RV Heat Furnace Cycles on three times and shuts off..

newman fulltimer wrote:
your bottles were not properly purged so has alot of air in them furnace is high propane demand.

so get your bottles repurged bet the oroblem goes away

Even though it worked 2 months ago when we first took delivery of the rv?

BUT I have disconnect the main two tanks a few times to install my hitch.

I will also add that all other gas fed appliances work as well. (oven, outdoor stove, indoor stove & hot water heater/LP)