Jeep 55037533AB Air Conditioner And Heater Control

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Disconnect the negative cable from the battery. For 2007 and earlier models, remove the center trim bezel and disconnect the electrical connectors and vacuum plug from the A/C switch. Detach the A/C switch by removing the four mounting screws. To install the A/C switch, reverse the removal procedure. For 2008 and later models, remove the center trim bezel and disconnect the electrical connectors to the A/C switch. Remove the A/C switch assembly mounting screws and separate the A/C switch assembly from the trim bezel. Installation is the reverse of removal. Note that when installing a new A/C switch or reinstalling the original one, the A/C switch assembly will automatically perform the Actuator Calibration function when the ignition key is first turned on. If the A/C switch assembly is from another vehicle, the Actuator Calibration must be done following the diagnostic guidelines using a scan tool and software. For A/C switch vacuum tests on 2007 and earlier models, remove the check valve located behind the glove box and test it with a handheld vacuum pump. If the vacuum does not flow through or hold, replace the check valve. Reconnect the check valve in the proper direction and plug the hose back onto the intake manifold. With the A/C switch pulled out and the vacuum harness disconnected, apply vacuum to each of the ports on the connector. If any of the circuits don't hold vacuum, trace the lines to their destination to isolate the source of the leak and repair it. Note that the vacuum lines are colored differently according to their destination, making it easier to trace them during troubleshooting.