Temperature control stopped working

Hi!
Looking more closely, the connection to the V+ port for the motherboard melted and becomes very warm when turned on. This seems similar to: 12V Power Supply Connection to Motherboard Melted, although the voltage delivered from the power supply on our eVOLVER seems to hold consistent at 12V. The stir and heating functions operate for a few minutes occasionally, usually after turning the unit back on, and then shut off. Now I am wondering if they function until the connection overheats?