When you pull the thermostat off the baseplate is the ?c? terminal hooked up? I?d make sure all the wires I highlighted are connected, clean your ground terminal the yellow terminal should go to the c on your thermostat Click image for larger version.  Name: 3919328F-7626-4EC3-BFE6-E0FA97B9C3CF.jpg  Views: 89  Size: 256.6 KB  ID: 92582Click image for larger version.  Name: 3919328F-7626-4EC3-BFE6-E0FA97B9C3CF.jpg  Views: 89  Size: 256.6 KB  ID: 92582