Bed and hotend heat cuts off before reaching set temperature.

[Brmatt]

I am using a rostock max v2 with the duet Ethernet and 5 inch paneldue LCD. When i set the temperature for the bed and/or nozzle, it starts heating and the red heating lights on the board turn on, but after it heats maybe 10 degrees Celsius it stops heating and the heating lights turn off. Something with the paneldue? Heater uncoupling maybe?

[dc42]

Have you run the heater tuning? Check the GCode Console page of DWC or PanelDue for error messages, and see https://duet3d.dozuki.com/Wiki/Tuning_the_heater_temperature_control.