SunflyerA
Andover, Minnesota USA
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Joined: 01/08/2004
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I just installed my second igniter board on my Atwood furnace. I had a dealer repair my furnace last year (they are now out of business) and the problem was the circuit board. The furnace didn't work last weekend so I took out the board to have a look and noticed the back side was totally corroded. The Furnace is mounted under the bathroom sink and the circuit board is open and exposed to what ever may fall down...like any little drips of water that could fall off the sink or plumbing. My new board arrived today and everything works....I fashioned a protective cover for the top of the circuit board so I hope this is the last one for a while.....anyone who has the 39S might want to check their furnace...you might be able to avert a problem down the road.
sunflyer
2005 Fleetwood Excursion 39S
350 Cat
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Blackdiamond
So. Cal
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Joined: 06/10/2005
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Thanks, I will, I haven't even fired it up yet but with the cold season coming I know I will use it alot.
07 Fleetwood Discovery 39S
07 Weekend Warrior SX1800
05 525 EXC
04 LTZ-250 and 04 CRF 230 for the wife, almost quad free!
04 TTR 90
03 XR 80
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javaseuf
California's Gold Coast
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Joined: 03/30/2005
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I think the real issue would be why there is any moisture getting below the sink.
If the counter is sealed to the wall/back-splash and the plumbing is sealed properly, there should be no water breeching the furnace.
Steve
2007 Springdale 291RKL
2003 F150 King Ranch
2001 Dodge Van w/Wheelchair Ramp
1991 Palomino Mustang PUP
Eureka Timberline Tent
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"Politically Incorrect And Proud Of It" 
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SunflyerA
Andover, Minnesota USA
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It wouldn't take much....some adults and children can splash pretty good so any slight leak could be a problem....there is also a condensation possibility.....the amount on the circuit board was not very much, but then it didn't take much to render it useless.
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itsalleasy
USA
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Joined: 07/20/2007
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SunflyerA wrote:The Furnace is mounted under the bathroom sink and the circuit board is open and exposed to what ever may fall down...like any little drips of water that could fall off the sink or plumbing.
Isn't there a cover on the furnace protecting the board (and controlling the air flow)? I guess I don't understand how any little drips can get to the board.
javaseuf wrote:I think the real issue would be why there is any moisture getting below the sink.
If the counter is sealed to the wall/back-splash and the plumbing is sealed properly, there should be no water breeching the furnace.
My concern also. You shouldn't have ANY water from the sink inside the vanity. If there is enough getting in to destroy 2 boards I think it is more than an occasional drip.
Conformal coating is used on circuit boards to seal them. It will protect the board but I think you would be better off finding out where the water is coming from.
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SunflyerA
Andover, Minnesota USA
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Joined: 01/08/2004
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itsalleasy wrote:SunflyerA wrote:The Furnace is mounted under the bathroom sink and the circuit board is open and exposed to what ever may fall down...like any little drips of water that could fall off the sink or plumbing.
Isn't there a cover on the furnace protecting the board (and controlling the air flow)? I guess I don't understand how any little drips can get to the board.
javaseuf wrote:I think the real issue would be why there is any moisture getting below the sink.
If the counter is sealed to the wall/back-splash and the plumbing is sealed properly, there should be no water breeching the furnace.
My concern also. You shouldn't have ANY water from the sink inside the vanity. If there is enough getting in to destroy 2 boards I think it is more than an occasional drip.
The board is not covered by anything and have no protection what so ever....the amount of water was obviously very small...maybe a cover was omitted and others will not have the same problem but it didn't look like it.....I'm not worried about the source of the water, when I remodel this winter I will dismantle and reseal but if others have the same set up I do; prudence requires some action to be taken to protect a hundred dollar circuit board.
Conformal coating is used on circuit boards to seal them. It will protect the board but I think you would be better off finding out where the water is coming from.
I don't know what conformal coating is, but my board looks like any other I've seen and corroded from what appears to be a few drops of water.... had the same issue up front where condensation from air conditioning ruined the automatic locks board.....225.00 from Fleetwood ....had to relocate the unit to avoid the problem again.
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itsalleasy
USA
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Joined: 07/20/2007
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Conformal coating. It is used on circuit boards to protect them, most often in high humidity or dirty areas, military. It's usually done in the factory as a dip but you can buy spray cans, it looks like clear paint when applied.
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