Suburban SF-35 Propane Furnace won't ignite
I'm stumped. I live full-time in Newmar 5th wheel. Pretty standard Suburban SF-35 propane furnace with (2) 30# propane bottles with auto change over regulator. I ran completely out of propane. Obviously no propane no heat. I filled bottles as usual, opened valve slowly and the furnace will now not light. I have gas at stove and at the hot water tank with no problems.
I have pulled the fuse and replaced it with one the works. I have switched tanks and verified it's not a tank issue. When I set the thermostat to "furnace" position and raise the temperature setting to call for heat I can hear a relay "click" sound and that is all. This furnace has worked well and has been run out of propane before. I removed the exterior cover and there is a 5 amp fuse that appears ok. I have 12.4 volts at the battery. Ideas??? Thanks