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| Radiator and condenser must be clean (clean them if necessary). |
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| The compressor and alternator Poly-V belt is in good condition and properly tensed. |
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| All air ducts, covers and seals OK and properly fitted |
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| The flaps reach their end positions. |
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| Engine at operating temperature |
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| The evaporator and heating do not draw any uncooled air at highest fresh air blower speed. |
| While the engine is running and the air-conditioner is set to its maximum cooling power, observe the following points: |
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| The fresh air blower is working |
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| The radiator fan is ready for operation and starts. |
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| The air recirculation/fresh air flap is in the position „Air recirculation“. |
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| Ambient temperature of over 15° 0 C. |
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| The temperature switch for evaporator -E33- is correctly fitted and its switching temperatures are correct. |
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