Ask the expert: 'Why won't the aircon in my Audi work properly?' - The Telegraph

Our reader wants to know what the problem is with his car's cooling system. Our expert offers advice

The econ light on the air-conditioning switch of my 2007 Audi A4 comes on and stays on whichever function I select and the system fails to drop the temperature to the coolest setting. What are the li… [+2188 chars]

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