You might trip some error code in the ACC if you remove the cabin temp sensor, or it might default to some reading that doesn't let the ACC work as you need it to. If it's the buzzing that bothers you, disable the motor or pull off the blades. The ACC will be slower to react but should generally work if you leave the cabin temp sensor in place. Of course in the Philippines you probably leave the ACC on MIN anyway.

Sixto
95 S420
87 300SDL