Good Sam Club Open Roads Forum: Need help, hot water tank fail.
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 > Need help, hot water tank fail.

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OBX-GL

Ontario

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Posted: 08/02/21 04:00pm Link  |  Quote  |  Print  |  Notify Moderator

Ok, so DW wants hot water while off grid. Unreasonable right ? [emoticon]

Hot water tank works on shore power, but only kinda on DC.

Basically it cycles ignitor/clicks normally. It fires fully on very very first ignition click, full flame stays on as long as ignition clicking keeps it going. Issue is, it goes out with the end of ignition cycle. Again back on first click for remaining two cycles till system times out. I'll turn off/on the switch and the same symptom persists again for that cycle.

Not sure of the brand of unit. I have vacuumed out what i can, no change. Seems to be very little to adjust, or clean, or take apart. I don't even see an adjustment on the tube to alter fuel/air mixture.

I'm the original owner. It did work when last i used the propane option, that was many years ago however.

Please add your thoughts !

- Greg


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toedtoes

California

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Posted: 08/02/21 05:46pm Link  |  Quote  |  Print  |  Notify Moderator

Is everything else working on battery power? If not, then it may be your converter.

Is it a combination heater - has an electric heating element - or just an electric ignition?

If the former, check the thermocoupler and propane lines for leaks.


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enblethen

Moses Lake, WA

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Posted: 08/02/21 05:50pm Link  |  Quote  |  Print  |  Notify Moderator

Make and model of water heater would help.
Check the flame sensor to insure it is in the center of the flame and adjusted correctly.
Your circuit board could be bad! I will wait for make and model!
Propane would run off batteries when not connected to shore power.


Bud
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OBX-GL

Ontario

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Posted: 08/02/21 06:11pm Link  |  Quote  |  Print  |  Notify Moderator

enblethen wrote:

Make and model of water heater would help.
Check the flame sensor to insure it is in the center of the flame and adjusted correctly.
Your circuit board could be bad! I will wait for make and model!
Propane would run off batteries when not connected to shore power.


Checking images, i believe it is a Suburban heater.

My theory - heater doesn't seem to recognize the flame is going. Will it stop the gas in conjunction with the completion of the ignition cycle ? If so, how is it sensed ? I don't see anything in the burner path to identify the flame is burning.

OBX-GL

Ontario

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Posted: 08/02/21 06:15pm Link  |  Quote  |  Print  |  Notify Moderator

toedtoes wrote:

Is everything else working on battery power? If not, then it may be your converter.

Is it a combination heater - has an electric heating element - or just an electric ignition?

If the former, check the thermocoupler and propane lines for leaks.


AC and DC/propane heater. Solid very strong blue flame when running.

Im guessing its a Suburban style heater.

enblethen

Moses Lake, WA

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Posted: 08/02/21 06:19pm Link  |  Quote  |  Print  |  Notify Moderator

Depending on model, the ignitor acts as the flame sensor. If no flame is present, the circuit board shuts off the propane.

wildtoad

Blythewood, SC

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Posted: 08/02/21 06:54pm Link  |  Quote  |  Print  |  Notify Moderator

Sounds like a dual service Suburban. My understanding from the op - works while plugged into 110 and using the 110 heating side. Does not work while using the propane side of the wh. I suspect this is true whether plugged in to 110 or not. Sounds like there is gas at the wh as it burns as long as the igniter is operating. Get a new control board.


Tom Wilds
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enblethen

Moses Lake, WA

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Posted: 08/02/21 07:17pm Link  |  Quote  |  Print  |  Notify Moderator

If it is the circuit board, replace it with a Dinosaur electronics version.

OBX-GL

Ontario

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Posted: 08/02/21 07:57pm Link  |  Quote  |  Print  |  Notify Moderator

enblethen wrote:

Depending on model, the ignitor acts as the flame sensor. If no flame is present, the circuit board shuts off the propane.


Ok, so if the flame is strong but ends with the termination of the ignition cycle ?

im guessing my circuit board is the culprit.

Circuit board must be buried on the tank inside the trailer, which is an impossible place under my kitchen cabinets.

i'll have a look, thx.

enblethen

Moses Lake, WA

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Posted: 08/02/21 08:55pm Link  |  Quote  |  Print  |  Notify Moderator

Your model number should be on frame of water heater on the outside. With model number we can find manual.
Check the spacing of ignitor. Should be around 1/8 inch.

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