the switch was closed. When the temperature increased to about 93 degrees the meter read OL, which showed us that the switch was now open.So the fan would go on at around 93 degrees Celsius to cool the radiator. This is not a thermistor. The thermo fan switch is working fine and is according to the manufacturer's specifications.
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