2582513 - S51 CLIMATE CONTROL SYSTEM NOISY' / (IN PASSENGER COMPARTMENT)

The climate control is working properly, but there is excessive noise coming from the distributor duct assembly
Results of the tests
1CHECKING ELECTRIC FANAll OKProblems metOperation
Check climate control system fan

In particular, ascertain:

  • No foreign bodies inside 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 2Fan dirtyClean the fan casing and all the ducts
Electric motor noisy, fan unbalancedReplace the fan Op.   5040C30 
2ACTIVE DIAGNOSIS WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Using the diagnostic equipment (Examiner or other instruments), carry out (in climate control control unit mode) active diagnosis of the fan at the different speedsContinue to Step 3Electric fan operation irregularReplace the fan Op.   5040C30 
3CHECKING DISTRIBUTOR DUCTAll OKProblems metOperation
Check for the presence of foreign bodies and damaged parts inside the distributor duct assemblyContinue to Step 4Presence of foreign bodies or damaged parts inside the duct distributor assemblyOverhaul the duct distributor assembly Op.   5040C24 
4CHECKING THE AIR DUCTSAll OKProblems metOperation
Check that the air ducts inside the dashboard and the vents are intact and that there are no foreign bodies which could cause noiseContinue to Step 5Ducts obstructed or damagedRepair the ducts and vents
5CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentFault persistsSearch for the fault starting from another symptom'