Ive got a 91 mercury grand marquis and the eatc is not working properly.I have ac till car warms up then have neither heat or ac after that.I just changed blend door actuator and was no help as it is not getting signal from dash controls.Floor mode is not working either and cant find any vacuum leaks.This car has climate control.I am going to remove controls and clean and inspect them as best i can and see what happens.I also just converted it to 134 and im not givin up till i get it workin.I dont want to keep changing out parts and gettin nowhere.The blend door switch was not much fun.Does anyone know if someone is repairing them or where i can get an nos control.Car is definately worth the expense and aggravation.looking on line has been unproductive and any leads would be appreciated.I am going to call old air products in texas tomorrow and start there.