I’ve had a Mt Vernon E2 freestanding stove for about 5yrs now. Recently on startup the combustion blower switches on full speed and then never ramps down and stove doesn’t start. If I unplug stove and plug back in It will usually start. sometimes it will ramp down after 15-20mins and then start. I have bypassed the vacuum switch and both snap discs with no change. Sometimes stove works fine and today it will light and run fine for a few minutes then just stop feeding and ramp the combustion blower back up to high until stove goes out. I get no red warning lights (faults), I’m thinking maybe a temp sensor or bad blower RPM sensor?