Getting furnace running

Happy Holidays:

I'm taking my 2910 out for the first time in winter. The furnace is coming on. Has propane, valve open, thermostat on furnace, set at 75. The heat strip works, but not the furnace. Thanks for any help I get. Rick

I'm not a furnace expert but I'll try.

How do you know the furnace has propane?  Has it been used before?   Has it produced heat before?  If not you might make sure there is propane in the coach by lighting the stove.  Then cycle the furnace several times.  Just because there is propane to the stove doesn't mean the lines to the furnace are cleared of air yet.  Especially if has never been lit before.

Is it lighting and then going out? Might be the thermocouple.

Is it opening the gas valve but not lighting?  Might be the ignitor is not lined up correctly.

Some units will time out after 2 or 3 tries to light and you either have to wait for a reset or hit a button someplace to reset the safety.  Depends on the model.

What Jatrax said plus..

You say the furnace comes on... Does that mean you hear the fan start?  After the fan starts, after 10 seconds or so, do you hear a flame sound, it's obvious.  If the fan comes on and within 5 seconds or so shuts off, that's the "sail" sensor... It senses airflow from the fan, no airflow (says the switch) it'll shutoff, not even try to light the flame.  If you hear the flame, but it quickly (a few seconds) goes out, that's the flame sensor.  It thinks there's no flame, shuts it down.

If you get no flame at all... Probably the ignitor.

One other thing can cause problems, if you have the LED thermostat, it may need reset.

With the LED Thermostat off (green led out) push and hold the "+" button, keep holding it and push the on-off button, hold both until you see two dashes in the display.  Release both the buttons and then hit the on/off switch briefly.   Wait for the green led to go out.   The thermostat is now reset.   Try the furnace setting again, it may work now.

If you don't have the LED thermostat, then it's time to take to an RV repair shop.   Propane furnaces are not something to mess with if you don't know what you are doing.

Don

My original posting a few hours ago said to press and hold the "-" button
WRONG... It's the "+" button you press and hold, then press and hold the on/off button until you see two dashes, then release.  I have edited my original posting... But if you or someone else saw that, hopefully you'll see this and use the correct procedure!  Sorry for the original error!

Notice you're in Texas, so you might want to check for dried mud in or around the gas line air mix.  When I lived there, "dirt daubers" (mud wasps for people outside TX) liked to make their nests there.

Notice you're in Texas, so you might want to check for dried mud in or around the gas line air mix.  When I lived there, "dirt daubers" (mud wasps for people outside TX) liked to make their nests there.

Good point.  And not just Texas.  When I was in Pennsylvania a recurring task was digging the mud out of the gas furnaces' orifices in all of the greenhouses every fall.  It was just an annual "winter start up" task, because they plugged up every furnace, every year.

Make sure your thermostat fam is set on Auto

Thanks for all the advise. I think it just needed the air cleared out of the gas lines. I went back to try turning on again, and it started up.

Thanks for all the advise. I think it just needed the air cleared out of the gas lines. I went back to try turning on again, and it started up.

Yeh, that has been my experience, but with the fridge.  I get close to wondering if there is a problem, then it starts working.  I first run the stove to fill the line with propane, but it still takes many attempts before the fridge starts operating.  Once it starts working, it's perfect for the entire season.