Heater Valve Cable Adjustment

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

Fig 1: Disconnecting Heater Valve Cable From Heater Valve Arm
Courtesy of AMERICAN HONDA MOTOR CO., INC.
From under the dash, disconnect the heater valve cable housing from the cable clamp (A), and disconnect the heater valve cable (B) from the air mix control linkage (C).

Fig 2: Disconnecting Heater Valve Cable Housing From Cable Clamp
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Set the temperature control button to Max Cool (Lo) with the ignition switch to ON (II).
Attach the heater valve cable (B) to the air mix control linkage (C) as shown in step 2. Hold the end of the heater valve cable housing against the stop (D), then snap the heater valve cable housing into the cable clamp (A).
NOTE: Make sure the ring-end of the cable is pushed all the way to the base of the pin on the air mix control linkage.
From under the hood, turn the heater valve arm (A) to the fully closed position as shown, and hold it. Attach the heater valve cable (B) to the heater valve arm, and gently pull on the heater valve cable housing to take up any slack, then install the heater valve cable housing into the cable clamp (C).

Fig 3: Identifying Heater Valve Arm
Courtesy of AMERICAN HONDA MOTOR CO., INC.