Acura TSX / Honda Accord CL. Manual - part 677

Fig. 119: Pulling Out The Evaporator Core And The Plate

6. Install the core in the reverse order of removal, and note these items. 

z

If you're installing a new evaporator core, add refrigerant oil (KEIHIN SP-10) (see A/C 
Refrigerant Oil Replacement ).  

z

Replace the O-rings with new ones at each fitting, and apply a thin coat of refrigerant oil before 
installing them. Be sure to use the correct O-rings for HFC-134a (R-134a) to avoid leakage.  

z

Immediately after using the oil, reinstall the cap on the container, and seal it to avoid moisture 
absorption.  

z

Do not spill the refrigerant oil on the vehicle; it may damage the paint; if the refrigerant oil contacts 
the paint, wash it off immediately.  

z

Make sure that there is no air leakage.  

z

Charge the system (see SYSTEM CHARGING ).  

HEATER UNIT/CORE REPLACEMENT 

SRS components are located in this area. Review the SRS component locations, and the precautions and 
procedures in the SRS section before performing repairs or service. See AIR BAG RESTRAINT SYSTEMS . 

1. Make sure you have the anti-theft codes for the radio and the navigation system, then write down the 

frequencies for the radio's preset buttons.  

2. Disconnect the negative cable from the battery.  

3. Disconnect the suction and receiver lines from the evaporator core (see EVAPORATOR CORE 

REPLACEMENT )  

4. From under the hood, open the cable clamp (A), then disconnect the heater valve cable (B) from the 

heater valve arm (C). Turn the heater valve arm to the fully opened position as shown. 

 

2004 Acura TSX 

2004 AUTOMATIC A/C SYSTEMS Climate Control System - TSX

  

 

Fig. 120: Disconnecting The Heater Valve Cable 

5. When the engine is cool, drain the engine coolant from the radiator (see COOLANT 

REPLACEMENT ).  

6. Slide the hose clamps (A) back. Remove the bolt and water valve bracket, then disconnect the inlet heater 

hose (B) and the outlet heater hose (C) from the heater unit. Engine coolant will run out when the hoses 
are disconnected; drain it into a clean drip pan. Be sure not to let coolant spill on the electrical parts or the 
painted surfaces. If any coolant spills, rinse it off immediately. 

 

2004 Acura TSX 

2004 AUTOMATIC A/C SYSTEMS Climate Control System - TSX

  

 

Fig. 121: Disconnecting The Inlet Heater Hose & The Outlet Heater Hose From The Heater Unit 

7. Remove the mounting nut from the heater unit. Take care not to damage or bend the fuel lines and the 

brake lines, etc. 

 

2004 Acura TSX 

2004 AUTOMATIC A/C SYSTEMS Climate Control System - TSX

  

 

Fig. 122: Removing The Mounting Nut From The Heater Unit 

8. Remove the dashboard (see DASHBOARD ).  

9. Remove the footrest and the footrest bracket.  

10. Disconnect the connectors (A) from the driver's air mix control motor, the evaporator temperature sensor, 

the power transistor, the mode control motor, passenger's air mix control motor, and the recirculation 
control motor, then remove the wire harness clips (B), the connector clips (C) and the wire harness (D). 
Remove the heater ducts (E). then remove the mounting nuts and the blower-heater unit (F). 

 

2004 Acura TSX 

2004 AUTOMATIC A/C SYSTEMS Climate Control System - TSX