would anyone have an idea what the fault code of 15 is on an eberspacher D2 24v heater, it runs the pump and fuel is getting to the burner the fan runs and there is voltage to the glowplug but it will not fire up and then shuts down, showing number 15. this is most annoying as I have used trucks with heaters in for years and never had one fail now I have had the computer on the one in the camper go £400, and now the one in a merc atego wont fire up either,
Overheating lock out. Check the air intake, it may be blocked with dust, a piece of paper, a spunky sock etc. 