I hate to break it to you but the control unit will have to be replaced since the knobs are acting up
I know what you mean on the weatherN9LO said:I'm in Wisconsin and at -15F mine act up a little until warm. I do not know if they are mechanical or optical encoders but there could be a little frost in there. Dragging in snow on our boots and then drying the floor with the heater puts a lot of moisture everywhere. I have to park outside, love my Viper remote starter, and my CD changer skips until it is warmed up. Here in Wisconsin we have 2 seasons, Winter and the 4th of July also know as Shoveling and Swatting. You can get on on Amazon for $360. July is not too far off