My pellet stove won't start up. I've put some in the firepot and it starts up but no pellets feed in to keep it going. Can anyone tell me what the snap disks look like? The manual says it could be a snap disk 2 problem. The shop told me I'd see that on the left side of the stove with an orange wire but there aren't any there. Do I have to remove anything? Can someone show a picture of a snap disk? Any other help would be greatly appreciated. Thanks.