Lost all control of heat & ac on an 07 EB

[poppie]

What would cause the controls to stop working on a 2007 EB ,yesterday was a nice day and we had no need for the AC,just wanted to run the VENT setting and all we got was HEAT even setting the temp control down to 60 degrees,also lost all control over fan speed no matter how we set the speed control AND also I can't turn the system off also unless I turn the key off,had this Expy EB for 7 year's and never had this happen before,any idea's,thanks,poppie