Question about RTO Atwood Water Heater - 6 Gal LP

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I have a 6 gal. atwood water heater and it seems to blow the thermal coupler and won't light or start gas to light up

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  • Curtis Aitken Jun 03, 2010

    Most water heaters have what is called an eco switch in the thermostat.Yours might have opened because it's faulty or because the thermostat is bad.The ECO is a back up thermostat that prevents the water heater from over heating and pooping the relief valve.The ECO prevents the pilot from staying on thus protecting the heater.

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  • 6,674 Answers

Sometimes a simple cleaning can get you up and running again. Undo the fitting at the gas valve and carefully (make sure you don't "Kink" the line) remove it from gas valve, and clean the end that makes contact inside the gas valve with fine steel wool. then spray WD-40 or similar inside hole it came out of, and also roll up a piece of that steel wool small enough and long enough to insert in that hole and spin it to clean surface in there as well, and blow out after with compressed air if you can. If you pull straight out on probe end by burner, (grab base with pair of pliers where it's in holder ) you can also clean it good with steel wool and push it back in to position as well when done. Do not "kink" any of it. If that doesn't help, you may need a new one, but if you recently replaced it and are still having trouble lighting water heater, you may end up having to replace gas control.

Posted on Jun 03, 2010

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1 Answer

Pilot light will not stay lit. already replaced thermal coupler. 6 gallon


A thermocouple makes 30MV power by a temperature differential across the end of the thermocouple, many times people set the entire end inthe flame heating the entire end thus dropping out the power, you cannot bake them into working there must be a temperature differential from the base to tip about a 1.5 inch section. It wil not work correctly if the entire end is hot.

Otherwise the gas valve is bad.

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I am looking for a troubleshooting procedure for an Atwood G6a-8E RV water heater. Unit has electronic ignition and does not want to ignite.


Very simple, do you have a 12 volt light tester, or multimeter?
First thing to try is to remove the thermal cut-off from circuit and try it. That's the little diode like thing inside the plastic sleeve below pressure relief valve. Remove it from the circuit and hook female spade from end, directly to thermostat where other end was before. If that does it, replace thermal cut-off.
If not, start testing for 12 volts when trying to ignite, from one side of thermostat, then over to ECO, or just go directly to gas control connection. If 12 volts getting to gas control, thermostat and ECO are o.k.
Are you getting spark at electrode?

Aug 27, 2011 | RTO Atwood Water Heater - 6 Gal LP

1 Answer

I have a atwood model g6a-7 hot water heater, when you light pilot and after holding knob you turn to light burner the pilot goes out, i have replaced the jade pilot or thermal coupler with no help to the...


Sounds like it. Before replacing gas control, try removing thermocouple connection at valve and spray electrical cleaner in there and blow out with compressed air after, being careful not to get it in your eyes. If no electrical cleaner, try WD-40 and blow out after. If you twist up a piece of fine steel wool and insert in there as well and try to spin/twist it to clean contact inside may help as well. Blow out goo after and re-install fitting and try again. If that doesn"t work, replace gas control.
P.S. Highly recommend certified experienced tech perform this control valve replacement if necessary.

May 22, 2011 | RTO Atwood Water Heater - 6 Gal LP

1 Answer

I hav an attwood g6a-7, replaced the thermal-coupler and stil the pilot light will go out as soon as i release the knob. been running it for weeks, shutin it down on weekends when i go home, then...


Try removing the thermocouple where it attaches to gas control, and spray a little WD-40 in the hole, then spin a rolled up small piece of steel wool in the hole as well, then blow it out with compressed air if you can. Then reconnect thermocouple. Make sure thermocouple tip is getting good flame under it, and if that doesn't cure it, then it's time to replace gas control.

Jun 23, 2010 | RTO Atwood Water Heater - 6 Gal LP

1 Answer

I have an Atwood 6gal hot water heater with a 37c14u-5 controller. The pilot light will not stay lit. I have replaced the thermal coupler twice and the pilot tube with orfice once. It's still not...


Try removing the thermocouple where it attaches to gas control, and spray a little WD-40 in the hole, then spin a rolled up small piece of steel wool in the hole as well, then blow it out with compressed air if you can. Then reconnect thermocouple. Make sure thermocouple tip is getting good flame under it, and if that doesn't cure it, then it's time to replace gas control.

Jun 23, 2010 | RTO Atwood Water Heater - 6 Gal LP

1 Answer

I replace my thermal coupling. burner doesn't ignite


is the burner assembly sitting pronperly on it;s cradle,, this will put it at just the right distance for it to ignite,,

Jun 15, 2009 | RTO Atwood Water Heater - 6 Gal LP

1 Answer

10 gal. atwood water heater in 1994 Prowler-Park model.After the water is heated, the pilot light goes out and has to be re-lit. this happens every time. Lately, put on pilot, re-light, turn to on and will...


the gas valve is what you need to replace, the thermocoupling only tells the gas valve that it is ready for a flame and lets a little gas out, but the gas valve is not letting the gas out,, there is a screen in the gas valve it may be clogged not letting the gas thru, but at the age of your unit I would even consider changing the unit insted of investinf more money into this one

Jun 14, 2009 | RTO Atwood Water Heater - 6 Gal LP

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