Furnace runs, then quits, propane full, shore power

nevadanick wrote:
The sail switch is inside the squirell cage. Its activated when the cage is blowing air which is why its inside there. I hadto change mine early this year.

Hmmm.... I don't see anything that looks like a squirrel cage. On either end. Inside the trailer it looks like some kind of black manifold. Nothing like a blower or squirrel cage, I do know what that looks like.