Ok so I have a Mt vernon Pre AE and Its worked ok for the past year and a half. This winter we decided to just use it to heat our turn of the century farm home. Well we have the had the pipes freeze now today for the second time and we came home last night and there is this real bad grinding noise from the blower on the stove. Its the one that starts with the stove. Its just so bad sounding. i want to shut the thing down but then i will have no heat. WHAT DO I DO.