Page 1 of 16 2006 Cadillac CTS : Heating, Ventilation, & Air Conditioning > Repair Instructions > Air Conditioning And Heater Module Assembly Removal And Installation Air Conditioning And Heater Module Assembly Removal And Installation AIR CONDITIONING AND HEATER MODULE ASSEMBLY REMOVAL AND INSTALLATION Tools Required J 39400-A (Image 1) Halogen Leak Detector J 38185 (Image 2) Hose Clamp Pliers J 45689 (Image 3) A/C Quick Joint Tool Removal Procedure 1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging. 2. Remove the battery. Refer to Battery Replacement (Refer To List 1) in Engine Electrical. 3. Drain the coolant. Refer to Cooling System Draining and Filling (Refer To List 2) in Engine Cooling. 4. Using thej 38185 (Image 2) disconnect the heater inlet hose (1).
Page 2 of 16 5. Using the J 38185 (Image 2) disconnect the heater outlet hose (1). 6. Disconnect both A/C lines at the cowl. NOTE Important: The body of the tool should be parallel to the A/C line.
Page 3 of 16 7. Using the J 45689 (Image 3) (1) insert the probe end into the two small openings of the plastic quick joint. 8. Remove both quick joint clamps. 9. Disconnect both A/C lines. 10. Remove the IP Carrier. Refer to Instrument Panel Carrier Replacement (Refer To List 3) in Instrument Panel, Gages, and Console.
Page 4 of 16 11. Remove the air inlet assembly. 12. Disconnect the HVAC module electrical connector. 13. Disconnect the HVAC module drain tube (2) from the floor. 14. Press the tab and release the left rear duct from the HVAC module.
Page 5 of 16 15. Disconnect the left rear heater duct from the HVAC module. 16. Press the tab and release the right rear duct from the HVAC module. 17. Disconnect the right rear heater ducts from the HVAC module.
Page 6 of 16 18. Remove the lower left HVAC module mounting nut (1). 19. Remove the upper left HVAC module mounting nut (1). 20. Remove the HVAC module from the vehicle.
Page 7 of 16 21. Remove the foam from the A/C lines. 22. Remove the foam from around the heater pipes. Installation Procedure 1. Install the thick foam packing (1) on the heater core pipes. 2. Install the thin foam packing (2) on the heater core pipes.
Page 8 of 16 3. Install the thick foam packing (1) on the A/C lines. 4. Install the thin foam packing (2) on the A/C lines. 5. Install the HVAC module into the vehicle. NOTE Notice: Refer to Fastener Notice (Refer To List 4) in the Preface section. 6. Install the upper left HVAC module mounting nut (1). Tighten Tighten the nut to 9 N m (80 lb in).
Page 9 of 16 7. Install the lower left HVAC module mounting nut (1). Tighten Tighten the nut to 9 N m (80 lb in). 8. Connect the rear heater ducts to the HVAC module. 9. Connect the drain tube to the bottom of the HVAC module.
2006 Cadillac CTS - Heating, Ventilation, & Air Conditioning > Repair Instructions >... Page 10 of 16 10. Connect the drain tube (2) to the floor. 11. Connect the HVAC electrical connector. 12. Install the air inlet assembly. 13. Lubricate the O-rings of the A/C line with refrigerant oil before connecting the A/C lines. Refer to O-Ring Replacement. 14. Install the A/C line and A/C line quick connect line clamp (1) to the evaporator.
2006 Cadillac CTS - Heating, Ventilation, & Air Conditioning > Repair Instructions >... Page 11 of 16 NOTE Important: Press the A/C line quick connect line clamp together until you hear it engage. 15. Engage the clamp. 16. Install the A/C line and A/C line quick connect line clamp (1) to the evaporator.
2006 Cadillac CTS - Heating, Ventilation, & Air Conditioning > Repair Instructions >... Page 12 of 16 NOTE Important: Press the A/C line quick connect line clamp together until you hear it engage. 17. Engage the clamp. 18. Connect the heater inlet hose (1) using J 38185 (Image 2).
2006 Cadillac CTS - Heating, Ventilation, & Air Conditioning > Repair Instructions >... Page 13 of 16 19. Connect the heater outlet hose (1) using J 38185 (Image 2). 20. Install the IP carrier. Refer to Instrument Panel Carrier Replacement (Refer To List 3) in Instrument Panel, Gages, and Console. 21. Install the battery. Refer to Battery Replacement (Refer To List 1) in Engine Electrical. 22. Fill the coolant. Refer to Cooling System Draining and Filling (Refer To List 2) in Engine Cooling. 23. Evacuate and recharge the AC system. Refer to Refrigerant Recovery and Recharging. 24. Leak test the fittings of the component using J 39400-A (Image 1). REFERED IMAGES LIST: REFER TO LIST:
2006 Cadillac CTS - Heating, Ventilation, & Air Conditioning > Repair Instructions >... Page 14 of 16 (Image 1) J 39400-A REFER TO LIST: (Image 2) J 38185 REFER TO LIST:
2006 Cadillac CTS - Heating, Ventilation, & Air Conditioning > Repair Instructions >... Page 15 of 16 (Image 3) J 45689 List 1 List 2 List 3 List 4 Engine / Engine Electrical / Repair Instructions / Battery Replacement (RHD) Engine / Engine Electrical / Repair Instructions / Battery Replacement (LHD) Engine / Engine Cooling / Repair Instructions / Cooling System Draining And Filling (LY7) Engine / Engine Cooling / Repair Instructions / Cooling System Draining And Filling (Ls6) Engine / Engine Cooling / Repair Instructions / Cooling System Draining And Filling (LP1, LY7 Static Fill) Engine / Engine Cooling / Repair Instructions / Cooling System Draining And Filling (LS2 Static Fill) Engine / Engine Cooling / Repair Instructions / Cooling System Draining And Filling (Ge 47716) Engine / Engine Cooling / Repair Instructions / Cooling System Draining And Filling (LA3, LY9) Body / Instrument Panel, Gages, And Console / Repair Instructions / Instrument Panel Carrier Replacement Body And Accessories / Instrument Panel, Gages, And Console / Repair Instructions / Instrument Panel Carrier Replacement Body And Accessories / Keyless Entry / Repair Instructions / Instrument Panel Carrier Replacement Preface / Cautions And Notices / Introduction / Fastener Notice
2006 Cadillac CTS - Heating, Ventilation, & Air Conditioning > Repair Instructions >... Page 16 of 16 Unsorted / Fastener Notice