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08-28-2010, 02:40 PM
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#1
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Junior Member
Join Date: Jun 2009
Posts: 5
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Heater sets off Carbon Monoxide Alarm
I have pulled the burner and fan assy out of the box. There are no visible blockages like wasp nest or dirt dobber nest's that I can see. I cant find any cracks, but I have not taken it all apart. What to look for, what to do? Any help will be greatly appreciated!! Wilson & Cathy
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08-28-2010, 04:44 PM
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#2
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Junior Member
Join Date: Jun 2010
Location: Concord NC
Posts: 24
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You might want to check the CO monitor. Never can tell.
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08-28-2010, 05:06 PM
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#3
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Moderator Emeritus
Ford Super Duty Owner
Join Date: Aug 2000
Location: Bryan, TX when not traveling.
Posts: 22,948
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How old is the rig. CO alarms should be replaced every 5 years.
Ken
__________________
Amateur Radio Operator (KE5DFR)|No Longer Full-Time! - 2023 Cougar 22MLS toted by 2022 F150, 3.5L EcoBoost Tow Max FX4 Lariat Travel with one Standard Schnauzer and one small Timneh African Gray Parrot, retired mechanical engineer
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08-28-2010, 08:34 PM
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#4
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Moderator Emeritus
Nor'easters Club Workhorse Chassis Owner iRV2 No Limits Club
Join Date: Oct 2004
Posts: 30,785
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84 Chieftain, with the furnace out check all around the burner tubes for rust, holes in tube or splits in tubes. They have replacements but you may want to invest in new furnace.
Could be your detector also.
Welcome to irv2.
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08-28-2010, 09:53 PM
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#5
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Senior Member
Join Date: Apr 2010
Posts: 691
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IMO even if the detector is outdated then the fact it alarms when the furnace is operating means that combustion fumes are leaking in somewhere and furnace is suspect
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08-29-2010, 10:04 AM
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#6
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Junior Member
Join Date: Jun 2009
Posts: 5
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so you gus think the co monitor just wenyt off after I turned the heater on? It has never gone of before or after the heater was turned on I doubt that it is the monitor.
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08-29-2010, 10:36 AM
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#7
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Senior Member
Newmar Owners Club Nor'easters Club Appalachian Campers Ford Super Duty Owner Coastal Campers
Join Date: Dec 2007
Posts: 2,463
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Even if it is a bad monitor, CO is nothing to be trifled with. One of my bosses had an interesting story: When he was a kid, his family had a cottage in the 1000 Islands area of NY. One night his dad woke them up and got them out of the cottage fast. The next morning they all had terrible headaches. It turns out the gas heater they used was malfunctioning. He said they were lucky to get out alive. To this day he does not know why his dad woke up and noticed the problem, but he's glad he did!
You can relatively easily replace your CO monitor if you suspect it is bad, you can buy a good one with a display for about $30-$50 and know exactly how much CO is in your RV. We bought one with a display to use along with the one the RV mfr provided as I am very sensitive to CO and get headaches after very little exposure.
Stewart
__________________
Stewart, Brenda and kids
2008 Newmar Canyon Star 3410, now at a new home
2006 Roadtrek Versatile 210
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08-29-2010, 10:53 AM
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#8
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Senior Member
Damon Owners Club Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 24,024
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I see three possible methods for CO to enter from the heater, Which by the way should not be producing much CO
1: Cracks, smaller than you can see, in the heat exchanger.. This is the most common path.
2: Bad CO detector.. This (Technically) is not the problem.. My CO Detector started doing the "internal failure" Beep.. Pause.... Beep... Pause.....Beep thing last winter. Had to replace it.. Resetting did not fix it
To check for this reset it, if it alarms again in less than 2 minutes.. You have a CO problem.. If not an alarm problem
Clean and adjust your burner too.. Propane if properly burned burns very clean.
3: Blow back from the furnace exhaust.. Can happen under some conditions. The only cure I know of is to park facing the other way so it blows forward instead of back (Forward being away from your rig)
__________________
Home is where I park it!
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09-02-2010, 07:32 AM
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#9
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Junior Member
Join Date: Jun 2009
Posts: 5
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CO problem found
So I pulled the burner bars out of the can and they were covered with dirt dobber mud. Also the gasket at the electrode is torn.
problem solved!!!
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09-02-2010, 02:42 PM
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#10
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Moderator Emeritus
Nor'easters Club Workhorse Chassis Owner iRV2 No Limits Club
Join Date: Oct 2004
Posts: 30,785
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Thanks for the follow up jwjetco it always good to know. 
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