its possible
the unit uses a sensor that feeds back to a circuit board
it may be the sensor which looks like
https://www.amazon.co.uk/C00314220-Microwave-Sensor-Temperature-J00216941/dp/B07X2Y74PX
or it could be the board
cant find anyone with stock so it would need to be checked if its still available
likely price of about £50 ish
there are also error codes that come up if the sensor is wildly out and your not getting any
suggestion
get an oven themomter, set temp on lowest. Then run unit and see what temps you get (Convection oven only)
Dave