22 · Diagnostics

Heater noisy / (in passenger compartment)

Make: Fiat
Model: Multipla Factory Service Manual
Year: 1998–2010
Section: Noisy / vibrations › Heater noisy / (in passenger compartment)

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Fault diagnosisHeater noisy / (in passenger compartment)

HEATER NOISY / (IN PASSENGER COMPARTMENT)

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

1	ELECTRIC FAN CHECK	All OK	Problems met	Operation
		Results of the tests
	Check the climate control fan and ensure the following in particular: 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. 5020A30
2	CHECKING THE AIR DUCTS	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 3	Air ducts obstructed or damaged	Restore the operation of the ducts and the vents (see Assembly 5010B)
3	DISTRIBUTOR DUCT CHECK	All OK	Problems met	Operation
	Check the operation of the air conditioning system and check in particular the operation of the climate control fan distributing and mixing controls Check whether there are foreign bodies or damaged parts inside the duct distributor assembly which could cause noise	Continue to Step 4	Presence of foreign bodies or damaged parts inside the duct distributor assembly	Repair or replace the bowden cable (see Assembly 5020B)
			Presence of foreign bodies or damaged parts inside the duct distributor assembly	Repair or replace the flap Op. 5020A24
			Presence of foreign bodies or damaged parts inside the duct distributor assembly	Overhaul the duct distributor assembly Op. 5020A24
4	CHECKING 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'

‹ Prev Climate control system noisy / (in passenger compartment)Next › Engine fan noise

Parts & tools for this job For 1998 Fiat Multipla

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