We have a Kitchenaid electric single wall oven, Model KEBC107 and it has been having intermittent problems. A short time after when shut the oven off, the entire display unit will blink and beep once, then the lock door light will go on and then off after a few seconds and then we get the pf code. Hitting the Cancel button clears it up and it is ready to go again. This same sequence happened twice yesterday while the oven was in use.

Any ideas if this is the control board or another issue?