Originally Posted by tonyz
Is there an access to the photo cell and anything particular to clean it with? Now that it is home, I hooked up to shore, full propane, and I hear a click about every 20 seconds from the furnace until it shts itself off after about 3 minutes of no heat.
Clicking is good as long as it is sparking to light the propane, if no spark then the photo cell can not see the flame because there is none but do you hear the fan motor coming on, this would be the draft motor, this is what actives the sail switch, once the air is proven then the gas valve will open, but again no spark no flame the system will shut down after the draft motor runs for a few minutes to clear the unburn gas out of the fire box. For the most part all of the componets should be accessable from the out side of the camper.
One other simple thing to check go out side and make sure that the fresh air intake is clear, there are two chrome ports mark "HOT" on the unit one is an intake and the other is exhaust....with out it operating look inside of both of these ports, they must be clear from bug, bees or anything else.