Question about RTO Atwood Water Heater - 6 Gal LP

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I HAVE A 6 GAL ATWOOD WITH ELECTRONIC IGNITION ,I HAVE CHANGED THE ECO AND TSTATS I HAVE CHECKED THE CONTROL BOARD ( ITS GOOD ) THE GROUND IS GOOD ,IT WILL START AND RUN FOR 1 MIN AND SHUT DOWN CHECKING THE TSTATE IT IS OPEN, WHEN IT CLOSE IT WILL RESTART FOR ABOUT I MIN AGAIN HELP

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  • RTO Master
  • 6,674 Answers

One thing you may want to try, if it has electronic ignition, is to remove the thermal cut-off diode from the circuit temporarily. It's the little diode inside the clear plastic tube, that is connected to your incoming power wire, and connects to thermostat. Simply remove it from the spade connector at the thermostat, and pull it apart at spade connector from incoming power wire, and connect incoming power wire to spade connector on thermostat. If you try to light it now, and all works good, the diode is faulty, and should be replaced.

Posted on May 12, 2010

Testimonial: " I HAVE FOUND A BAYPASS VALVE CLOSED ( NO WATER IN HEATER) NOW I HAVE BAD WATER LEAK TO REPAIR BEFORE I CAN GET WATER IN HEATER .IF IT STILL DOES NOT WORK I WILL CHECK THE DIODE THANKS FOR YOUR HELP"

  • Mike Butler
    Mike Butler May 15, 2010

    One of the easiest ways to check for that before starting up the water heater is to simply open pressure relief valve slightly before, when water is on. At the resort I work at, one of my jobs is to open units up before season starts and check propane system, water system, electrical etc., and make sure all is safe and ready to go for the owner.I don't even turn on the hydro to the unit until I have water heater full, just to be sure whoever winterized it, didn't forget to turn off the power to the heating element in some of the water heaters, and I end up burning out the element. On the RV style water heater, if water shoots out pressure relief valve, I know I'm safe to turn power on without risking burning element.
    No water in heater, certainly could have been your problem. Sorry for not questioning you on that from the start, but I naturally assumed.....? Let me know how it goes.


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Heater has low voltage and will not run


Attach black on meter, or ground clamp on test light to good ground such as cooper line. Test for 12vdc at gas valve when switch turned on and you hear or see ignitor sparking. If no 12vdc, backtrack. Follow red wire from gas valve to (ECO), (both terminals,) then same to thermostat (THERM) . If you get 12vdc on one side, and 6vdc or no voltage on the other, replace it. If you've got 12vdc going to gas valve, and don't feel or hear it "Click" when trying to ignite, try a quick "rap" on valve to see if it's stuck. If valve is opening and you hear gas, but no ignition, clean burner tube good and retry.

Nov 28, 2012 | Atwood Mobile Products Atwood G6A-8E...

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Need to replace G6A-6E Atwood waterheater, what replacement model can I use?


Why not the same model/size? Atwood 6 gal, works on propane with electronic ignition. Or, you can get the 6 gallon with electronic ignition, and electric element as well provided you are willing to run hydro to water heater as well, if not already there. Check any RV parts site for prices and availability. Some places are out of stock currently. I assume your current tank is leaking?

Sep 29, 2012 | RTO Atwood Water Heater - 6 Gal LP

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I have a g6a-6e water heater,it cycles and gets hot then shuts down,and thengoes to the shut down mode.I have replaced the thermo switches and unplugged the fusiable link,restarted and does the same t


Look at front of water heater with cover open. Black rectangular piece of foam under pressure relief valve area, has "therm" and "eco" marked in white letters. Each has 2 male spade connectors sticking out. That is your Thermostat and eco ( emergency cut off) . The ECO basically is a safeguard in case thermostat malfunctions. It is set to shut water heater down, a few degrees hotter than thermostat, just in case. Peel the foam back to expose the Thermostat & ECO, and remove circular retainer to remove either.

Sep 09, 2012 | RTO Atwood Water Heater - 6 Gal LP

1 Answer

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 an atwood gas/elec elec igniton 6 gallon water heater. It lights up normal with a good flame but the valve turns off after about 5 sec. I have jumpered out the thermo cut-off, same prob, I have...


