L51 HEATER NOT WORKING / AT DIFFERENT SPEEDS' - Alfa - 156 - eLearn

The passenger compartment air fan comes on, but not at the different speed settings.

1	CLIMATE CONTROL FAN ELECTRICAL CIRCUIT CHECK	All OK	Problems met	Operation
		Results of the tests
	Check, in order: climate control fan adjustment resistance climate control fan controls connection between climate control fan and its controls, via the adjustment resistor ( See E6010 HEATER ).	Continue to Step 2	Connections not correct	Restore the connections
			Electric fan defective	Replace the electric fan Op. 5020A30
			Fan regulator defective	Replace fan resistor Op. 5020A44
			Fan controls defective	Replace fan controls Op. 5020B10
2	CHECK CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists	Search for the fault starting from another symptom'