A3 Quattro L4-2.0L Turbo (CBFA) (2009)
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Check installation position of coolant hoses to heater cores (they must not contact components which grow hot) and position and state of heat
protection insulation applied to coolant hoses if necessary (not installed on all engine types).
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Bleed coolant circuit.
‹› When bleeding coolant circuit, take special care to ensure complete bleeding of heat exchangers. If there are still air bubbles in the heater core, it
may cause the customer to complain of insufficient heating performance in winter or different air temperature from vents at same setting in
regulated mode. Refer to=> [ Heating Performance of A/C System ] See: Description and Operation/Heating Performance of A/C System
‹› Depending on vehicle equipment and on engine, heat insulation has been applied to coolant hoses, these must not be damaged and must be
re-applied after installing.
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Check the cooling system for leaks. Pay close attention to the connections between the coolant pipes and the heat exchanger. => Engine
Mechanical 19 Description and Operation
Check the cooling system for leaks:
‹› Bleed cooling circuit.
‹› Carefully open coolant reservoir cap (observe safety cautions when opening the cap).
‹› Increase pressure in coolant circuit, for example, using a hand pump Cooling System Tester (V.A.G 1274/).
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Reinstall cover for connections on heater core, driver side storage compartment and the remaining components that were removed.