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Old 11-02-2021, 07:09 PM   #1
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Furnace blowing warm air

I have Jayco eagle 5th wheel. Turned on heat and the furnace kicks on as expected. However the air temp at the floor register is ~90 degrees and there is a constant flow of cooler air ~60 degrees coming out of the ceiling (a/c?) ducts Seems these 2 are competing with each other and it takes forever for the camper to warm up. If I close all the ceiling ducts the whistling air makes it impossible to hear the tv.
Any thoughts? is it possible the a/c and furnace are both running at the same time
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Old 11-02-2021, 07:22 PM   #2
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Sounds like your thermostat wiring is crossed up, causing both fans to run at the same time on a heat cycle. By chance, did you ever notice air coming out of floor vents when running the air conditioner?
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Old 11-02-2021, 07:36 PM   #3
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To the Op
What year Eagle
If it's a new one 2021 there is a software update for the bpmpro that allows you to turn off the AC fan when furnace is on. The updates are thru the google store
We don't have the bpmpro on our trailer. Just passing on info

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Old 11-02-2021, 08:50 PM   #4
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Roadpop,

Welcome to JOF

On some Jayco paired furnace-A/C systems (like my Dometic) having the wall thermostat fan set at "AUTO" (in lieu of 'high' or 'low') will eliminate the condition you described.

Bob
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Old 11-03-2021, 05:05 AM   #5
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Originally Posted by ShotgunZ71 View Post
Sounds like your thermostat wiring is crossed up, causing both fans to run at the same time on a heat cycle. By chance, did you ever notice air coming out of floor vents when running the air conditioner?
Thanks. I never paid any attention so I’m not really sure Do you think the 90 degree air is correct? The exhaust air is 200f plus when the furnace is running. Would be nice to capture some of that
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Old 11-03-2021, 05:06 AM   #6
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Roadpop,

Welcome to JOF

On some Jayco paired furnace-A/C systems (like my Dometic) having the wall thermostat fan set at "AUTO" (in lieu of 'high' or 'low') will eliminate the condition you described.

Bob
Thank you. I’ll try that this morning - try the easy thing first
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Old 11-03-2021, 05:08 AM   #7
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To the Op
What year Eagle
If it's a new one 2021 there is a software update for the bpmpro that allows you to turn off the AC fan when furnace is on. The updates are thru the google store
We don't have the bpmpro on our trailer. Just passing on info

RoadrunnerII
Thank you. It is a 2021 with BM Pro panel. I’ll see if I can find the update online today. Really appreciate all the responses
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Old 11-03-2021, 05:48 AM   #8
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in our last fifthwheel,we do have a digital thermostat, and you have to set it up to automatic,because if it's not automatic, the fan from the ac will start on low or high .so to close that fan from the ac set your thermostat on automatic.
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Old 11-03-2021, 08:08 AM   #9
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On our Pinnacle on the BMPRO panel when you select furnace, there is an option to shut off the fan. I thought that was strange because I would want the fan running for the furnace. Turns out it shuts off the AC fan like described above. Weird but it makes it do what it is supposed to and when you turn it back to AC there is a different fan selection that always remains where you had previously set it for the AC.
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Old 11-03-2021, 08:19 AM   #10
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Thanks. I never paid any attention so Iím not really sure Do you think the 90 degree air is correct? The exhaust air is 200f plus when the furnace is running. Would be nice to capture some of that
Yes, that seems more inline with what the furnace should initially produce, especially through cold ducts. It should warm up a bit as it runs and the ducts warm, intake air is warmer, etc.
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Old 11-03-2021, 09:36 AM   #11
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Thank you. The problem was in the BMPro software. When I updated the software the screen changed and was able to shut off a/c fan. Looks like the furnace has a fighting chance to warm it up now. Thanks to everyone for the inputs. Really appreciate everyone helping out the new guy.
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Old 11-11-2021, 06:43 AM   #12
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As stated above, I too have the BMpro system. Mine was updated at the dealers, so I had no issues with turning off the A/C fan. I do it on the app on my phone, which I use for just about everything, as I'm LAZY!!!!! I was told by the dealer that this is an extra way for the warm air to circulate through the RV, as it kicks on about 30 seconds after the furnace has already fired. The only issue I had was with the auto leveling only working with the app. About 6 months into ownership, the app requested an update again, and now the auto leveling works at the panel down in the basement as well. For all of the faults we've been hearing about with this system, I still like it alot.
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Old 11-11-2021, 11:15 AM   #13
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As stated above, I too have the BMpro system. Mine was updated at the dealers, so I had no issues with turning off the A/C fan. I do it on the app on my phone, which I use for just about everything, as I'm LAZY!!!!! I was told by the dealer that this is an extra way for the warm air to circulate through the RV, as it kicks on about 30 seconds after the furnace has already fired. The only issue I had was with the auto leveling only working with the app. About 6 months into ownership, the app requested an update again, and now the auto leveling works at the panel down in the basement as well. For all of the faults we've been hearing about with this system, I still like it alot.
When I updated the software last week the auto level started working from the keypad down below, however hitch height and retract all still don’t work. Taking to dealer in early December with list of items to fix I’ll update if they are able to give me an answer on resolution.
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Old 11-11-2021, 06:27 PM   #14
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DO you have a roof top HEAT PUMP? (My MH) LP furnace ONLY blows at low wall outlets, and Cooling AIR ONLY at ceiling? If no Heat Pump, Do you have a bad thermostat kicking on both units, when cooling should be off? If bad thermostat, turn off 20a breaker for air, until you repair? The 90-deg heat temp will warm up as trailer temp comes up.
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