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Atwood hot water heater

I have the original Atwood hot water heater in my 02 holiday rambler vacationer. Electric works great. Gas side lights right up but only gets lukewarm. I can visually see the flame. Water valves have not been moved in the 8 years that I have owned it. I'm stumped....Thanks in advance.

Nomad II
Nomad II
Can you post the model number of your water heater and the rev number?

Do you get a DSI fault on the inside panel when on gas?

A 2002 Atwood heater would have a separate T stat for the electric and the gas burner side. It may be that the gas side T stat is not working correctly. Opens up too soon.

Does the gas burner shut off or run constantly, just the water does not get hot as the electric side does?

How long did the gas burner run from an overnight cool down of the water heater? 20 minutes, 40 minutes, etc

Another thing, on a 2002 Atwood with both gas and electric, the electric side and the gas side both have their own ECO (emergency cut-off) switch. The ECO is supposed to open up in the 180 F range. The gas T stat is supposed to open at 140 F range, and if the gas ECO opens up lower than 140 F as it has a problem, then the water will not get to temp as it is overriding the gas T stat.

Need more info to go on.
2005 Ford F350 Super Duty, 4x4; 6.8L V10 with 4.10 RA, 21,000 GCWR, 11,000 GVWR, upgraded 2 1/2" Towbeast Receiver. Hitched with a 1,700# Reese HP WD, HP Dual Cam to a 2004 Sunline Solaris T310R travel trailer.

Done 🙂

Notified moderators to move post to the correct section.
Dan- Firefighter, Retired:C, Shawn- Musician/Entrepreneur:W, Zoe- Faithful Golden Retriever(RIP:(), 2014 Ford F150 3.5 EcoboostMax Tow pkg, 2016 PrimeTime TracerAIR 255 w/4pt Equalizer and 5 Mtn. bikes and 2 Road bikes

Explorer II
Explorer II
When was the last time you serviced the water heater? As above, clean out the burner tube, check the flame for proper burn - blue flame not yellow.
Tom Wilds
Blythewood, SC
2016 Newmar Baystar Sport 3004
2015 Jeep Wrangler 2dr HT

Nomad II
Nomad II
Clean out the cobwebs in the tube where you see the flame. Compressed air works nicely.

Another possibility is the jet is partly clogged.

I'm sure there are other potential failure points.
Regards, Don
My ride is a 28 foot Class C, 256 watts solar, 556 amp-hours of Telcom jars, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.