I have an englander insert pellet stove, about 9 years old. just recently as I start a fire, it wants to shut off before the blower comes on, if i hit the arrow buttons on the side control panel, it starts back up. sometimes it will do this several times before the blower comes on, sometimes, not once. once the blower comes on every thing is fine. was wondering if any one had any ideas what may be wrong? thanks and have a great day.