Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Heating And A/C Unit, CLIMATRONIC: Notes
Special tools and workshop equipment required
- Hose Clamps Up To 40 mm 3093
- For example A/C Service Station VAS 6007A or ROB134APF
- Drip Tray For VAS 6100 VAS 6208
Removing
To improve accessibility, additional components e.g. engine cover must be removed (depending on engine version). Refer to [For transmission(s) 0A4, 09G] [For engine(s) CBTA, CBUA] Removal and Installation or refer to [For transmission(s) 02E, 02Q] [For engine(s) CJAA] Removal and Installation .
-- Extract refrigerant e.g. using ROB134APF, only then open the refrigerant circuit. See notes, refer to SERVICING VEHICLES EQUIPPED WITH A/C .
-- Remove instrument panel. Refer to Removal and Installation .
-- Remove the bulkhead inside the plenum chamber. Refer to Description and Operation .
-- Remove the rear channels from the right and left footwells. Refer to REAR FOOTWELL CHANNEL .
-- Place the VAS 6208 under the engine.
-- Mark the coolant hoses -1-.
Contact with hot engine coolant can cause severe scalding.
Coolant temperature can be above 100 °C with a warm engine. The cooling system is under pressure.
If necessary, reduce pressure and temperature before repairs.
-- Clamp off the coolant hoses -1- using the VAS 3093 and remove the coolant hoses from the heat exchanger.
-- Connect a section of hose -A- to the upper connection.
-- Hold a container -B- under the lower connection -C-.
-- Using a compressed air gun, carefully blow residual coolant out of heater core at heater core connection.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.