Time to wake up the Espar diesel heater I've been hoarding for years. I've got one in the trailer and it's worked like a champ for years. The D1LC is getting pretty old, they haven't made it for awhile so parts are getting rare and expensive. My guess is this one is from around year 2000. Luckily I've been cherry picking eBay for years and have a few spare parts. I did a maintenance rebuild on this one, like the one I did on the trailer heater:
Espar Service
You get three tries to get these to run, after that they lock out and you need a special (very expensive) tool that I don't have to clear the error code. So if there's any problems with the fuel line, connections, etc, you have to figure them out quick. The end of the pickup fuel line was poking up above the level of the fuel, that's one failed start! Then, success!

Make sure and get the muffler if you get one of these, it makes a big difference:

Now I can drill a bunch of holes in the van floor to install it.
Bruce