Furnace clicking

Everything seems to be working. Thanks for the advice.

My furnace did the same thing on 3 occasions . The first time (this is going to sound dumb) i took my leaf blower and forced high volume of air into the vent from the outside. The furnace started after doing that and ran fine for the remainder of the season. It was dusty.
Had the same problem the next year and the leaf blower worked for the 2nd time. There was a dead broken up leaf inside the tube.
The 3rd time it happened, the leaf blower did not work.
My mechanic told me to light the stove burners and fire up the water heater to see if the flames changed (diminished). He told me the WH uses more gas for the initial start up and that's a good way to tell if the regulator is weak. If that happened, it would indicate that the regulator was bad at the tank.
I ended up replacing the circuit board .

I would give it another day if its warm enough to really dry it out.

if it still doesn't light, we have to get into the model and take baby steps to check grounds, thermocouple or sail switch.

When the fan spins (most have good battery voltage) the sail switch activates to fire up the furnace. Sometimes the sail switch goes bad. But, the circuit boards are so sensitive, im leaning that way as of now. I bought an extra board because its easy and fast to swap out to test it. If its not the board, then i dig deeper but that takes time.

I'll be on the road for a month and don't know what kind of service i will have . I fish/camp off grid in the middle of nowhere.
View the youtubes of rv furnace troubleshooting to get a visual of what to do .

So I checked it out, the clicking has stopped. So I am thinking water must have some how gotten in there. I tried to start the furnace, the fans starts and you can hear it try to light, but it won't. It goes through 3 cycles and then shuts off. Any ideas on how to get it started? I did check the gas, stove lights no problem so there is propane.

Thanks for the post, I will try that tonight when I get home

pull the fuse, see if it stops clicking .... if so ,

I think you might have some water inside the furnace tube from spraying the water when you rinsed it. Moisture on the circuit board will do it.

Use a hair dryer as best you can to dry things out .

There was some info where this happened on a Jayco i will try to find it for you.



here it is,
http://www.jaycoowners.com/forums/f34/furnace-making-clicking-noise-36484.html

the thermostat is completely off.

Is the thermostat truly off or is it just turned down really low? If it is truly off then you have a problem with the thermostat. It's defective, has some wires crossed, got wet inside, or something. Check it with a volt meter.