The display works and is not showing an error code upon startup. It won't start when I increase the heat setting on my MasterTemp or when I turn Manual Heat to on and try to increase the temperature manually on the heater itself. In fact, none of the buttons on the pad - including temperature down and heater on and off - appear to be working. I ran a diagnostic on my EasyTouch panel and got error code 4 - stuck switch. I'm hoping this means I just need to replace the membrane pad on the heater. It's only two years old and I already had to replace the control board. Any thoughts would be greatly appreciated. Thanks!