we have had our big e for a couple of months now. have been more than pleased with it, until this morning. we have 2 stoves, the big e that runs on manual and another stove on a "t-stat". we only run the big e at night. turned it off this morning and the convection blower never shut off. i turned the power off to it for a while and turned the power back on, the convection blower started as soon as the power was back on. any ideas?