Tesla Model S Owners & Service Manuals

Tesla Model S: Heater - PTC (Dual Motor) (RHD) (Remove and Replace)

Tesla Model S (2012-2025) Service Manual / Thermal Management / Heater - PTC (Dual Motor) (RHD) (Remove and Replace)

Warning: Only technicians who have been trained in High Voltage Awareness are permitted to perform this procedure. Proper personal protective equipment (PPE) and insulating HV gloves with a minimum rating of class 00 (500V) must be worn any time a high voltage cable is handled. Refer to Tech Note TN-15-92-003, "High Voltage Awareness Care Points" for additional safety information.

Warning: If the 12V power supply is disconnected, do not attempt to open any doors with door glass in closed position. Failure to follow this instruction could result in door glass shatter.

Note: Before disconnecting the 12V power supply, ensure that the driver's door window is fully open. Failure to follow this instruction could result in vehicle lockout.

Removal

  1. Open the glove box.
  2. Perform the vehicle electrical isolation procedure (refer to procedure).
  3. Remove the cowl screen panel (refer to procedure).
  4. Remove and discard the cable tie that secures the PTC heater harness to the bulkhead.

    Heater - PTC (Dual Motor) (RHD) (Remove and Replace)

  5. Release the PTC heater harness (#4 in the below image) from the top of the forward junction box (FJB).

    Heater - PTC (Dual Motor) (RHD) (Remove and Replace)

    1 HV Battery heater harness
    2 DC-DC converter harness
    3 Compressor harness
    4 PTC heater harness
  6. Push the connector, harness, and grommet through the bulkhead.
  7. Remove the glove box (refer to procedure).
  8. Remove the LH footwell cover (refer to procedure).
  9. If equipped, remove the passenger knee airbag (refer to procedure).
  10. If equipped, remove the bolts (x2) and screws (x3) that secure the passenger knee airbag bracket. Remove the airbag mounting bracket.
  11. Remove the screws (x2) that secure the RH HVAC duct.
  12. Remove the screws (x3) that secure the PTC heater to the HVAC casing (torque 1 Nm).

    Heater - PTC (Dual Motor) (RHD) (Remove and Replace)

  13. Release the PTC heater harness from the HVAC retaining clip.
  14. Disconnect the connector from the PTC heater.
  15. Carefully pull the PTC harness through the bulkhead.
  16. Carefully remove the PTC heater module from the HVAC casing.

Caution: Take care not to damage component(s).

Installation

Installation procedure is the reverse of removal, except for the following:

  • Clean the interior of HVAC casing prior to assembly.
  • Replace the cable tie that secures the PTC heater harness to the bulkhead.
  • Use Toolbox to update or redeploy the firmware:
    • If the vehicle is not running the latest firmware, run the "Vehicle Firmware Update" procedure.
    • If the vehicle is running the latest firmware, run the "Firmware Redeploy" procedure.

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