Heater not heating
- Make
- Fiat
- Model
- Multipla Factory Service Manual
- Year
- 1998–2010
- Section
- Climate control › Heater not heating
Fault diagnosisHeater not heating
HEATER NOT HEATING
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.
| 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' | |
Parts & tools for this job For 1998 Fiat Multipla
- TOOLA/C manifold gauge setSearch: AC manifold gauge set
- TOOLUV leak detection kitSearch: AC UV leak detection kit
- PARTCabin filterSearch: Fiat Multipla 1998 cabin filter
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