(Thermal Fuse is 'resettable'....button in middle/push in---if tripped NO DC)
**I could not find a 'thermal' fuse on the rear board. However, there are two smaller white wires coming from a plug where the schemetic says the 'thermistor' is. I chased and lost them between the rear wall and tube steel. I checked the display board and couldn't see that they terminated there. (I'm not familiar with a thermistor, but I did find two devices on the display board labeled SW3 and SW4 which resembled some kind of switch, and pressed each one with no reactions.
Also, the two white wires I mentioned appear to go into the ref. and attach to one of the cooling 'fins'.