Last night I had turned on the stove and it was running for about an hour or so and I went to sleep upstairs. This morning it was very cold in the house and noticed the stove had shut down, even though the hopper had pellets. Right now I decided to turn it on again and I can see that pellets are NOT coming down to the bottom auger.....nothing.. Bottom auger is turning and I think the top one as well because I can hear the squealing noise I'm used to. Help please..!!