My WH-6GEA Dometic water heater burner will light up on propane but will not stay lit. I have checked the conductivity and all seems good. Voltage reading have been good, also. I did replace a bad breaker. The burner runs for about 10 minutes then stops. Only using power from the batteries. Also, I have noticed there is some occassional stray voltage that I can feel when touch the water heater. Passport 229RK22 2023. Do you have some suggestions? Thanks.