I mistakenly posted this in water heaters, sorry.
Anyway, I had our furnace in our 2016 28’ go out in the AM after working the eve before.
We had a VERY bumpy road and heavy rain.
The furnace fan would come on and the furnace would light for about 4 seconds and stop. This happened 3x before completely shutting down.
The circuit board LED would flash 3x followed by 3 sec pause, indicating an “ignition lock out”.
Researching the forum brought a plethora of possibilities. Mostly a board failure kept showing up.
The board showed signs of water corrosion on it for which I will now caulk the door.
I have also coated ALL connections with dielectric grease.
I purchased a new Dinosaur replacement and it fired off immediately!
I have included old board and new board pics.
Hope it helps anyone else.
2016 Int. Signature 28' w/ ProPride 3P-1400 Hitch
Mich. LTX w/ 16" Sendels, Centramatics
2017 Ram 2500 4x4 Diesel, CG1800 Bed slide, Leer topper
Better to live one day a lion than a lifetime a sheep. Camp hard, camp often