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Home >> Porsche >> 2021 >> Taycan 4S >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> 85 Ventilation -- Y1A - TAYCAN (Y1A) >> WM, 851519 Removing And Installing Heating/Fresh Air Unit >> Removing Heating/Fresh Air Unit

Removing Heating/Fresh Air Unit

NOTE: NOTIFICATION 
Opened refrigerant system for repairs. 
  • Risk of moisture getting into the refrigerant system. 
  • Risk of contaminating the refrigerant circuit. 
  • Risk of saturation and irreparable damage to desiccator. 
  • Irreparable damage to the desiccator can damage the compressor and evaporator. 

    → After opening the refrigerant circuit, close off the refrigerant lines/connections immediately using the relevant stoppers. To avoid contaminating the refrigerant circuit, the stoppers for the different refrigerants must be stored and used separately.

    → The desiccator must be replaced if the air humidity is high and if the refrigerant circuit is left open for a long time.

Information 

The footwell and centre console area must be lined with highly absorbent material.

  1. Disconnect line connection for refrigerant line between compressor and evaporator -1-  .
    1. 1.1 Release and disconnect electric plug connection -2-  .
    2. 1.2 Unclip clip -3-  and move electric line aside.
    3. 1.3 Unscrew screw -4-  and disconnect line connection for refrigerant line between compressor and evaporator -1-  .
    4. 1.4 Close off connection openings using suitable stoppers.
    5. 1.5 Move refrigerant line between compressor and evaporator -5-  aside.
    G15565449Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Refrigerant line between compressor and evaporator

  2. Disconnect refrigerant line -1-  .
    1. 2.1 Unscrew screw -2-  and pull off refrigerant line -1-  .
    2. 2.2 Close off connection openings using suitable stoppers.
    3. 2.3 Move refrigerant line -1-  aside.
    G15565450Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Refrigerant line

  3. Disconnect heat exchanger supply and return hose -1 and 2-  .
    1. 3.1 Loosen spring band clamps -3-  using > VAS 6891 - Spring Band Clamp Pliers  .
    2. 3.2 Pull off heat exchanger supply and return hose -1 and 2-  .
    3. 3.3 Close off connection openings using suitable stoppers.
    4. 3.4 Lay heat exchanger supply and return hose -1 and 2-  aside.
    G15565451Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Heat exchanger supply and return hose

  4. Press rubber sleeves -1-  out towards the passenger compartment from the firewall.
    G15565452Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Rubber sleeves

  5. Pull water drain hose -1-  out of the connection piece for the heating/fresh air unit -2-  and set it aside.
    G15565453Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Water drain hose for heating/fresh air unit

    Information 

    You will need a second mechanic to help you with this step.

  6. Remove heating/fresh-air unit -1-  .
    1. 6.1 Grasp the heating/fresh air unit -1-  at the left and right, pull it out of the brackets -2-  towards the passenger compartment and guide it out using rubber sleeves -3-  .
G15565454Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Heating/fresh-air unit

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