Climate control too cold
- Make
- Alfa Romeo
- Model
- 147 Factory Service Manual
- Year
- 2000–2004
- Section
- Climate control › Climate control too cold
Fault diagnosisClimate control too cold
CLIMATE CONTROL TOO COLD
The control button operates the passenger compartment air fan normally, but the temperature of the air is not correct.
| Results of the tests | ||||
| 1 | AIR TEMPERATURE CHECK | All OK | Problems met | Operation |
|---|---|---|---|---|
| Check the temperature of the air at the vents. | Continue to Step 8 | Ambient temperature at the vents | Continue to Step 2 | |
| Temperature at the vents higher than desired | Continue to Step 3 | |||
| 2 | CHECKING SYSTEM PRESSURE | All OK | Problems met | Operation |
| Connect the climate control system to the repressurizing equipment and check the system pressure. | Continue to Step 8 | High and low pressure values below correct figures. | Repressurize the system Op. 5040A10 | |
| High and low pressure values above correct figures. | Continue to Step 3 | |||
| Low pressure value correct, but high pressure value above correct figure (rapid compressor cycle as engine rpm increases) | Continue to Step 4 | |||
| Low pressure value high and high pressure value below correct figure | Replace the compressor Op. 5040A20 | |||
| High and low pressure vaules do not alter when the air conditioning is activated. | Replace the compressor Op. 5040A20 | |||
| 3 | CONDENSER FAN CHECK | All OK | Problems met | Operation |
| Check that the fan cools the condenser correctly. | Continue to Step 4 | Electric fan defective | Replace the fan Op. 5040C30 | |
| 4 | CIRCUIT LOADING CHECK | All OK | Problems met | Operation |
| Check that the system loading is not excessive. | Continue to Step 5 | System loading excessive. | Restore the correct loading Op. 5040A10 | |
| 5 | COOLANT CIRCUIT OBSTRUCTION CHECK | All OK | Problems met | Operation |
| Check that the pipes and the filter are not obstructed. | Continue to Step 6 | Pipe from compressor to condenser obstructed | Replace the pipe Op. 5040A50 | |
| Pipe from condenser to filter obstructed | Replace the pipe Op. 5040A52 | |||
| Pipe from filter to expansion valve obstructed | Replace the pipe Op. 5040A64 | |||
| Filter obstructed | Replace the pipe Op. 5040A44 | |||
| 6 | CONDENSER CHECK | All OK | Problems met | Operation |
| Check that the condenser is not blocked. | Continue to Step 7 | Condenser blocked | Replace the condenser Op. 5040A40 | |
| 7 | EXPANSION VALVE CHECK | All OK | Problems met | Operation |
| Check the operation of the expansion valve. | Continue to Step 8 | Expansion valve defective | Replace the expansion valve Op. 5040B30 | |
| 8 | CHECK ON CORRECT OPERATION | All OK | Problems met | Operation |
| Check that the fault is no longer present | End of diagnosis | Fault persists | ||
Parts & tools for this job For 2000 Alfa Romeo 147
- TOOLA/C manifold gauge setSearch: AC manifold gauge set
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- PARTCabin filterSearch: Alfa Romeo 147 2000 cabin filter
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