Quadrafire CB1200 Convection Blower not staying on?

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???

 

I put in fresh new pellets and that made a big difference. It seems much better now. The flame is higher.
I did not know about the 2011 tech bulletin on snap disc # 1 being in too tight?
Can anyon post a copy of that bulletin? Like to see it.

Also I heard this only happens on CB1200 inserts and Quadrafire has a fix by changing the way 145 Deg F Snap Disc to a 100 Deg Snap Disc!
This seems like the ideal solution!
Is this the part # for the F100 Deg F snap disc? It says F127 on the switch! The web page states only for the inserts.
812-1560 / SRV240-0470 Quadrafire Snap Disc #1
Click on this link
812-1560 / SRV240-0470 Quadrafire Snap disk

Flame is higher with fresh dry pellets and Temp around the snap disc is higher now but not on low heat. On low heat the convection blower still drops out so the F127 Low Limit snap disc must be the best solution!
127 +/- 20 gives 107 for the trigger so it should work fine.
Goes to show how crappy pellets with moisture and sawdust do not burn as hot!
See pics.

 

The 127 is actually 125 in the owner’s manual.

Looks like there still is a F145 Low Limit in the CB1200 Free Standing & 1000
There is an F110 for Castile and Castile Insert!
And the F125 is also in the 800, contour and mt Vernon. Sounds a little confusing?

 

Hello
Well finally got the solution!
If the convection blower does not keep running on low heat, there is a new part # Disc # 1 Low Limit Mini Snap Disc that is air stream mount!
F100 part # SRV7000-829 !!
This snap disc will resolve the issue!!

Note: The F110 is a surface mount and will not fit properly on stoves with the hole for the air stream mount!!!