Heater malfunctions (Opel Astra H)

39. The heater fan does not work

1. The fan motor fuse is faulty.

2. The fan switch is faulty - check if voltage is supplied to the pre-resistors, remove and check the fan switch.

3. The fan motor is faulty. Check if voltage is supplied to it with the ignition on and the fan switch closed - if voltage is supplied, replace the motor.

40. The heater fan does not work at one of the stages

1. The pre-resistor is faulty.

41. The heater does not turn off with the regulator

1. The switch is faulty.

2. The actuators of the regulating mixing flap are damaged or do not move well

42. Heating power too low

1. The coolant level is insufficient.

2. Malfunction of the heating/ ventilation/air conditioning (HVAC) control panel — check the control assembly.

43. Noise in the area of the heater fan

1. Dirt or leaves got in - remove the fan and clean it, clean the air duct.

2. The impeller is out of balance and the bearing is damaged.