3308735 - U11 UNPLEASANT HEATER ODOURS

The heater is working properly, but there is an unpleasant smell in the passenger compartment
Results of the tests
0PRELIMINARY CHECKSAll OKProblems metOperation
First check that the unpleasant smells are not coming from the outside: they can be eliminated straight away by switching on the recirculation function Continue to Step 1 Recirculation not working See table   L56 
1AIR SUPPLY DUCTS CHECKAll OKProblems metOperation
Check the air supply ducts: they should not be obstructed with dirt or foul smelling substances Continue to Step 2 Vents malfunctionWash the ducts (after removing the electric fan)Restore the ducts (see Assembly 5010B)
2CHECKING HEATER RADIATORAll OKProblems metOperation
Check the heater radiator: the external fins should not be obstructed with dirt or other substances Continue to Step 3 Radiator dirty or obstructed Clean the radiator or replace it Op.   5040C50 
3HECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisFault persistsSearch for the fault starting from another symptom'