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| Atmospheric temperature of more than 15°C. |
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| Radiator and condenser clean, if necessary, clean them. |
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| The Poly-V belt for the operation of the compressor is in good condition, tense and pulley action to the compressor must be OK. |
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| All air ducts, covers and seals OK and properly fitted |
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| The air flow through the dust and pollen filter is not obstructed by dirt. |
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| The air intake (in fresh air and air recirculation position) should be clear of any obstruction or components. |
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| The vehicle should not be in direct sunlight. |
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| The engine must be warm. |
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| The fault memory of the Climatronic control unit -J255-/Air conditioning control unit -J301- has been consulted and cleared, the basic adjustment has been completed and the coding of the Climatronic control unit -J255-/Air conditioning control unit -J301- → Vehicle diagnosis, testing and information system VAS 5051 has been checked. |
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| Open all dash panel vents |
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| Adjust operating mode “Auto” on the control and indication panel, Climatronic control unit -J255-. |
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| Choose temperature preselection “LO” (for driver and passenger side) on the control and indication panel,Climatronic control unit -J255-. |
| Functions with the engine is running: |
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| The fresh air fan -V2-functions at full speed. |
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| The air conditioning goes to air recirculation (about 1 minute after starting the vehicle), the fresh air intake closes and air recirculation opens (air is taken in by the fresh air fan -V2- of the passenger compartment, under the dashboard/glove compartment). |
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| The radiator fans -V7- operate (activation and speed depend on the air conditioning circuit pressure and engine temperature). |
Note |
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