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Old 05-08-2015, 06:20 AM   #1
Junior Member
Join Date: May 2014
Posts: 5
water heater

04 dolphin no hot water when using 115V works fine with the gas. No power to the heating element but power to the relay, the relay ground is good but there is no power on the yellow wire which I think should be 12 volts to close the relay circuit, any ideas.

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Old 05-08-2015, 06:45 AM   #2
DartmanK's Avatar
Monaco Owners Club
Join Date: Dec 2012
Location: Hill Country Cottage & RV Park New Braunfels, TX.
Posts: 37

What type of water heater?

Atwood is notorious for the ground wire/screw (connected to the exhaust flume) coming loose or rusted and losing continuity. If tight, loosen and clean before reinstall. I also had either the thermostat or ECU go bad on mine - cutting power to the heating element. Usually a $10 - 15 purchase and easy to install. Try replacing if the ground didn't remedy. Also check the thermo-fuse before replacing the board and/or the heating element. Note: the 110V thermostat/ECU are usually on the back side of the tank!

Suburban units a little different in that the thermostat and ECU are resettable. Push the button under the rubber cover to ensure they haven't tripped. The features of the thermostat and ECU are the same on both units - if bad they cut the power to the heat element.

Good luck!

Ken Himes
NRVIA Certified RV Inspector #523
2003 Monaco LaPalma 36DBD -
2013 Honda Fit
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Old 05-08-2015, 06:53 AM   #3
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Join Date: May 2014
Posts: 5
water heater

It is an atwood the ground is tight but I will remove it and clean it up and see what happens thanks for the help
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heat, heater, water, water heater

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