39. Heater fan does not work
1. Fan motor fuse defective.
2. Faulty fan switch - check if voltage is applied to the preresistors, remove and check the fan switch.
3. Faulty fan motor. Check if it is receiving voltage with the ignition on and the fan switch closed - if voltage is supplied, replace the motor.
40. The heater fan does not work on one of the stages
1. Faulty preresistor.
41. The heater is not switched off by the regulator
1. Faulty switch.
2. Control mixing damper actuators are damaged or poorly movable
42. Too low heating power
1. Insufficient coolant level.
2. Malfunction of the control panel for the operation of heating / ventilation / air conditioning systems (HVAC) - check the control assembly.
43. Noise in the heater fan area
1. Dirt, leaves got in - remove the fan and clean it, clean the air channel.
2. The impeller is out of balance, the bearing is damaged.
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