2888422 - L51 HEATER NOT WORKING / AT DIFFERENT SPEEDS'

The passenger compartment air fan comes on, but not at the different speed settings.
Results of the tests
1CLIMATE CONTROL FAN ELECTRICAL CIRCUIT CHECKAll OKProblems metOperation

Check, in order:

  • climate control fan adjustment resistance
  • climate control fan controls
  • connection between climate control fan and its controls, via the adjustment resistor
( See   E6010  HEATER ).
Continue to Step 2Connections not correctRestore the connections
Electric fan defectiveReplace the electric fan Op.   5020A30 
Fan regulator defectiveReplace fan resistor Op.   5020A44 
Fan controls defectiveReplace fan controls Op.   5020B10 
2CHECKING CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisFault persistsSearch for the fault starting from another symptom'