Hey everybody just looking for help with my castle serenity stove. My ash bin was emptied and the door was not closed correctly when the stove was started back up. Stove will ignite fine but when it switches to heating mode the auger stops feeding. The vacuum switch is not on. A service tech came over while I was at work and there was a lack of communication and understanding between him and my wife so all he left me with is that he thinks it’s the snap disc. Where and how do I repair? Thank you all.