Nt-20SEQ Furnace not working correctly

Here is the original video of what the furnace was doing.   I decided to take the unit completely out last night and do some bench tests.   I removed from housing, put on my workbench, connected propane, connected to 12vs, touched the two blue thermostat wires together and the furnace ran beautifully. So my thought since it ran fine on my workbench that my thermostat in the camper was the issue.   I reinstalled furnace, connected to the thermostat to call for heat.  Same non working results in video.  Disconnected thermostat and connected the two blue wires together and works like a champ!  So my issue is my campers thermostat.  Have a new one on order.   Thanks for all the comments and suggestions.