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08-19-2018, 07:31 AM
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#1
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Junior Member
Join Date: Jun 2009
Posts: 29
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Suburban SW6DE won't stay lit
I replaced the entire water heater in our Alpine 2 years ago. Direct fit, easy change and it worked well on gas or electric for the first year. Last year, it continued to work well on electric, but refused to stay lit when switched on. It will cycle several times with the solenoid opening, light the main burner and go out within a few seconds.
While it still works well on 110, it would be great to have gas operation too. Football season starting soon! Any recommendations?
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Tim and Sue Stoops
Brooksville, FL - Go Gators!
'99 Alpine Coach 36MDSS
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08-19-2018, 07:40 AM
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#2
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Senior Member
Winnebago Owners Club
Join Date: Mar 2017
Location: Mico TX
Posts: 260
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The obvious answer would be to check propane but I am sure you already have done that... the burner has a little nozzle hole and you may want to ensure it isn't clogged and no insects have made a home behind the shroud that covers it.
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wiredgeorge Mico TX
2006 F-350 Crewcab 4wd LWB 6.0L
2002 Keystone Cougar 278EFS
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08-19-2018, 08:55 AM
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#3
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Junior Member
Join Date: Jun 2009
Posts: 29
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Thanks George, the propane supply and nozzle are fine. No critters either. It clicks, the ignitor fires it up, and it goes right back out. 3 or 4 cycles and then the light inside the coach comes on (meaning it's not on).
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Tim and Sue Stoops
Brooksville, FL - Go Gators!
'99 Alpine Coach 36MDSS
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08-19-2018, 03:52 PM
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#4
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Senior Member
Join Date: Sep 2016
Location: Sarasota, FL
Posts: 5,228
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Try lighting the stove - maybe all three burners to make sure you have good flow and leave it on while you try to light the water heater. If the stove lights and the W/H doesn't, you've localized the problem. From what I've read, there is a control board in them that senses the flame to make sure it is lit and the "spark generator" you hear stops.
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Rick and Larrie Dee
1997 40' Newmar London Aire DP CTA 8.3 (Mechanical) 325 Spartan MM
Bringing her back to her glory.
'08 Jeep GC Overland.
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08-19-2018, 06:52 PM
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#5
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Member
Join Date: May 2012
Posts: 91
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Just went thru this with my Suburban WH. Mine was doing exactly what yours is doing. Mine would also keep "clicking" during the process...like it was still trying to light the flame even tho it was lit for a few seconds before shutting down. Three trys and it would lock out. First I replaced the ignitor/flame sensor....no change. Next was a new Dinosaur Board...that did the trick. So you can start cheap like me, but it sounds like your board is bad.
Jaye (Mn)
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Jaye & Cindy Frets
Pine City, Mn.
2007 Georgetown 349TS XL, v10 w/5 Star Tune
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08-19-2018, 10:39 PM
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#6
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Senior Member
Join Date: Nov 2015
Posts: 26,820
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Flame Proving FAILURE
DC is sent to gas solenoids for 6-8 seconds WHILE the high voltage transformer on circuit bd is energized sending 2000V to spark electrode which ignites the propane.
THEN flame MUST prove it lit for DC to remain on gas valve solenoids.
Flame creates a 'electrical current' that circuit bd uses to prove flame lit.
IF that millamp signal is not received then circuit bd drops DC to gas valve solenoids so raw fuel doesn't accumulate
SW6DE uses the electrode/high tension wire as return path.
ANY corrosion/dirty/loose connections will stop that milliamp signal
First place to start is with spark electrode assembly/wire connections
Could be circuit bd issue but then again just removing/reinstalling connections might work for free.
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I took my Medication today. HAVE YOU?
Dodge 3500 w/Tractor Motor
US NAVY---USS Decatur DDG-31
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08-19-2018, 11:04 PM
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#7
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Senior Member
Join Date: Feb 2017
Location: Denver, CO
Posts: 1,527
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I think others have said this but it’s likely the DSI module. It’s a known problem part and isn’t covered in the 2 year warranty, only the first year. Mine went bad at day 380..... It’s about an $80 part and is easy to replace if you have access to it from inside your coach.
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09-04-2018, 07:41 PM
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#8
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Junior Member
Join Date: Jun 2009
Posts: 29
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Thanks guys, I’m going to check it out this week. I spent the last couple days dealing with an overheating generator (now fixed!)
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Tim and Sue Stoops
Brooksville, FL - Go Gators!
'99 Alpine Coach 36MDSS
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09-05-2018, 07:42 PM
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#9
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Junior Member
Join Date: Jun 2009
Posts: 29
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I cleaned all the connectors and the thermocouple was in the middle of the flame. After switching on inside, the main burner still comes on once for 3-5 seconds, while the igniter continues to spark. The burner then shuts off and the light inside the coach comes on. From what I’ve heard, this sounds like a circuit board problem. For the record, we still have 110v element action.
__________________
Tim and Sue Stoops
Brooksville, FL - Go Gators!
'99 Alpine Coach 36MDSS
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09-10-2018, 06:47 PM
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#10
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Junior Member
Join Date: Jun 2009
Posts: 29
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No surprise here. We ordered and installed a new board from Suburban (with a 2-year Amazon warranty) and the heater worked perfectly. Now on to the next repair.......
Thanks for the input guys!
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Tim and Sue Stoops
Brooksville, FL - Go Gators!
'99 Alpine Coach 36MDSS
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09-11-2018, 09:00 AM
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#11
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Senior Member
Join Date: Sep 2016
Location: Sarasota, FL
Posts: 5,228
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Glad you figured it out.
__________________
Rick and Larrie Dee
1997 40' Newmar London Aire DP CTA 8.3 (Mechanical) 325 Spartan MM
Bringing her back to her glory.
'08 Jeep GC Overland.
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