help with blower cutting out

[bedrock1]

hi I have a drolet I put in 3 months ago I have burn 6 cord of wood it that time and my house is cold the blower wont stay on only if u have the damper open. im not happy with it at all. I called sbi they are going to send me a new thermodisc but it funny why they change the location to the thermodisc from the back to the top.