Climate control system noisy'' / (in passenger compartment)

Make: Alfa Romeo
Model: GT Factory Service Manual
Year: 2003–2010
Section: Noisy'' / vibrations › Climate control system noisy'' / (in passenger compartment)

Fault diagnosisClimate control system noisy'' / (in passenger compartment)

CLIMATE CONTROL SYSTEM NOISY'' / (IN PASSENGER COMPARTMENT)

The climate control is working properly, but there is excessive noise coming from the distributor duct assembly

1	ELECTRIC FAN CHECK	All OK	Problems met	Operation
		Results of the tests
	Check the climate control electric fan. In particular, ascertain: That there are no foreign bodies inside the fan casing; there are no vibrations at the various speeds (causing operation with the fan switched off, but the electrical connection engaged)	Continue to Step 2	Fan dirty	Clean the fan casing and all the ducts
		Continue to Step 2	Electric motor noisy, fan unbalanced	Replace the electric fan Op. Op. 5040C30 FAN MOTOR - R+R
2	ACTIVE DIAGNOSIS WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Using the diagnostic equipment (Examiner Plus or Smart), carry out (in the climate control control unit ambient) the active diagnosis of the fan at the different speeds	Continue to Step 3	Electric fan operation irregular	Replace the electric fan Op. Op. 5040C30 FAN MOTOR - R+R
3	DISTRIBUTOR DUCT CHECK	All OK	Problems met	Operation
	Check for the presence of foreign bodies and damaged parts inside the distributor duct assembly	Continue to Step 4	Presence of foreign bodies or damaged parts inside the duct distributor assembly	Overhaul the duct distributor assembly Op. 5040C10
4	AIR DUCTS CHECK	All OK	Problems met	Operation
	Check that the air ducts inside the dashboard and the vents are intact and that there are no foreign bodies which could cause noise	Continue to Step 5	Ducts obstructed or damaged	Repair the ducts and vents
5	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis

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