When you ran out of propane you probably didn't turn off appliances that were using the propane, so propane lines were depleted of any pressure
So when you refilled you cylinder and then valved it into service the demand downstream caused the excess flow device to trip
Close service valve....wait 30 sec. then SLOWLY open service valve
Turn on stove top burners on high to PLACE A DEMAND on REGULATOR and ESTABLISH FLOW (there is no air to bleed/purge)
With stove top burners in service try furnace again...
It may take a few attempts to get flow established at furnace
(Furnace is shutting down due to lack of 'Flame Proving' cause falme is not lighting off due to lack of propane flow)
And how come you ran out.......do you only have one propane cyclinder??
Is it time for your medication or mine?
2007 DODGE 3500 QC SRW 5.9L CTD In-Bed 'quiet gen'
2007 HitchHiker II 32.5 UKTG 2000W Xantex Inverter
US NAVY------USS Decatur DDG31