Installing and dismantling the fan thermostat and checking it (VW Transporter T3)

The radiator contains two thermostats that control the electric fan. Thermostat 1 is located at the top, thermostat 2 at the bottom.

Thermostat 1 turns on at a temperature of 93-98 degrees, and turns off at a temperature of 88-93 degrees.

The second stage thermostat turns on at a temperature of 100-105 degrees and turns off at a temperature of 95-100 degrees.

Dismantling

Disconnect the wires from the regulator and unscrew it.

Installation

Fit the regulator with a new seal and screw it in.

Connect the electrical wires.

Examination

To check whether the regulator turns on at all, turn on the ignition.

Check the fan motor fuse and replace it if necessary.

Check whether the radiator in the area of the thermostats heats up at all.

Remove the plugs from the thermostat, connect the terminals of both wires together. If the fan now works, replace the thermostat.

If the fan does not work, check the wiring according to the electrical diagram. Check the reliability of the contacts. If necessary, replace the fan motor.

Check the operation of the new thermostat. Warm up the engine and let it idle until the fan turns on.

(The original article is posted on the website vwmanual.ru)