Furnace gas supply problemn solved
I thought I started a thread about my furnace problems a few months ago, but I canít seem to find any post that deals with it. The last time we used the Airstream in late fall last year I couldnít get the front furnace to light. No big deal, we were at an Idaho Power RV park so we had ample electrical capacity and used the heat strips in both air conditioners. When we wanted some early morning extra comfort the rear furnace did the job for a couple of days, then it also refused to light. I had gas to each unit, there were no obstructions to the air flow in either unit, etc. A friend told me to light the range burners, then turn on the furnace and see what happened to the flame. Well, I thought I saw some variation so assumed that the regulator might need to be replaced. Did that a couple of weeks agoó still wouldnít light.
I am fortunate to have a friend who has spent a lot of years as an RV tech (now in another business). He came yesterday and pulled both units. The burner orifices in both units were clogged! The material seems to be a mineral of some sort. Several years ago a tech told me that propane lines can accumulate a deposit that can flake off. His recommendation at the time was that I should not turn off the gas supply during the off-season. He speculated that with the propane in the lines there was less chance of flaking. Iíve followed his advice since then, but this year something definitely was causing foreign matter in the lines. I donít know the probability of both units being affected at the same time, but it happened. No problem clearing out the material from the opening and both furnaces are now serviceable. So, if you are having similar lighting problems and all else fails, you might want to give a look-see at your burner orifices. By the way, so far Iíve had no problem with the water heater. Also, if I have future issues, Iíll probably replace the gas supply line just in case it is a flaking issue.
'92 Limited 34ft (now sold); '96 Dodge Cummins 4X2, 5speed