S50 Climate control system noisy' (in engine bay)

Make: Alfa Romeo
Model: 147 Factory Service Manual
Year: 2000–2002
Section: Noise/vibrations › S50 Climate control system noisy' (in engine bay)

Fault diagnosisS50 Climate control system noisy' (in engine bay)

The climate control works properly, but there is too much noise coming from the engine compartment

Step	Test procedure	Result	Action
0	PRELIMINARY CHECKS Disconnect the services belt and check whether the noise disappears. NOTE: Do not let the engine run for long with the belt disconnected Check whether the noise only occurs with the engine switched off	OK	Move onto step 2
		The noise disappears when the services belt is disconnected	See table S10 ENGINE WHISTLING / UNIT BELT NOISE End of diagnosis
		The noise only occurs with the engine switched off	Check that it is not coming from the electric fan End of diagnosis
		The noise does not disappear	Move onto step 1
1	PIPES AND COMPONENTS FIXING CHECK Check that the compressor and the system pipes and components are correctly fixed. In the following order: drier filter fixing pipes fixing (with bands and spacers) no interference between the pipes and other components in the engine compartment Compressor fixing to the engine	OK	Move onto step 2
		Components fixing not correct	Restore the correct tightening. If necessary, replace the bands or spacers End of diagnosis
		Interference in the engine compartment	Restore the correct pipe layout End of diagnosis
2	CORRECT OPERATION CHECK Check that the fault is no longer present	OK	Incorrect selection of diagnostic procedure
2		Fault persists	Incorrect selection of diagnostic procedure

Parts & tools for this job For 2000 Alfa Romeo 147

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