Hello all. Just purchased my first pellet stove ( used). Whitfield advantage ll. It worked great for an hour and then the stove shut down as if the power was cut. If I push the red start button everything comes back on. 20 minutes later its down again and so on and so on. The blower motor seems too hot. Not the housing, just the motor. The exaust motor runs cooler than the blower motor. Any ideas? Thanks much