While running through the motronic diagnostics link everyone here knows so well I found myself noticing the heater valve oscillating at a consistent rate. I decided to play with the hvac dial to satisfy my curiosity. I found that it switched power more or less quickly or not at all based on where the dial was. With the multimeter I read 0 - .55 - 0v repeatedly as it switched.

Is this normal? Ive never noticed this before but that doesnt mean much.