I h.ave Mt Vernon Ae that wont ignite.It had an error message of a missed ignition .I retryed it and its feeding pellets,the combustion fan comes on then it will go int auto clean mode and start the cycle again with no error message.I tryed unplugging it but it does the same thing.I was thinking the ignitor might be bad but i noticed that when i turned the stove to off on the thermostat it was displaying start up and the combustion fan was still on and it fed pellets to the firepot.Now im thinking the circit board.has anyone else had a problem like this?