Condensation Water Drain Hose
Condensation Water Drain Hose
• This vehicle is equipped with 2 condensate drains (left and right on the air conditioner or center tunnel).
• There is no valve or door present on the outlet opening - C - of the condensation water drain hose - B - ; the condensation water flows over the rubber seals.
• There are different versions of the condensation water hoses - B -. On version "1" (see illustration above), the condensation water drain - B - is inserted directly in the opening - D -. On version "2" the condensation water drain - B - is inserted into the bracket - A -. The bracket - A - is held in the opening - D - of the floor panel - C - with the tabs. After installing the bracket - A -, the condensation water drain - B - must be pushed into the floor panel - C - to prevent any condensation water coming out of the drain - B - into the passenger compartment. Seal the area between both parts with silicone adhesive D176 001 A3. Refer to the Parts Catalog.
For complaints of moisture in passenger compartment, check the following as well as condensation water drain:
- Plenum chamber water drain, refer to => [ Plenum Chamber Water Drain ] Plenum Chamber Water Drain.
- Check the cowl land the fresh air intake housing for proper installation and damage. Refer to => [ Fresh Air Intake ] Fresh Air Intake.
- Dust and pollen filter for soiling and correct installation. Refer to => [ Dust and Pollen Filter ] Service and Repair.
- Forced air extraction vents in luggage compartment, refer to => [ Passenger Compartment Forced Air Extraction ] Service and Repair.
- Back pressure door/fresh air door activation and function, refer to => [ Air Flow Door Motor (V71) ] Air Flow Door Motor (V71) and recirculation door => [ Recirculation Door Motor (V113) ] Recirculation Door Motor (V113) for example, via the "output diagnostic test mode" of the Guided Fault Finding using the Vehicle diagnostic tester in "Guided Fault Finding"
• If there are complaints regarding humidity in the passenger compartment which only appears when the A/C compressor is switched on and under certain climatic conditions, check the temperature of the air coming out of the vents from the evaporator as follows:
- Select "read measured values block" for Guided Fault Finding (using the measured value from the evaporator vent temperature sensor (G263) ). Refer to the Vehicle diagnostic tester in "Guided Fault Finding".
- Check the output temperature of air at evaporator under conditions reported by the customer or at the following setting on the Climatronic control module (J255) , "Auto" operating mode, A/C compressor switched on (control light in the A/C button lights up), temperature setting "Cold", middle fresh air blower speed at a voltage of approximately 7 V on the Fresh Air Blower (V2) , fresh air mode (indicator light "recirculation button" does not light up) and open instrument panel vents, the air vent temperature at the evaporator.
- The sensor measured value is too low (at an ambient temperature above 0 °C (32 °F), longer time if colder than 0 °C (32 °F)) or too high even though the A/C system is working correctly, above, for example, 10 °C (50 °F). Correct the cause of the difference and note the information for the cooling output test. Refer to => [ A/C Cooling Output, Checking ] A/C Cooling Output, Checking.
Condensation water hose, removing, checking
- Turn off the ignition.
- Remove the glove compartment (for the right condensation water drain).
- Remove storage compartment on driver's side (for the left condensation water drain).
- Fold back the carpet near the condensation water drain (left or right) so that the condensation water drain is visible.
- Check the condensation water drain hoses - B - that they are properly routed and for dirt. Correct, for example, if the hose is constricted.
- Cover the area under both openings - D - (for condensation water drain - C -) with absorbent paper (so that any water present does not get under the carpet).
- Remove both condensation water drain hoses - B -.
- Check both A/C condensation water drains - A - for soiling (for example, using a piece of wire).
- Check the gap between the insulation mat installed in the center tunnel - E - and the end of the condensation water hose - C - above the openings - F - in the floor panel - D - ; the gap must be large enough so that the condensation water can flow out of the hose - B -.
Installing
Installation is carried out in the reverse order while observing the following.
- Install both condensation water hoses - B - making sure they are not twisted or kinked (different styles for the left and right side). Refer to Electronic Parts Catalog (ETKA).
- Make sure the carpet does not push up against the condensation water drain hose - B - when installing.
- If a condensation water drain hose - B - fits too loose on the A/C condenser water drain - A - , secure it with a clamp, for example, so that it cannot slide off.