Thermal fuse in back, hi-limit on flue, timer...we don't guess...we start checking
Be sure to remove air restrictions to prevent buying more of them fuses my friend.
A bad hi-limit thermostat can cause the T-fuse to blow. So can a bad control thermostat.
I think he is talking about the thermal cut off not the thermal fuse.Thermal cutoff with hi limit kit #'s.279769 & 279816