This is a new nordyne furnce model # M7RL it will fire up then run for a while then the burner goes off then restarts again. But with the door off and no filter in place it works just fine? It done these since it was install .

The fan don't work. So the heat is stuck in furnace.
And the thermostat shuts it down sooner. If rat
Wheel or blower don't push heat into rooms.
Furnace will shut down very soon. If you open
It it cools off and runs again fix air flow. You
Must have forced air system. Well that's
What happened to me years ago. Maby
Landlord will fix it then burn one

This is a new furnace when the door is on the furnace and the filter is in place ,the furnace will fire up run for a while then shut down and then fire up again ,and will keep doing that , But when I remove the door and filter it run just fine.
This is can not be normal.