[Dee67]

Hi, All

I have this 2013 F20, it had heating control panel replaced with a used one to same spec. However, it does not respond to any buttons on the panel. The fan is running and there is the middle green light for fan speed is lit.
In Ista it’s coming up with code 8011CB Control panel on the heating-air conditioning system. Under voltage or Overvoltage error.
Go through the test plan and no stored error detected. Also, the error clears but comes back on as soon as you rescan.
Any ideas will be appreciated..