Have you checked for voltage each side of thermostat and ECO ? Make up a short jumper wire ( with 2 male spades) and put it between 2 female spades connected to each of them, (by-passing them) one at a time. (remove from therm, or eco, and use jumper instead) If it fixes it on one or the other, change it. Otherwise I'd try a new electrode/sensor assy, before changing igniter board. Be sure alignment is good for nice hot flame at tip of igniter/sensor assy.

Apr 02, 2011 | RTO Atwood Water Heater - 6 Gal LP

2 Answers

I have an Atwood 6 gallon electronic start water heater in my 1999 Pace Arrow Vision motorhome. The ignition spark does not operate when I try to turn on the heater from the control panel in the RV. I can...


Open following link for Atwood troubleshoot resources to identify product and look at manual with parts lists.
http://waterheatertimer.org/Atwood-water-heater-resources.html

Add a comment to this thread saying how you solved problem to help others who have same issue

Jan 25, 2011 | RTO Atwood Water Heater - 6 Gal LP

1 Answer

HI I HAVE AN ATWOOD WATER HEATER MODEL NUMBER GC6AA-9E AND AS HARD AS I TRY, I CAN NOT GET AN ANWSER FOR THE RIGHT REPLACEMENT MODEL. THERE IS CONFUSEION ON WHAT WILL WORK. YOUR ASSISTENCE WILL BE...


By model number it tells me that you have Electric element, as well as gas with electronic ignition for the gas, is that correct?
Any 6 gallon Atwood will work, and if you want to have all the same features available, you simply order another 6 gal, with same features. If you decide to forget the electric element, and just go with gas and electronic ignition, they should be able to order you just that tank. You can even order a tank with manual ignition, and forget all the other options if you wanted to. Personally, if it's got hydro and electronic ignition for gas, I'd replace it with same, unless I have no access to hydro, and will never use that option. If all those options are working on yours, you can just replace the tank, rather than buy all those items new on a complete tank. Any 6 gal. Atwood will go in the hole, it just depends on what you decide you want. I don't understand what the confusion is about, but maybe I'm missing something here.

Oct 02, 2010 | RTO Atwood Water Heater - 6 Gal LP

1 Answer

Attwood water heater will only light for 30 seconds and goes out


Can you give me your model number off the sticker under outside cover?
Need to know as this will tell me if Manual ignition, or automatic spark, and if just gas operation, or electric element as well.
One thing you may want to try, if it has electronic ignition, is to remove the thermal cut-off diode from the circuit temporarily. It's the little diode inside the clear plastic tube, that is connected to your incoming power wire, and connects to thermostat. Simply remove it from the spade connector at the thermostat, and pull it apart at spade connector from incoming power wire, and connect incoming power wire to spade connector on thermostat. If you try to light it now, and all works good, the diode is faulty, and should be replaced.

May 01, 2010 | RTO Atwood Water Heater - 6 Gal LP

1 Answer

Atwood. Will not light. Red light comes on and stays on.


A GOOD RV DEALER SUCH AS WHERE I WORK HAVE A BOARD TESTER AND CHECK IT FOR FREE. A DEALER NEAR YOU SHOULD BE ABLE TO DO IT FOR YOU AS WELL. THE SENSORS ARE THE ECO AND T-STAT. NO, THEY CAN'T BE BYPASSED. THE ECO AND T-STAT WORK IN CONJUNCTION BY REGULATING THE WATER TEMP AND PROVIDING POWER TO THE CIRCUIT. THEY ACT AS SAFETY DEVICES.

Sep 24, 2009 | RTO Atwood Water Heater - 6 Gal LP

1 Answer

Electronic ignition tries to lite, clicks 5 times, then goes POOF


Gas burners go "poof" when they have too much gas in the area upon lighting. This is normally due to the ignition source not being close enough to the initial source of gas. This is normaally corrected by ensure the main burner is clean so that it distributes the gas correctly and having the ignition source at proper strength and location. I would have to have good schematics of your heater to be more specific. I hope this helps.

Sep 09, 2009 | RTO Atwood Water Heater - 6 Gal LP

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