Cause | Method of elimination |
The heater motor does not work | |
The heater motor electric motor fuse is faulty | Check the motor fuse, replace if necessary |
The heater motor switch is faulty, the contacts are corroded | Check for voltage on the heater motor electric motor. If not, remove the motor switch and check. Clean the connections |
The motor's graphite brushes are worn out | Check for voltage at the motor contact with the ignition and switch on. If present, remove the motor, check, and replace the graphite brushes if necessary |
The motor does not work only on one stage | |
Pre-resistance is faulty | Replace the connection board |
The heating does not turn off with the heating control levers | |
The flexible cable of the heating valve is damaged or out of adjustment | Adjust or replace flexible cables |
The heating is too low | |
Low coolant level | Check the coolant level, top up if necessary |
Coolant thermostat is faulty | Check the coolant thermostat, replace if necessary |
Noises in the motor area | |
Penetration of dirt, leaves | Remove the motor, clean it. Clean the air duct |
The fan wheel is out of balance, the bearing is faulty | Remove the motor and check for ease of movement |
[The original article is available at: VWmanual]
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