S55 Heater/climate control noise (passenger compartment)

Make: Fiat
Model: Seicento Factory Service Manual
Year: 1998–2010
Section: Noise and vibration › S55 Heater/climate control noise (passenger compartment)

DiagnosisS55 Heater/climate control noise (passenger compartment)

The heater works correctly, but noise can be heard leading from the distributor manifold unit

Step	Validity	Operation to be performed	Test results
Step	Validity	Operation to be performed	OK	⚠	🔧
1	Check fan	Check climate control fan. In particular, check the following: – that there are no foreign bodies in the fan basket – that there are no vibrations at different speeds	All OK Go to Step 2	Problems found	Intervention
	Dirty fan		All OK Go to Step 2	Clean fan basket and manifolds
	Motor noise, unbalanced fan		Replace fan PROCEDURE OP. 5020A34
2	CHECK AIR MANIFOLDS	Check that the air manifolds in the dashboard and the air vents are intact and do not contain foreign bodies which could cause noise	All OK Go to Step 3	Problems found	Intervention
2	Obstructed or damaged air manifolds		All OK Go to Step 3	Restore manifold and vent operation PROCEDURE 5010B
3	CHECK DISTRIBUTOR MANIFOLD	Check the distributor manifold unit is intact and does not contain foreign bodies which could cause noise	All OK Go to Step 4	Problems found	Intervention
3	Obstructed or damaged air manifold		All OK Go to Step 4	Restore distribution manifold operation PROCEDURE OP. 5020A24. If required, replace flaps
4	CHECK CORRECT OPERATION	Check the fault is no longer present	All OK End of test	Problems found	Intervention
4	Fault persists	Check the fault is no longer present	All OK End of test	Seek fault starting from another symptom

Parts & tools for this job For 1998 Fiat Seicento

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