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Old 05-03-2016, 11:41 PM   #1
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Furnace couldn't keep up - 368rlbhk

We spent the first night in our brand new Hemisphere 368rlbhk this past weekend. Overnight the temp dropped to the low 40's / high 30's in northern WI and the furnace ran all night. With the thermostat set at 67 the actual temp never got over 64 causing it to run all night. This is my first RV that couldn't keep up with 40 degree temps. Do I take it out of our seasonal site and have the dealer look into it or is that normal for a large unit like this? The furnace is a 35k btu so that should be plenty right? I even optioned the unit with the extended season package when custom ordering it. Thanks in advance.
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Old 05-09-2016, 04:27 PM   #2
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Stayed two more nights in the camper this past weekend. Overnight lows in the low 50's and the furnace ran all night both nights and only caught up once. Something must be wrong. I don't think there is enough air flow from the blower fan.
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Old 05-09-2016, 04:31 PM   #3
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Pull the inside panel to get access to the air box inside the RV. Check to insure that the ducts are hooked up and than none of the duct ports on the air box are open with no duct. Your furnace should be able to keep up at those temps. If the air flow was too low, the furnace would shut down due to over heat. If the ducts are not connected properly, you cold have a nice warm underbelly, but cool living area.
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Old 05-09-2016, 09:51 PM   #4
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I concur with FlyBob (but was more wordy when discussing the same issue here)
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Old 05-09-2016, 10:17 PM   #5
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That's why they sell those electric heaters at WalMart
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Old 05-09-2016, 10:22 PM   #6
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+1 on something wrong. 35K BTU should be good for 20-25 degrees.
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Old 05-09-2016, 10:26 PM   #7
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Quote:
Originally Posted by Flybob View Post
Pull the inside panel to get access to the air box inside the RV. Check to insure that the ducts are hooked up and than none of the duct ports on the air box are open with no duct. Your furnace should be able to keep up at those temps. If the air flow was too low, the furnace would shut down due to over heat. If the ducts are not connected properly, you cold have a nice warm underbelly, but cool living area.
My suspicion is either the main trunk / trunks are kinked or loose causing all the air just to recirculate. The furnace is in the pass through area so I will have to remove the wall to start the investigation. I am hoping it's not a problem under the lower body cover somewhere. I don't feel like opening that can of worms. I know the "handy" work of the sloppy assembly technicans is going to drive me insane when I start looking around under there.
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Old 05-10-2016, 09:16 PM   #8
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Well there is at least part of the problem. The factory assembly ding-dongs kinked 3 out of 4 ducts. They ran a water line right through one of them... Idiots.
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Old 05-10-2016, 09:45 PM   #9
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Well there is at least part of the problem. The factory assembly ding-dongs kinked 3 out of 4 ducts. They ran a water line right through one of them... Idiots.
. They ran the water lines through the duct or just enough to collapse it?
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Old 05-11-2016, 12:22 AM   #10
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On my last camper, one of the duct lines was cut too short and never connected to the heater. I bought the camper used and it had been that way for 5 years.

Love the pic of the crushed lines. Gotta love the quality of a Goshen build.
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