How to disassemble Jetta's heater water tank?

Remove the steering wheel first, then the instrument panel, and then the warm water tank. To remove the warm water tank, the central control instrument panel must be removed. Drain the coolant first, and then remove the engine room warm water pipe, central console, the whole heater box assembly and heater box.

The disassembly method of Jetta heater box is as follows: (1) Drain the coolant in the cooling system. (2) Remove the control panel. (3) Remove the cable fixing piece on the left side of the heater and remove the screw on the terminal. (4) Move the wire connector behind the blower motor. (5) Remove the vacuum tube and lamp wire behind the heater control device. (6) Place a container under the engine and under the water supply pipe of the heater behind the cylinder head. (7) Remove the heater water supply pipe behind the cylinder head. Principle of warm water tank: In addition to a radiator in the engine compartment, there is also a heat exchanger in the dashboard of the cab, and the antifreeze radiated from the engine flows in the middle. Turning on the warm air can improve the heat dissipation in the car, which is especially useful for some Jetta cars to run long distances. It uses the cooling water of the engine as the working medium and blows it into the car from the same air outlet under the action of the blower to achieve the purposes of heating, ventilation and defrosting. There are two main ways of air intake: one is indoor air circulation, and the other is outdoor fresh air entering the room for ventilation circulation. The blower is electrically driven and also affected by the engine speed. Even if the engine speed is very low, it can still perform the functions of heating and defrosting.

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