Temperature Control Switch

flashsuperstar said

That sounds like what I will do, however doesn't the Defrost button work by providing warm air to the windshield as you currently have your switch setup right now?

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It does, however it doesn't have to be warm air, can still be controlled with the slider, and would just like to have the option of running the compressor in defrost mode. Modern cars all do as far as I know, and dehumidifying the air blowing on the windshield is helpful when you need the defrost on hot/humid days like in a rainstorm for example.

I definitely suggest adding a relay so all the power isn't run through the switch, modern switches aren't built to have full load run through them, and quite frankly it was never the best idea in my opinion, but it's what they all did back when these cars were built.