Help with Pololu 18v7 motor controller

I seem to have a bit of an issue with the Pololu Simple Motor controller 18v7. The analogue inputs do not seem to work and always show as 4.3V (High). I have also noticed the temperature always says 148 Deg C and never changes. I have changed the upper and lower temperature limit so that the fault clears. The controller then seems to work ok i.e. I can control the motor via serial - motor speed and direction is working fine and I can get status from the controller. I am trying to set the Analogue inputs as FWD and REV Limits however, it seems that the controller has a HW issue and is faulty. Looks like the internal AtoD is faulty.

Can anyone suggest what I am doing wrong or how I go about getting the controller replaced if faulty?