2582465 - L55 HEATER NOT HEATING

The fan works properly and sends air to the passenger compartment in accordance with the set flows, but this air does not ensure the required heating.
Results of the tests
1HEATER PIPES CHECKAll OKProblems metOperation
Check the efficiency and seal of the supply and return pipes to/from the heater.Continue to Step 2Pipes badly connectedRestore the correct connections
Pipes dirty, obstructed or brokenClean or replace the pipes
2MIXTURE CONTROLS CHECKAll OKProblems metOperation
Check the mixer control cable is correctly fitted. Also make sure that the mixture flap moves freely.Continue to Step 3Connection defectiveRestore the connection or replace the cable Op.   5020B42 
Flap stuck or defectiveRestore the operation of the flap or replace it Op.   5020A24 
3HEATER RADIATOR CHECKAll OKProblems metOperation
Check the seal of the heater radiator Also make sure that the radiator is not obstruced.Continue to Step 4Pipes badly connectedRestore the correct connection
Radiator dirty or obstructedClean the radiator or replace it Op.   5020A50 
4CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentFault persistsSearch for the fault starting from another symptom'