L55 Heater does not heat
- Make
- Alfa Romeo
- Model
- 156 Factory Service Manual
- Year
- 1997–2002
- Section
- Climate control › L55 Heater does not heat
‹ Prev L51 Heater does not work en diferentes velocidadesNext › L56 Heater recirculation not working
Fault diagnosisL55 Heater does not heat
L55 Heater does not heat
The fan works properly and sends air into the interior compartment in accordance with the set flows, but this air does not ensure the required heating.
| Step | Test procedure | Result | Action |
|---|---|---|---|
| 1 | HEATER PIPE CHECK Check the efficiency and the seal of the supply and return pipes from the heater; with the engine hot, the pipes should be hot | OK | |
| Pipes not connected |
End of diagnosis | ||
| Pipes dirty or obstructed |
End of diagnosis | ||
| 2 | CHECKING MIXER CONTROL CABLE Check the mixer control cable is correctly fitted. | OK | |
| Connection defective |
End of diagnosis | ||
| 3 | HEATER RADIATOR CHECK Check the seal of the heater radiator | OK | |
| Pipes not connected |
End of diagnosis | ||
| Radiator dirty or obstructed |
End of diagnosis | ||
| 4 | CHECK CORRECT OPERATION Check that the fault is no longer present | OK | End of diagnosis |
| Fault persists | Incorrect selection of diagnostic procedure |
‹ Prev L51 Heater does not work en diferentes velocidadesNext › L56 Heater recirculation not working
Parts & tools for this job For 1997 Alfa Romeo 156
- TOOLA/C manifold gauge setSearch: AC manifold gauge set
- TOOLUV leak detection kitSearch: AC UV leak detection kit
- PARTCabin filterSearch: Alfa Romeo 156 1997 cabin filter
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