Norcold Recall Box...RED LED light ON
That means it has tripped due to HIGH-HIGH Temp (700*F) via sensor on burner stack
*inspect burner area and backside of fridge cooling unit tubes for any signs of 'yellowish' residue
Find some....cooling unit has leaked is toast.
Yellowish residue is Toxic....clean up working it wet. No air blowing etc that could created DUST
That means the circuit board has faulted....Check which REVISION Letter you have via slot in cover.
Should be 'E' version
*earlier version had circuit board fgailures
That means circuit board has gotten wet )rain/washing RV)....let it dry out and loosen clamp point, it downwards and tighten clamp
Version 'E' can be reset using strong magnet
Place magnet on face of recall box top area and move it slowly back/forth ....listen for 'click' and RED LED going out