HELP!! Furnace won't work

Are you operating on shore power or batteries? If on batteries they could be low not allowing the fan motor to spin fast enough to close the sail switch.
Operating on shore power, the sail switch could be not closing. A can of compressed air could blow the debris out of sail switch.
Make and model of furnace?

If your stove top is burning you can sort of rule out frozen propane lines feeding trailer.

Assuming your 12VDC is all working ok. i.e. Ceiling lights ok...

The BLOWER FAN has a sail that get sucked in when the blower start up. That keeps the propane value open. Might check to see if that is working...

Hope you brought along alternate heat for PLAN B

Roy Ken

If you recently changed propane bottles and had the system open, it might be as simple as air in the line to the heater. It might take a half dozen restarts with the thermostat to get the air purged. Just went through that on our last trip. Had me worried for a few minutes, because it was going to be cold that night.

If the burner doesn't light, the system shuts down to prevent raw propane buildup.

I hope it is a simple thing like that.

we were in bryce last week, cold but we primarily used our fireplace.

sorry about your furnace...hope you get it working

could be the mother board or low bat

I am on shore power and I'm sure the propane is not an issue as we have used all propane appliances including the furnace since switching propane tanks.

This is a new trailer with a Suburban furnace. I'm not sure of the exact model as I'm not at the trailer right now but will get it in few minutes.

This happened to us before and the dealer said the problem was manufacturing debris that had been left in the furnace area. So I'm thinking it may need cleaning again. How do I access it and clean it?

Thanks

Why didn't dealer clean it out?
Depends on model!
Some it is very easy to access from access door on outside. Easy to use compressed air to blow it out.

enblethen wrote:
Why didn't dealer clean it out?
Depends on model!
Some it is very easy to access from access door on outside. Easy to use compressed air to blow it out.

Why did the mfr leave it there in the first place?

Lyle

sounds like the dealer just told you a story, I,d start with your battery you gotta have 12volts , even plugged into shore power.

IF on shorepower than your converter should be supplying 12V DC power

Fan starts runs when t-stat calls for heat.......but no main flame

When fan comes up to speed (at least 75%) the sail switch closes........12V DC is then sent thru sail switch to/thru limit switch to control board. When purge is complete 12V DC is sent to gas valve to open it at same time DC Voltage is sent to spark electrode which lites off main flame...main flame then produces milivolt signal that goes back thru spark electrode control board to hold gas valve open until temp set point on t-stat is satisfied.

DO you hear any click, click, click........sprak electrode trying to light main flame?????

No clicking..no spark...no main flame

Could be sail switch not closing, could be spark electrode/high voltage wire bad, could be control module....could be electrode not positioned directly in main flame.

Which MODEL of furnace.......may be able to test in place or might have to pull out and bench test.