We just got a Englander 25 ep. Manufactured 7/14 serial number 008408. It will start up fine. After anywhere from 20min to 4 hrs it will throw a e 3 or a e5 code. Then randomly shut on and off . The control board will flicker . If you unplug it and then turn it immediately back on it runs fine again for a while. Sometimes when it's not even on the blower will kick on by itself. I checked the 3 codes on bottom and they are all set to 1 but it won't let me change ant setting. I tried the hard reset by hitting all 3 at the same time and it won't do anything like throw a f5 code. When it randomly shuts off it doesn't go into shut down mode. Could this mean the control board is bad or the thermal sensor. Please help!!