AFter changing the controller, My bed will only heat for about 45 seconds and then it errors out. I can reset the board, and then get another 45 seconds. I repeat this until i get to my desired goal. Not sure what has changed.
First, what is the error?Marlin has a timeout to prevent thermal runaway. Did you edit/load the firmware? If so, look in the configuration.h and configuration_adv.h to see what your value are set to.