If the fan does not turn on when the engine warms up at the right time, check the thermal switch located on the side of the radiator:
- turn on the engine and let it run until the fan turns on;
- slowly remove the cap of the expansion tank, gradually releasing steam;
- place the thermometer in the expansion tank. The temperature should be between 92-97°C. At this temperature, the fan runs at the first speed. At a temperature of 99–105°C, the fan operates at the second speed. If the fan does not turn on, then pull both wires from the thermal switch and connect them to each other. Turn on the ignition. The fan should turn on immediately. If this happens, replace the thermal switch and then check again.
The fan motor is protected by a fuse that may blow. If the fuse is OK, then check the fan motor:
- disconnect the wire plugs and install a jumper between the red-black wire terminal and the positive pole of the battery;
- connect the brown wire terminal with the negative pole of the battery with a jumper.
If the fan does not work, replace it. The cause of the malfunction may be damaged wires.
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