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Old 11-23-2013, 12:33 AM   #1
Arvicru
 
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Furnace question

Hello to all,
I had a question on my furnace. When I am at home camping or summer camping and have to use my furnace it comes on right away and will come on with my thermostat setting. I am in Zion, Utah right now and have to turn my furnace on/off 6-7 times to finally get it to light, and then if I set my thermostat to a set temp. it won't come back on unless I toggle it on/off again. Is there anything I am doing wrong??

Thanks,
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Old 11-23-2013, 09:31 AM   #2
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Here's a link to the Suburban furnace trouble-shooting guide from the forum library for you to look at... Forest River Forums - Downloads - Furnace - Suburban furnace troubleshooting

It could be one of many issues. The problem you describe I've seen when opening or switching propane bottles. Even though I've filled the line and lit the stove, it still takes a few (or more) tries to get the furnace to light.

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Old 11-23-2013, 10:54 AM   #3
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It sounds like it's failing to light, tries several times, and then locks out until you reset it (by having the thermostat tell it to turn off).

If you listen at the outside vent when someone turns it on, do you hear clicking (spark) and then does it light and go out,or not light at all?

If you have a bug screen over the outside vent, take that off and see if it helps.
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Old 11-23-2013, 01:31 PM   #4
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No clicking at first. It is working fine now, maybe there was air or moisture in the line
Thanks for all of the input.
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Old 11-23-2013, 01:37 PM   #5
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Quote:
Originally Posted by BarryD0706 View Post
It sounds like it's failing to light, tries several times, and then locks out until you reset it (by having the thermostat tell it to turn off).

If you listen at the outside vent when someone turns it on, do you hear clicking (spark) and then does it light and go out,or not light at all?

If you have a bug screen over the outside vent, take that off and see if it helps.
Where do you get the info that a bug screen causes a problem?
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Old 11-23-2013, 02:01 PM   #6
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Where do you get the info that a bug screen causes a problem?
http://www.rvcomfort.com/suburban/se..._questions.php
Click on the question about bug screens.

It's also in the manual for the heaters.
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Old 11-23-2013, 02:12 PM   #7
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Airxcel | Suburban Manufacturing Service
Click on the question about bug screens.

It's also in the manual for the heaters.
Interesting, have used them on every trailer we've had (9) since 1976 and never had a problem.
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Old 11-23-2013, 03:08 PM   #8
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Where do you get the info that a bug screen causes a problem?
The suburban install manual says no screens. Of at least the one I have says so. I personally cannot see where this could ever cause a problem.
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Old 11-23-2013, 03:12 PM   #9
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The suburban install manual says no screens. Of at least the one I have says so. I personally cannot see where this could ever cause a problem.
Me either, I think they are reaching on that one. Sure would like to see some actual data proving it.
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Old 11-23-2013, 03:55 PM   #10
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Quote:
and then if I set my thermostat to a set temp. it won't come back on unless I toggle it on/off again.
When I bought my Roo last year, it was doing the same thing. The furnace would fire up the first time, but then not again unless the thermostat was toggled. What seems odd is that there are only 2 wires that are connected together when the switch in the thermostat closes to start the furnace and when the wires are disconnected, it turns the furnace off. What could be simpler? Anyway, I replaced the chintzy Suburban thermostat with a Honeywell RTH111 digital and it's worked fine ever since. I can't explain it, except maybe dirty contacts don't allow enough current to flow when the switch closes.
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