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I have an aircon leak on 407 1.6HDI sport. Kwikfit could not say where only it would not hold vacuum. There is a pipe in left hand side front of engine bay which looks like it has residue on it. Are there any weak points or common faults for this car and it's aircon?
 

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The only reliable way to find an aircon leak is to inject the special dye into the system and then look for the leak with a UV lamp.
 

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The only reliable way to find an aircon leak is to inject the special dye into the system and then look for the leak with a UV lamp.
Thanks for the reply, this is the plan for this week. Kwikfit said when we took it in they could find the leak, when we collected the car they could not. I have since found out they do not do the dye test.
 
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