Hi I am working on a Quadrafire Classic Bay CB1200i. MFD is 2011 but the fire box was so rusty! Had to remove all the parts and wire wheel, clean with Acetone and paint with the VHT 2000 Deg paint. I also installed the updated thermocouple holder that holds the wire too, since the old one was in bad shape. So it starts and runs fine but the room blowe stops and starts. I tried 2 new Low Limit snap discs and the blower would not run at all! So I did some analysis and here is what I found. The low limit snap disc # 1 has a trip Point of 145 Deg +|- 15 Degs so the Min is 130 Degs F. So I dragged out the heat gun and got a Reading where Disc # 1 is located and got approx 133 Degs F ! This is too close to the low end of the spec for me since we are working with a bimetal Snap Disc not a super accurate digital circuit. I also measured the exhaust housing where most snap discs on other stoves are located and got 164 Degs F so if the more common 120 or 140 Deg F snaps were used, then the convection blower would stay running in this case! Ok this is a Quadrafire with a mini stream mount snap disc mounted much higher up on the stove. The hot air does not seem to have a lot of ash here, the discs seem to last but a did change one on another Quad because it was really cycling on and off. In that case the new one fixed it. So back to this case. The room blower does not stay running but does come back on when the flame gets higher. Stove is clean and set to high and the flame adjuster in the hopper was never changed. It is burning some mystery pellets with a lot of fines that may have been sitting in the hopper for a long time! See pics It is a great stove and can burn anything but these pellets really do not look good! So today I will try fresh pellets. Changing out the exhaust blower housing with one that has a nice 3/4” hole for a full size heavy duty ceramic Low Limit Snap Disc is the ideal solution IMHO but I will try good fresh pellets first. So has anyone else had this issue???