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[D and C Kincaid]

On our last trip we discovered that our furnace would not ignite. We tried to trouble shoot it, thinking that since it had worked the previous winter, and we could hear clicking, and the fans came on, that probably the issue was due to some sort of critter blocking the nozzle to the burners. When we opened things up, we discovered a closed up unit, where the igniter area is enclosed in a tube. So after returning home, took it to a local RV repair place to have the furnace diagnosed and repaired. They found the circuit board to be functioning without problem, so took the furnace apart, found some dirt in various locations, cleaned it up, put it back in, and viola!, it worked. They ran it off an on all afternoon, and it seemed to be functioning fine. We brought it home, and I didn't try the furnace until this morning. It did exactly what it was doing prior to the repair shop, fans on, lots of clicking, and never igniting. And yes we do have a full propane tank. Yes, the valve was open, and yes, the stove burners and the refrigerator all ran without problem. The only variable that I could think of was in the instances where we had failure and again this morning, was that the slider was extended. The repair shop likely did not run the slider out. So I ran the slider back in, and the furnace fired up without any issue, and is still running without problem. So, I am thinking kink in the furnace line somewhere that is being triggered by the slider extending. Since the propane lines split into four lines behind the tank, and run out of that area together, and the other appliances all work, probably in some area where that line is alone. The furnace sits pretty much above the wheel well, and I am not seeing any easily viewed gas line in that area. Anybody else have this problem, and any suggestions for finding where that kink might be?