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

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Pilot light goes out after water heater shuts off.

I have the same water heater,when the water gets to temp the pilot light goes out also. Any help? Thanks!

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Sounds like the wiring is backwards check the wiring
also check the thermo coupler

Posted on Jul 27, 2009


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you either have a back draft blowing out the pilot light, or a bad thermal coupling. if coupling is bad it will shut down the gas flow therefore shutting off pilot light. its a safety measure to stop the gas flow if pilot goes out. replace thermal coupling, that may do it. good-day ! but shut off gas first !

Mar 21, 2012 | Water Heaters

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Enviro temp hot water heater. 1 week ago pilot out. Able to relight but would go out again once water heated to temp. Replaced thermal couple (tc) with same result. replaced gas therm/valve (t/v). ...

Remove your entire pilot assembly from the heater and gas valve. Remove the aluminum gas line that feeds the pilot assembly. There is a small orifice inside the pilot assembly that may or may not fall out when you take the line off. If it does not fall out remove it and be sure that the very small holes in the top of it are clear. It sounds to me like even though the flame is blue and in contact with the thermo-couple, when the main flame turns off it causes the pilot flame to wave away from the thermo-couple thus shutting it down due to a weak pilot. I have run into this several times and should do the trick.

Feb 02, 2011 | Water Heaters

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Pilot light goes out

if the unit goes thru the cycle of heating the water and when temp is met pilot goes out you need to replace the entire temp control if pilot goes out as soon as you release the pilot button you need to replace the thermo couple little copper wire the goes from regulator to inside burner...check for 800 number on front of w/h for warranty regulator can be expensive

Dec 09, 2010 | Reliance Natural Gas Water Heater Control

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The pilot light goes out. When I go to re-light the pilot and turn the temp for vacation to medium the flame goes out again.

The pilot light jet may have got a little bit of dirt or grit in it which is preventing it from keeping alight. Try probing the jet with a fine piece of wire to see it the blockage can be dislodged. You may have to unscrew the jet to clear it by blowing air through it. Make sure gas is turned off first before removing any parts.

The pilot light also has a thermocouple that allows gas to the pilot light while the flame is burning. If flame goes out it shuts gas off to the pilot jet. The thermocouple is bypassed by a switch during the initial ignition and once the thermocouple warms up after a minute or two of holding in the bypass switch, it should maintain the pilot. If, after cleaning, the pilot light keeps going out, it would seem that your thermocouple is faulty and needs to be replaced

Nov 26, 2010 | Rheem 40 Gallon FVR NATGAS Low WATER...

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Pilot will light, burner lights stays on for a while probably till it reachers temp then pilot goes out, its a rheem gaurdian 40 gal

This covers just the basics on no burner flame or pilot outage issues on standard tank gas water heaters and does not pertain to tankless or instantaneous heaters. As always, safety first; if you do not understand what you are doing, do not attempt to make repairs on your own. This is just a guide to help you figure out what may be wrong.

1) Let's take care of the obvious things first. If you have a propane gas water heater, make sure you are not out of gas! Go to the tank, lift the lid, look at the % gauge. If it's pointing at 5% or less, you may be empty or about to run out of gas. If it says you have plenty of gas, make sure the gauge is not sticking and bang the lid down. If the gauge drops down to 5% or less, order a gas delivery.

2) Remove the panel on the water heater to view the burner. Is the pilot still lit? Yes, then make sure the control knob is in the "ON" position. Also make sure the temp dial is not on "Vacation" setting or set at a very low temp setting. Typical dial settings are at medium "arrow" selection or "A" selection.

3) Is the pilot flame out? If you smell gas, do not attempt to light. Turn gas off at shut off valve on gasline to water heater and call your gas co. Otherwise, follow the manufacturer's lighting instructions on the water heater to relight. Pilot still won't light? Then you may have a dirty pilot orifice that needs cleaned. Or if you were out of gas and just got filled, you may have air in the lines and lighting the pilot will take longer than normal to light. It's best to have the gasman light this when he is there to fill your tank. It's also possible you have a control that is locked out or defective, which will require a serviceman to repair or replace the control.

