3233111 - L15 CLIMATE CONTROL NOT HEATING

The control unit operates the fan which sends air into the passenger compartment normally with the pre-set flows, but this air does not guarantee the required heating.
Results of the tests
1CHECK WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket

  • Check that there are no faults in the climate control control unit
 Continue to Step 2 An error is detected in the control unitContinue according to the instructions for the diagnostic equipment
Lack of dialogue with the control unit

Restore:

  • the connection between the climate control control unit and the diagnostic connector
  • the climate control control unit supply.
( See   E6020  AIR CONDITIONING ).
2MIXTURE MOTOR CHECKAll OKProblems metOperation
Using the diagnostic equipment (Examiner or other instruments), carry out the active diagnosis for the mixture motor Continue to Step 3 Mixture motor connection faulty ( See   E6020  AIR CONDITIONING ).
Mixture motor faulty Replace the mixture motor Op.   5040D77 
Mixture motor flap faulty Replace the mixture motor flap Op.   5040C24 
3HEATER PIPE CHECKAll OKProblems metOperation
Check the efficiency and the seal of the supply and return pipes from the heater; with the engine hot, the pipes should be hot Continue to Step 4 Pipes not connectedRestore the correct connection
Pipes dirty or obstructed Clean the pipes or replace them Op. 5010A10
4HEATER RADIATOR CHECKAll OKProblems metOperation
Check the seal of the heater radiator Continue to Step 5 Pipes not connectedRestore the correct connection
Radiator dirty or obstructed Clean the radiator or replace it Op.   5040C50 
6CHECK CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisFault persistsSearch for the fault starting from another symptom'