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GLBCamper View Drop Down
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Joined: 30 Jun 2015
Location: Oregon
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Posts: 274 		Direct Link To This Post Topic: Furnace cycling
    Posted: 27 Oct 2015 at 1:50pm
Well, another cold morning in the 30's. Not camping, but went out to the pod and ran the furnace to test it. It ran perfectly and did not cycle off until the inside had come to a comfortable temperature (after about 20 minutes.) So I'm not going to worry about it until next spring and see if it happens again. Thanks to all.
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Keith-N-Dar View Drop Down
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Posts: 1447 		Direct Link To This Post Posted: 27 Oct 2015 at 10:23am
Originally posted by pnwcamper

I thought the cold air intake was on the outside the camper? Confused


Only if the aim is to heat the campground.  Combustion air may come from the outside but heaters draw cold air from the conditioned space into the heater and send out heated air.  If the circulation is not sufficient to remove enough heat from the furnace it will shut off until it cools off.
Keith-N-Dar
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CharlieM View Drop Down
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Posts: 1797 		Direct Link To This Post Posted: 26 Oct 2015 at 9:11pm
GLBCamper: Something sounds amiss. The furnace should not cycle off a 45F. Maybe, as Kieth-N-Dar suggest, there is an air blockage. The furnace must be able to get a good supply of cool air from within the Pod to avoid overheating. For combustion, the furnace draws cold air from outside, feeds it to the burner via a combustion fan, and exhausts the combustion products back outside. The inside air and the combustion air do not mix. They are separated by a heat exchanger. 
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GLBCamper View Drop Down
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Posts: 274 		Direct Link To This Post Posted: 26 Oct 2015 at 7:48pm
Originally posted by Keith-N-Dar

The other thing to consider is if your Pod is configured like our 177 with the cold air intake under the bed, and you store things under there, the cold air return is down there also and if you are partially blocking the return the bonnet switch in the furnace will shut it off when the temp goes to high.  We move out the stored things and put them on the table at bed time to prevent this.  Ours cycled like crazy until we figured this out.

The furnace is under the bed (which seems odd to me) I learned that anything stored in the little "storage area" in front of it gets way too hot. So stopped putting anything under there (except my slippers, so they're cozy!) Anyway, nothing blocking anything under there.
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pnwcamper View Drop Down
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Posts: 38 		Direct Link To This Post Posted: 26 Oct 2015 at 7:47pm
I thought the cold air intake was on the outside the camper? Confused
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Posts: 1447 		Direct Link To This Post Posted: 26 Oct 2015 at 7:42pm
The other thing to consider is if your Pod is configured like our 177 with the cold air intake under the bed, and you store things under there, the cold air return is down there also and if you are partially blocking the return the bonnet switch in the furnace will shut it off when the temp goes to high.  We move out the stored things and put them on the table at bed time to prevent this.  Ours cycled like crazy until we figured this out.
Keith-N-Dar
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2010 Ford F-150
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GLBCamper View Drop Down
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Posts: 274 		Direct Link To This Post Posted: 26 Oct 2015 at 7:41pm
Originally posted by CharlieM

It's probably normal for the furnace to cycle more when the Pod is cold. The furnace will quickly heat the air and the thermostat will think it's warm. However, the walls etc. will still be cold. As soon as the blower stops the air around the thermostat will cool and the cycle begins anew. Eventually the walls etc. (and you) will warm and the thermostat will quit being so picky. The wonders of physics. 

But.. The thermostat is set to 65 and the furnace will cycle off when it's not more than 45 inside. There is no way the thermostat thinks it's anywhere near 65. I know that once it's at or near the call temp it will cycle to maintain that temp. But it doesn't make much sense to me to shut off every few minutes on the way up to the call temp. But maybe that's normal for the pod's furnace? Furpod says no. I'm out of warranty so don't want to take it in if that's just the way it works.
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CharlieM View Drop Down
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Posts: 1797 		Direct Link To This Post Posted: 26 Oct 2015 at 6:29pm
It's probably normal for the furnace to cycle more when the Pod is cold. The furnace will quickly heat the air and the thermostat will think it's warm. However, the walls etc. will still be cold. As soon as the blower stops the air around the thermostat will cool and the cycle begins anew. Eventually the walls etc. (and you) will warm and the thermostat will quit being so picky. The wonders of physics. 
Charlie
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SNO4ME View Drop Down
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Posts: 122 		Direct Link To This Post Posted: 26 Oct 2015 at 11:00am
Originally posted by pnwcamper

I'm not sure this is the answer but here is what I have experienced.

I have noticed if my pod is cold (furnace has not been on) the furnace will cycle more in the beginning but once the camper heats up and everything is warm it cycles less.

Also, I assume the colder it is outside the more the furnace will cycle.



Interesting article in the new Trailer Life magazine about the guy that spent the winter in his Pod in the Yukon.
His furnace ran, A LOT!
Bruce & Donna in the Sno Pod
(and Brewer too)
2011 RP 177
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Joined: 28 Sep 2013
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Posts: 122 		Direct Link To This Post Posted: 26 Oct 2015 at 10:56am
Originally posted by pnwcamper

I'm not sure this is the answer but here is what I have experienced.

I have noticed if my pod is cold (furnace has not been on) the furnace will cycle more in the beginning but once the camper heats up and everything is warm it cycles less.

Also, I assume the colder it is outside the more the furnace will cycle.



We had that on a cool evening this fall. We were out by the fire kinda late and didn't turn the furnace on till we came. Should have turned it on a least an hour earlier to stabilize the temperature better.
He he, oh are we a spoiled bunch of happy campers.LOL
Bruce & Donna in the Sno Pod
(and Brewer too)
2011 RP 177
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