[Vwdiesel] More Dasher?

[William J Toensing]

Went out to start my Dasher today. Didn't want to start on the time the timer allowed for the glow plugs. Pushed the "starter"button to feed some 12V to the glow plugs & it started like a charm.
Tool my Dasher to my air-conditioning mechanic. The A/C is charged but the problem in in the control switch. It is not sending any signal  to the clutch to engage. How do I get to the switch & replace it. I did replace a faulty rheostat a year ago which controls the fan speed, which still works. I also suspect the evaporator valve may be bad. How do I get to it? Do I have to take the dash apart? I hope not.