stated Oven unit displaying F1 error, went into test mode, run blower motor, does not run, remove covers, spin motor by hand, is rough, motor now does turn on through test mode but is very loud. blower motor going out. will order and return. 5/29/19 removed covers from unit, removed old blower motor from unit. install new. reassemble covers onto unit. plug in, turn on, allow to heat, blower now running quietly. check amp draw on heaters and mag circuits. OK on heating circuits. test make product. OK for use.