Good morning I just bought a used pellet stove insert a mount Vernon got it all hooked up programmed thermostat kicked it on and ran perfect all night got up this morning and it was out of pellets filled hopper with pellets put a cup of pellets in burn pot hit restart on thermostat igniter kicks on starts to burn pellets then shuts down and goes into clean mode tried restarting 3 times doing the same thing I notice no pellets coming out of feeder any idea what could be wrong ?