Furnace Probs - New 5th Wheel Owners

Sometimes when the valve is opened quickly the excess flow shut off can be triggered.
I suspect in the fiddling the valves were closed and all was reset when reopened.

RustyJC wrote:
You probably have air in the propane lines. Turn on your range and try to light a burner. This may take 15-30 seconds to get all the air out of the line before the burner will light. This will purge the air out of the piping between the propane tanks and the range.

Now, you will still have some air in the propane lines from the main line to the furnace. Keep cycling the furnace until it manages to purge the air from the main line to the furnace burner and it should eventually light and stay lit.

The fan only runs 15 seconds because it's purging the furnace before the burner lights. If the burner doesn't light (i.e., if ignition isn't proven), the furnace will shut off.

Also, be sure that the propane valve is turned on at the tanks and the correct tank is selected by the selector valve (if you only open one tank at a time).

Rusty

Agree.

If he kept cycling it trying to get it to fire, chances are all the air finally got purged out and it lit, just like everyone above was saying.

Rusty

Success! I don't know what he did, but it's working now , praise God! :} Oh, he's an electrician by the way!

What you have described is failure to light the furnace! The furnace will try and light, but if no ignition it will turn off. As discussed, the most likely cause is air in the gas lines, since you ran out of propane, and then disconnected the tank. If you have run your stove top since fill up and are sure you have purged all the air, go to the thermostat, and turn everything off, no AC, no reverse cycle, no furnace, completely off. Wait 30 seconds, then turn on furnace, if it still cuts out you have a igniter problem, and will have to call someone to check out the furnace! Good luck!!

Up above as stated, yes, I have used both the stovetop and the hot water which both run from the propane. No problems using either of those with the new bottles.

Again - Have you used the stovetop on this new fillup of propane??? The idea here is to purge air from the propane lines since you have had them disconnected changing out the propane tanks...

The only safety feature I can think of is associated with the blower fan of the furnace. If the furnace fan stops blowing there is a AIR VANE that will shut off the propane fuel that goes to the furnace.

The furnace blower fan is powered by 12VDC which comes from the converter/charger unit when connected to shore power or generator and/or the 12VDC battery... If the ceiling lights are working then this tells you the 12VDC is working and ON.

Roy Ken

I have used the stovetop since the furnace started acting up....no problems. Water heater also works off propane and no problems there either.

Does anything else work on propane? Light your stove on all burners and purge the line of air, then try lighting your furnace.

You probably have air in the propane lines. Turn on your range and try to light a burner. This may take 15-30 seconds to get all the air out of the line before the burner will light. This will purge the air out of the piping between the propane tanks and the range.

Now, you will still have some air in the propane lines from the main line to the furnace. Keep cycling the furnace until it manages to purge the air from the main line to the furnace burner and it should eventually light and stay lit.

The fan only runs 15 seconds because it's purging the furnace before the burner lights. If the burner doesn't light (i.e., if ignition isn't proven), the furnace will shut off.

Also, be sure that the propane valve is turned on at the tanks and the correct tank is selected by the selector valve (if you only open one tank at a time).

Rusty