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09-19-2019, 05:55 PM
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#1
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Member
Join Date: Jul 2019
Posts: 48
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Water heater
I just bought a 2004 Monaco diplomat. low miles 19000m looks new. but, I have problem with the hot water heater exhaust turning the outside of the RV black and soot from exhaust extending up estimated 18 inches. checked for blockage and found nothing. anyone experienced this or can point me in the right direction.this problem exists only from propane useage. thanks,greg!
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09-19-2019, 06:24 PM
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#2
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Senior Member
Thor Owners Club
Join Date: Oct 2018
Location: Virginia
Posts: 653
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Dirty orifice, unadjusted air fuel mixture sleeve. Time for service.
__________________
2021 Grand Design Reflection 303rls
2019 ram 2500 crew cab 6.4l hemi.
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09-19-2019, 06:39 PM
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#3
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Senior Member
Join Date: Mar 2019
Location: Lansing MI
Posts: 2,825
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Black smoke is caused by a rich condition, too much fuel, or more likely here, not enough air. While the air baffle could have moved this is not too likely as they are generally held in place with a screw. A much more likely scenario is an obstruction in the air intake, wasp/hornet's nets, bird/mouse nest etc. Find out where the intake to the water heater (probably a panel on the outside of the coach) and open it. Be ready to run in case you disturb a hornet's nest. The culprit is likely obvious. Insects are least active on cool mornings. Good luck.
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09-19-2019, 06:50 PM
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#4
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Senior Member
Join Date: Mar 2019
Location: Braidwood Il.
Posts: 8,300
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Spiders are attracted to propane and build webs in mix tube as well.
__________________
95 Monaco Crown Royale
M11 400hp, 4060 trans.
Aquahot, Generac Guardian7.5k
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09-19-2019, 07:28 PM
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#5
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Senior Member
Monaco Owners Club
Join Date: Jun 2012
Location: South Weber, UT
Posts: 126
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Have somebody turn it on while you watch the heater with the door open; have them ready to turn it off at your signal. I also expect that you have a spider nest in the gas feed tube. I almost burnt down a pickup camper with a spider nest in the tube 
__________________
2005 Monaco Cayman 36PDQ
Toads: 2018 Equinox, 2008 HHR or 1993 S10 with ATV in bed
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09-20-2019, 11:16 AM
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#6
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Senior Member/RVM #90
Monaco Owners Club
Join Date: Nov 2002
Location: Columbus, MS
Posts: 54,745
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Hi ! Welcome to IRV2! We're sure glad you joined the gang! 
I can't add to what others have suggested. Noticed you are kinda new on IRV2 and wanted to say hello! Have fun and keep her between the ditches!
Good luck, happy trails, and God bless!  
__________________
Joe & Annette
Sometimes I sits and thinks, sometimes I just sits.....
2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
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09-20-2019, 09:45 PM
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#7
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Member
Join Date: Jul 2019
Posts: 48
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thanks for all the tips and suggestions and the welcome!!will check for obstructions again. hopeful that is all it is. thanks,guys!
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09-22-2019, 08:01 PM
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#8
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Member
Join Date: Jul 2019
Posts: 48
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update, the feed tube had something inside. works as it should,now! thanks guys!!
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09-22-2019, 10:31 PM
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#9
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Senior Member
Monaco Owners Club
Join Date: Jun 2012
Location: South Weber, UT
Posts: 126
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__________________
2005 Monaco Cayman 36PDQ
Toads: 2018 Equinox, 2008 HHR or 1993 S10 with ATV in bed
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09-22-2019, 10:46 PM
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#10
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Senior Member
Join Date: Dec 1969
Posts: 2,654
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Ditto on the spider web.
In my case some wiring was damaged along with the thermal cutout.
I fixed it check for obstruction. Still had the same problem. After more trouble shooting I started over. This time I really cleaned the tube and then it worked fine.
__________________
Kit & Rita (in memory)
37 foot ‘98 HolidayRambler Endeavor diesel pusher
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09-23-2019, 08:23 AM
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#11
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Senior Member
Monaco Owners Club
Join Date: Jun 2012
Location: South Weber, UT
Posts: 126
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When it happened to our camper, the thermal fuse was not there and it burnt all the coating off the wires  The feed tube was 100% blocked and the flame came from the air mixture adjustment area. If the thermal fuse is in place, it should open the circuit before the wall starts on fire.
I think the previous owner may have had a flame problem and never replaced the fuse afterwards. Or the heater never had one from the factory 
__________________
2005 Monaco Cayman 36PDQ
Toads: 2018 Equinox, 2008 HHR or 1993 S10 with ATV in bed
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