Surburban SF-25 Gas Furnace No Heat

Furnace was working fine until I ran out of propane. Had propane refilled and drove home. Reconnected house power to RV. Gas stove works. Raised the thermostat. Turned thermostat to heat. Furnace blower comes on for 30 seconds and turns off. I do not smell any gas and cannot hear any electrode ignition "clicking" noises. Parking break is set. I even tries starting the engine to make sure the furnace is getting plenty of voltage. No change in operation.

Any ideas what I need to check. Any help would be greatly appreciated.

Thanks,
Russ