I have a kenmore gas oven that is giving me fits. I have replaced the touchpad and the oven control board, tested the power supply and grounding. Tested the wall outlet to make sure it is properly wired and grounded and supplied. It tested OK. When I plug the oven in, it gives me a PF code on the display. I can not reset the oven control with the touch screen. The controller doesn't respond to the touch screen. I hold down the start key to reset, but it doesn'tThe PF code persists. I have checked the connections very carefully. the burners work and ignite properly. Gas line is connected and supplied properly. The display clock tells time (but can not be set). There is no lock symbol showing on the display. I also tested the oven temperature sensor's resistance and it reads ~1080 ohms. Also, I plugged in and waited 5 minutes before trying to reset.

Please help!

Thanks.