I suspect so. It totally sounds like this thing is in ovetemp/turtle mode. The other threads on this have a jump from P2 over to P21. Without a BDI (Yet) it is difficult to tell. I always thought the temp wires needed to be twisted together to bypass, but what do I know? (more research clearly needed)
If you don’t have a proper pin handy, you might get away by shoving a wire in H21 ← (hole 21) for a test and to get you going.
I think I have some pins I can send you for a more permanent repair.
If you are into pictures- here is convenient graphical description diagram: (Thanks Grant!)
Follow the path of others!