Hello, I recently moved into a home with an older pool and I'm trying to figure out the heater. It's a minimax 250 tsi nt. When I turn on the heater I get green leds for power, pressure sw and thermostat. Heating light only turns green for a few seconds, there's a huge flame that scares the Crud outta me then goes away as well (I have the doors open to watch) it tries to stay lit 3 times then gives error code E05 and the red service led. I checked the lights behind the control board and the PV led 13 is off. I have already replaced the thermistor, both hi limit switches, the igniter and flame sensor. Any advice other than a brand new heater??TIA