| | Results of the tests |
| 1 | HEATER PIPE CHECK | All OK | Problems met | Operation |
|---|
| 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 2 | Pipes not connected | Restore the correct connection |
| Pipes dirty or obstructed | Clean the pipes or replace them (see assembly 5010A) |
| 2 | CHECK MIXER CONTROL | All OK | Problems met | Operation |
|---|
| Check
the mixer control cable is correctly fitted.Check that the mixer flap moves freely. | Continue to Step 3 | Connection defective | Adjust correction or change
the cable Op. 5020B42 |
| Flap blocked or defective | Restore the flap to working order or replace Op. 5020A24 |
| 3 | HEATER RADIATOR CHECK | All OK | Problems met | Operation |
|---|
| Check
the seal of the heater radiator | Continue to Step 4 | Pipes not connected | Restore the heater radiator
pipe connections |
| Radiator dirty or obstructed | Clean the radiator or replace it Op. 5020A50 |
| 4 | CHECKING CORRECT OPERATION | All OK | Problems met | Operation |
|---|
| Check
that the fault is no longer present | End of diagnosis | Fault persists | Search for the
fault starting from another symptom' |