Suburban sw6d water heater won't stay lit

[CdnCruiser]

Have 2004 suburban SW6D water heater in our MH. When I turn on the switch inside the igniter sparks and the gas ignites. But as soon as the igniter stops the heater goes off about 5 seconds later tries again and once again when the spark igniter stops it goes out. I have tried many times and the heater just won't stay.

Looking for anyone who has had a similar issue how to fix it. Hopefully it it is a simple remody.

[marcham]

The burner or the pilot will not stay lit?

How far did you get troubleshooting with the service manual?

http://dutchmen.com/image/data/docum...ice_Manual.pdf

[jesilvas]

There is no pilot if this is actually an SW6D. That is a DSI ignitor.

Either it is the ignitor/flame sensor, wire, or the board not sensing correctly. Make sure the connection on the ignitor is good.

[marcham]

From the service manual, this fault most likely points to a faulty thermocouple.

[GASMAN6674]

Dirty, out of posistion or bad flame sensor or bad control module. When unit sparks and then lights its still sending a small current using the flame to complete the circuit, its called flame rectification. If the flame rod gets loaded up with junk it cant sense. I would clean it first and make sure it is posistioned correctly, if that does not fix it I would replace the flame rod (least expensive) If no joy then get a new module.

Good Luck
Hopefully its dirt

[CdnCruiser]

Turned out to be the board. Replaced and it fires up like new. Thanks for all the great ideas.

[GASMAN6674]

Good glad you were able to fix it