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11-30-2021, 04:14 PM
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#1
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3 Rivet Member 
2021 27' Globetrotter
Rochester
, New York
Join Date: Jan 2021
Posts: 163
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Ridiculous furnace issue
I'd always thought that way too much heat came out near the galley floor and not enough from the bed/bath heater vents. So I managed to get my phone inside the compartment where the furnace is and took the attached picture.
To my surprise, it appears that when my furnace was installed, someone removed the center knock-out and never replaced it so nearly ALL of the heat is escaping before it ever gets to the ducts. I have no idea what the duct tape was for. Crazy poor quality.
I talked to a very helpful tech at Airstream today who confirmed that is clearly an error on their part. Fortunately Dometic sells cover plates and I'll be able to fix this before our winter trip.
Anyone have any tips for removing the interior wood structure around the furnace so that I can access the hole?
There is also a chance that the knock-out fell inside the furnace so I'll have to see if I can get look inside. Maybe the duct tape was holding it on?
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11-30-2021, 04:54 PM
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#2
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Site Team
2007 30' Classic S/O
Somewhere
, South Carolina
Join Date: Apr 2010
Posts: 6,436
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Good research on finding this. Sorry can’t help with access issue.
__________________
S/OS #001 2005 Dodge Ram 2500 5.9L 6 Speed
16" Michelins, Hi Spec Wheels, Max Brake, Dexter 4 Piston Disc Brakes, Carslile Actuator, Equal-I-Zer, Dill TPMS. Campfire cook. BMV-712. DEMCO 21K Lb Cast Iron coupler
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11-30-2021, 05:11 PM
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#3
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diesel maniac
Airstream - Other
Tucson
, AZ
Join Date: May 2017
Posts: 2,548
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I believe the entire furnace slides out of the sheet metal plenum and you can patch it by reaching into the plenum from outside once the furnace is out of the way.
I could be wrong on that, I saw a newer furnace on You Tube that had the duct holes as part of the unit and looked a lot like yours, on that one you have to be able to twist and unlatch the ducts to slide out.
__________________
Brian
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12-03-2021, 06:37 AM
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#4
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3 Rivet Member
2021 27' Globetrotter
Rochester
, New York
Join Date: Jan 2021
Posts: 163
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Used my endoscope/inspection camera to look inside the furnace opening and, sure enough, the knock-out was inside the furnace. Took some effort but I was able to fish it out. Access to the front of the furnace was pretty simple - just had to remove the four screws holding the small panel just in front of the unit near the floor.
The furnace runs MUCH quieter now without that piece of metal rattling around inside of it.
I contacted Dometic and they are sending me a no-cost duct cover plate.
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12-03-2021, 06:42 AM
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#5
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Site Team
2009 25' FB International
2018 27' Globetrotter
Tavares
, Florida
Join Date: Mar 2014
Posts: 3,725
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Thanks for the update!
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12-03-2021, 06:42 AM
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#6
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Site Team
2007 30' Classic S/O
Somewhere
, South Carolina
Join Date: Apr 2010
Posts: 6,436
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Well done.
__________________
S/OS #001 2005 Dodge Ram 2500 5.9L 6 Speed
16" Michelins, Hi Spec Wheels, Max Brake, Dexter 4 Piston Disc Brakes, Carslile Actuator, Equal-I-Zer, Dill TPMS. Campfire cook. BMV-712. DEMCO 21K Lb Cast Iron coupler
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12-03-2021, 10:31 PM
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#7
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Rivet Master 
2016 30' International
redondo beach
, California
Join Date: Feb 2017
Posts: 772
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"Used my endoscope/inspection camera "
What kind of camera do you use?
__________________
Randy and Beth 15 F250, 16 30' International, ProPride, Dexter 3" lift, Michelin 16, Dill TPMS, Centramatics, Battleborn x4, Victron BMV and 1.2KW inverter, Orion DC/DC, BlueSolar MPPT, 300W solar, Alpine iLX, Polk MM1, Samsung smart 42"
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12-04-2021, 05:12 AM
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#8
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3 Rivet Member
2021 27' Globetrotter
Rochester
, New York
Join Date: Jan 2021
Posts: 163
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