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post #29 of (permalink) Old 27th February 2007
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I have this problem on my Renault Megane 1999 Alize. The knocking noise happens when I switch from internal to external circulation. When it happens I get about 25 loud knocks, that drives me and my family mad (suicidal they say). My car has air conditioning and an inspection of the air motor unit from under the bonnet suggests that it is difficult to fix by yourself. Not only does it have air conditioning piping emerging from the box but the box itself appears to be placed deep down behind the engine and bodywork. I'm not sure that it is possible to get to from inside the car as there appears to be metal bodywork in the way. Does anyone know whether the air conditioning unit fluid has to be drained and replaced?
Currently in tennisman's garage:
1999 Renault Megane Alize 1.4
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