Question about RTO Atwood DSI-RV Water Heater-6 Gallon

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My atwood water heater has spark and will light

My atwood water heater has spark and lights but goes to lock out. It seems that the computer is not sensing flame. I have cleaned all ground connections and changed ingnitor and gas valve last year.

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If you see a little short round (cut-out)diode-like piece inside a clear plastic sleeve that runs from wiring to thermostat terminal,(usually right under pressure relief valve) remove it from the thermostat terminal, as well as wiring from heater (take it right out of the circuit) and connect that wire directly to the spade connector where it was attached at thermostat, and now try it. They are a one shot cut-out, and if it went, no power gets to the system and by removing it, you will see if it's the problem or not. They are a safety device that if for some reason you get too large of a flame from water heater, and it feels the flame/heat, it blows and cuts off power. Should be replaced when you get a chance, but at least you'll know what the problem is. Let me know if that works please.

Posted on Jul 22, 2010

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1 Answer

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Remove the wires at both ends of the thermal cut-off that is located in the little plastic sleeve below the pressure relief valve area and it's connected to spade connector on thermostat disc. Once removed, connect the female spade from wire to male spade on thermostat disc, and try to light now. If all's o.k. replace thermal cut-off as it is a safety feature to protect in case of flame up.
If not, get back to me.

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1 Answer

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I have an Atwood water heater model G6A-8E. When


If this model has a thremo couple you might want to check it. It sounds like that is the problem.

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2 Answers

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I am having the same problem. Is your water heater a power vent?

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