Q7 Quattro V6-3.6L (BHK) (2007)
Evaporator Drain Tube: Service and Repair
Front Condensation Water Drain Hose, Checking, Removing and Installing
Front Condensation Water Drain Hose, Checking, Removing And Installing
NOTE:
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Only one condensation water drain hose is installed on this vehicle (at right on heating A/C unit in passenger compartment).
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There is a flap - D - on the outlet opening on the condensation water drain hose - A -, check this flap, it must not be jammed and must close.
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Condensation water drain - A - ends in engine compartment at lower right beneath bulkhead. Depending on version of vehicle (engine and
transmission configuration), condensation water drain can be checked via the engine compartment (from above or below).
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For clear illustration, condensation water drain - A - is depicted with assemblies removed.
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Flap - B - on condensation water drain must not be obstructed by wax or underbody sealer, it must close properly.
Checking
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Disconnect condensation water drain hose - A - and check the following:
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Check condensation water drain of heating A/C unit - B - for soiling (e.g. using a piece of wire) and clean it if necessary.
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Check clearance of the insulation mat (in engine compartment, not present in all vehicles) via opening - B - in floor plate - C - or out from
engine compartment, it must be large enough so that it does not contact the flap - D -, permitting condensation water to drain out from
condensation water drain opening.
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Check installation position of floor mat - E -, it must not constrict (compress) cross section of condensation water drain hose - A -.
NOTE:
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Flap - D - (valve) must not be obstructed by wax or underbody sealer, it must close properly.