Let's say you get the pilot flame lit. When you release the button, does it stay lit? No, then you might not have held the button down long enough, Try again. Still goes out? Is the pilot flame a strong blue color and actually making the thermocouple red hot? If so, and it won't stay lit, replace the thermocouple. Or is it a lazy yellow flame? If so, it may have burn't the tip off the thermocouple and it will need to be replaced. This condition is caused by a dirty pilot orifice, which will need to be cleaned with a broach to prevent it from ruining the new thermocouple you install.

4) Ok, let's say you relight the pilot and get the main burner to light as well, but later they both go out again. This only happens, of course, after the service tech has left. With it still off, get a flashlight and look inside the access panel in the area above the main burner? Do you see a lot of black soot build-up? If so, this make be causing your problem. Have your water heater serviced. If no soot, then check for blockage in your vent. Look for a bird nest or even a dead bird. Your vent cap is either going through your roof or through a wall to the outside. You'll need a ladder to check either. If it has bends and elbows, check those out for blockage too.

5) No blockage? Sometimes a vent is installed wrong (like under an eave) or you are getting a strong down draft. Make sure your vent cap is still attached on top of your vent too. Strong winds can blow out the pilot flame.

6) Here's another test you can do, if the pilot and burner shut down. Relight it as you did before and with the burner lit, reinstall the access panel. Now light a match at the draft diverter (standard water heaters have these on top which connect the water heater to the venting) Blow out the match near the edge of the draft diverter and watch where the smoke goes. (Shining a flashlight there also helps you see the smoke better) If it gets pulled into the draft diverter, it's working properly, pulling outside air in. If the smoke gets pushed out, you have a drafting problem. To make matters worse, you are also allowing carbon monoxide into the home. Have your water heater serviced immediately. I also recommend having a carbon monoxide detector located on every level in houses that have gas or oil appliances.

These are just a few ideas to help you figure out your common lighting issues. There are other issues that I did not cover, which may require a repairman. I hope you find these useful. If you still have concerns, please ask away! That's why we are here! Douglas

Sep 02, 2010 | Rheem Water Heaters

1 Answer

The pilot light on my gas water heater continually goes out. I can re-light the pilot and get it going. The gas burners goes on runs for awhile. I'm assuming when that when the temp hits the desired temp...


The pilot assembly should look similar to the pic above. Depending on where you live, you may be required to hire a certified plumber to replace the parts. If not you can do it your self. Keep in mind if it's not staying lit you also need to check the thermostat and the thermocoupler before replacing the pilot assembly. There is a good chance it is just the thermocoupler going out. It is one of the first things to check when troubleshooting a pilot light problem with a gas water heater. A thermocouple determines if the pilot light is lit. If it's not lit, the gas valve fails. If that's the problem, replace the thermocouple.

  1. Shut off the gas valve on the water heater and the gas valve on the line near the heater. Remove outer and inner doors, and loosen the pilot and supply tubes and the thermocouple connections to remove the burner assembly.
  2. Step 2 Loosen the screw holding the thermocouple to the bracket. Remove old thermocouple. Bring it with you to the store to ensure you are buying the proper replacement.
  3. Step 3 Install the new thermocouple. Position the thermocouple so that the pilot flame heats 1/2 inch of the tip.
  4. Step 4 Reinstall burner assembly in the water heater. Tighten burner supply tube, pilot tube and thermocouple connections. Tighten thermocouple no more than a quarter turn more than hand-tight.
  5. Step 5 Turn on both gas valves. Check supply tube and pilot tube for leaks with soapy water. If soap bubbles, tighten connections to fix leak. Ignite the pilot light, and make sure the thermocouple tip is heating up. Replace inner and outer doors.

Jul 09, 2009 | Northern Tool Water Heaters

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