Product review (1 stars): ,
These Napco built heaters are not all they may seem to be, Yesterday i had one fail a and nearly cause a fire, the screw which holds the porcelain insulator at the wire connectors worked loose and grounded with the lower high limit thermostat  PART NO (3977767) this in turn caused the screw to weld to the thermostat causing a ground which eventually melted the top high limit thermostat PART N0 (279769) and the wiring. Whilst ground faults are common in worn out elements i have never seen a brand new element nearly start a fire, the element should be re-designed with the screw being replaced by a rivet.

I am a fully experienced technician with many years of experience, i wanted to share this information with other technicians to help avoid this potential danger in these elements.