My VC3.1 500 has been running well and had been doing some large prints. Then suddenly, it began shutting down before the print when the heated bed is turned on. I checked all electrical connections and everything wiring wise is fine and the SSR is sending 120 to the heated bed. The printer goes into the shutdown failsafe quick enough that I cant feel a noticeable temperature on the bed, so I can't tell if it is a heater problem or thermistor problem. Any thoughts?
Solution
Replacing the thermal fuse worked! The bed is now heating and got through a benchy without issues. Here's the fuse I ended up putting on it: 157C, 15A. https://amzn.to/3vhviez