Furnace procedure - Page 2 - Fiberglass RV


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Old 09-19-2011, 05:18 PM   #15
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Under normal conditions it should stay on until the propane runs out. Dont know but I suppose if the propane was *real* low there may not have been enough pressure for the furnace to stay on. Very high temps and very low temps will impact how well propane burns, as will altitude. If the furnace is running correctly and its close to freezing it will impact the pressure but not enough on its own for you to even notice or for it to shut down - it has to be a *lot* colder than that before you start having serious problems with burning propane. I use propane a lot at well below freezing. In high altitude there is also less pressure, so if you where at very high altitude and had low tank pressure to start with that combo might give you problems before the cold does.

Dan what brand of furnace do you have in your Scamp? I never need to light the pilot on mine - it has an electric start so I just turn the temp up on the switch in the trailer and it turns its self on and off during the night.
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Old 09-19-2011, 05:57 PM   #16
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Well, it was at elevation, maybe 8500'. When it wouldn't light up, and I ran the stove, the stove's flame did have some yellow.

I don't remember the brand, will check when I get home (and look at the manual if it's in the document bank). It doesn't have a pilot, it has the electric start. It was switching on and off, but in the middle of the night it wouldn't ignite. The fan was blowing cold air and I could hear the "click-click" of it trying to ignite. It's possible that had I left it, eventually it would have, and it's possible the had I let the stove go a little longer, it would have, I don't know.

The regulator does look kind of beat up, is it possible that it's letting air into the line? Maybe when it gets cold and things contract a little?
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Old 09-19-2011, 10:18 PM   #17
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Thats getting up there but I ran all my propane stuff this summer at that elevation and higher for a couple of weeks without much of a problem - fridge struggled a bit more than normal to stay cool but the temps where also pretty high during the day. Not the best of conditions for the old fridge - running a small fan in it helped.

Have you tried the furnace since on a full tank? If the furnance kicks in as it should - then you know its a pressure issue due to being high and on a low tank - in which case Im not sure but it may still help in the future to replace the regulator. If it does not kick in as it should on a full tank then perhaps the electric start has an issue or it could still be the regulator not allowing enough gas through. If the stove isnt burning a nice blue flame then that would indicate that you have some cleaning to do on the stove burners or there isnt enough pressure for a clean burn - which again may be the regulator - not sure what else it might be or if its possible for the lines suppling gas to both the stove and the furnance to get dirty or clogged somehow - a kink in the line maybe? Hope someone with more knowledge than I can address that.
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Old 09-19-2011, 10:21 PM   #18
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I just went out there and looked for a model name/number, didn't see any. Hmmm...

I did, however, try to fire it up (on the same "low" tank, but I'm now at 5500' elevation and it's ~70 degrees). Ran the stove for a minute or two, then turned the furnace on and it fired right up. So what's that all about?
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Old 09-19-2011, 10:38 PM   #19
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Its probable a Suburban furnace - check the Document center here for a manual for it. It may be a pressure issue and your regulator may not be working properly or adjusted properly or you have a small leak, so that when you get into higher elevations (and colder weather although I suspect the elevation impacted it more than the cold) the pressure drops just enough to stop the furnance from getting enough gas to kick in. I would have the gas pressure and leak tested and adjusted.
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Old 09-19-2011, 11:25 PM   #20
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Good news! I didn't blow up my Bigfoot!

The furnace lighting protocol was exactly as you guys described it. Fire up the stove, turn on the thermostat, crank up the heat.

When I bought the trailer, the guy who sold it to me said he never tried to use the furnace. I interpreted this as code for "the furnace doesn't work, but don't blame me". I was thrilled when that sucker fired up on the first try!

Now for some winter camping!!!!!

Many thanks again for all the tips!
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Old 09-19-2011, 11:42 PM   #21
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Quote:
Originally Posted by Shaidah View Post
Good news! I didn't blow up my Bigfoot!

The furnace lighting protocol was exactly as you guys described it. Fire up the stove, turn on the thermostat, crank up the heat.

When I bought the trailer, the guy who sold it to me said he never tried to use the furnace. I interpreted this as code for "the furnace doesn't work, but don't blame me". I was thrilled when that sucker fired up on the first try!

Now for some winter camping!!!!!

Many thanks again for all the tips!
THANKS for the follow-up, we often don't here of the outcomes!
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Old 09-20-2011, 09:17 AM   #22
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Quote:
Originally Posted by Carol H View Post
Its probable a Suburban furnace - check the Document center here for a manual for it. It may be a pressure issue and your regulator may not be working properly or adjusted properly or you have a small leak, so that when you get into higher elevations (and colder weather although I suspect the elevation impacted it more than the cold) the pressure drops just enough to stop the furnance from getting enough gas to kick in. I would have the gas pressure and leak tested and adjusted.
According to the thermostat, it is a suburban.
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Old 09-20-2011, 09:55 AM   #23
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Quote:
Originally Posted by Shaidah View Post
Good news! I didn't blow up my Bigfoot!

The furnace lighting protocol was exactly as you guys described it. Fire up the stove, turn on the thermostat, crank up the heat.

When I bought the trailer, the guy who sold it to me said he never tried to use the furnace. I interpreted this as code for "the furnace doesn't work, but don't blame me". I was thrilled when that sucker fired up on the first try!

Now for some winter camping!!!!!

Many thanks again for all the tips!
How badly did that burning dust stink? Glad to hear you can stay toasty! I find in our trailer for fall camping, if you have the pilot light on, and leave the thermostat at 10*C, the furnace usually won't come on (however, there are 2 adults, 3 kids and a dog sleeping in our trailer, so we generate a lot of our own heat!).
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