My 2008 Classic has an Atwood electronic water heater - automatic ignition is so much easier then lighting the pilot like my older Hi-Lo. My problem is that the flame dies out within 20 seconds after lighting. Everything looks clean and I unplugged the connectors on the circuit board and then reinstalled them after seeing they looked clean as well. What should I consider replacing first?

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I would check the thermocouple connection. If that is not it, replace it. It is a simple fix that is not too expensive.

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Don and Lou
2703 TowLite
'97 Chev Suburban 2500 Diesel
Tennessee/Greenest state in the land of the free
moonstruckblog.wordpress.com

Thanks. Thermocouple was my first guess as well. I'll give it a try.

Might want to also check for critters and webs in any of the tube openings.

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"Ruben"
2404T, 2003 2500HD 4X4 GMC Sierra SLT Crew Cab w/Astro camper shell and 2003 Chevy Tahoe LE 4X2
Far West Texas

Ends up it was the Thermocouple after all. The replacement cost me $43 and was exchanged in less the five minutes.