Error code PE, I think it is the Water Level Sensor? if so, can we buy the part & do it ourself?
The PE error code represents that the pressure switch has either a bad connection or has failed. Check the connections at the pressure switch and at the blue 4 pin connector at the main board. Test the pressure switch in test mode. If the initial reading is less than 60 or more than 104 the switch has failed and must be replaced.