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Have a small rinnai(18???) lpg califont in my boat used for water heating. Gas pilot light will not ignite burner or if it does the burner flame goes out with in half a second. Have checked water pressure on accumulator pressure tank, changed batteries but to no avail. Has been getting progressively worse

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Posted on Jan 02, 2017

  • 8 Answers

SOURCE: the pilot light on my gas water heater continually goes out

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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.

Posted on Jul 09, 2009

  • 1 Answer

SOURCE: GE gas water heater lights for only a few seconds.

Called GE and there is a glass vile under the burner that is defective and cuts off the oxygen.
They are mailing out a replacement to my house & have contracted a plumber to install. waiting 4 days now. They say that the glass vile incinerates and there is not any thing left to it. The burner area is full of black soot. will post again one fixed.

Posted on Jan 21, 2010

Testimonial: "This is an accurate description of my own follow up. That device, a TRD, was the indeed the problem. "

  • 2463 Answers

SOURCE: We have an older Rheem Fury (gas) water heater and

Hi I would try changing the thermocouple

Posted on Jan 24, 2010

  • 1 Answer

SOURCE: burner lights but will not shut off. then pressure

i am having the same problem with mine changed the pressure relief valve and the ECO \ TSTAT but still gets extremely hot can't even touch the water what else could it be

Posted on May 02, 2010

  • 102 Answers

SOURCE: why does the pilot light keep going out?

Make sure your pilot flame is hitting the thermocoupler. If not then use air to clean pilot port and try again.

Posted on May 05, 2010

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I have a new Atwood G6A-7 water heater. The pilot lights fine but gas flow, when it turns on, is so strong it will blow the pilot out. Certain times, it sounds and looks like a mini fire ball going


Clean burner tube with proper brush, such as long spring type for bar-b-Q burner tube that are available at most hardware stores, and make sure you have new burner tube aligned properly (straight on) with brass orifice on gas control. Then be sure to adjust air shutter for nice blue flame, with little orange at tip. Do not give so much air that flame roars or jumps off the end of the burner tube. Too many people think more air, less fuel, but actually, when flame roaring and jumping off end of tube, the heat passes through faster and it takes longer to heat the water inside the tank. Like I said, only enough air to have quiet, steady blue flame. If your not giving it enough air, you'll see dark soot on trailer above water heater, which indicates burning too rich, need more air, or perhaps pilot is partially plugged. Pilot flame should also be blue, not yellow/orange. Small air intake hole on side of fitting just before pilot tube can get spider web, or debris in it as well. Use air to blow that out or a piece of wire like a paper-clip to clean inside that hole.

Dec 12, 2012 | Atwood G6A-7 G6A7 Manual Pilot 6 Gallon RV...

1 Answer

The pilot won't stay lit on gas hot water tank.


Make sure thermocouple tip is seated inside the burner flame.
Make sure thermocouple is not overtightened. Finger-tight + 1/4 turn.
If the pilot lights, then ECO energy cut off is not tripped, but gas control valve might be bad.
Check color of pilot flame: it should be strong and clear blue.
If pilot flame is weak, or color of flame is yellow-orange: Clean pilot orifice and burner and combustion parts on yearly basis.
Clean air intake screen if applicable.
Increase air supply to water heater. Open a window and see what happens.
Check for adequate draft going up chimney using match under vent hood to see if smoke drafts immediately upwards.
Bleed air out of gas line.
Check gas pressure.

Open following links for troubleshoot resources:
http://waterheatertimer.org/pdf/Pilot-light-will-not-stay-lit.pdf
http://waterheatertimer.org/pdf/Pilot-outage-troubleshooting.pdf
http://waterheatertimer.org/pdf/Vent-spillage-test-atmospheric-gas-water-heater.pdf
http://waterheatertimer.org/How-to-install-gas-water-heater.html#troubleshoot

Sep 21, 2011 | Water Heaters

1 Answer

The pilot will light but as soon as the button is released is goes out


1) If water heater has electronic gas control thermostat, then the gas control needs to be tested and possibly replaced. Add a comment and describe electronic gas control.

2) If water heater has non-electronic gas control thermostats, problem sounds like the thermocouple. Problem could also be bad gas control.
Make sure end of thermocouple sits in the pilot flame.
http://www.youtube.com/watch?v=v0aBPsNg6vo

Buy thermocouple at local hardware. They vary by length, for example 18".
Thermocouple screws into bottom of gas control thermostat.
Finger tight plus 1/4 turn. No pipe joint compound or teflon tape on threads.
http://waterheatertimer.org/images/IMG_9146-gas-control-thermo.jpg

Heat from pilot flame travels to gas control thermostat.
Heat is changed into small electric current using a thermistor.
The small current tells gas control that pilot flame is ON, and so gas control keeps gas flowing.
If thermocouple is not working, or has fallen away from pilot flame, the gas control turns off gas to pilot.
This safety device is necessary so gas does not fill up house and cause explosion.

http://waterheatertimer.org/How-to-install-gas-water-heater.html#clean

Aug 22, 2011 | Water Heaters

1 Answer

Pilot light lights but goes out when i turn valve to on


Near the pilot there should be a small metal bulb at the end of what looks like a wire which leads back to the control valve. It's called a thermocouple and it produces a small electrical current when heated. Non-electric heating units have a similar device which does the same job using pressure produced by heating a fluid within the bulb but for our purposes here the difference between the two doesn't matter. The function of the thermocouple is to hold the gas valve open for normal operation of the pilot. If the pilot flame goes out the thermocouple cools and disables the valve so that when the thermostat calls for heat, the gas will not be released if there is no pilot to light the burner. Check to make sure the bulb is being heated by the pilot flame, it may need to be repositioned or the pilot may need to be cleaned of carbon buildup to make it produce an adequate flame. If the thermocouple is close enough to an adequate pilot flame and still you cannot sustain the pilot flame when going from "pilot" to "on" position, the thermocouple is probably the problem so replace it. If the problem still exists, assuming you have already made certain that you have an adequate fuel supply, the problem is in the burner control valve. Changing that is something you should consider leaving to a qualified service person.

Jun 30, 2011 | RTO Atwood DSI-RV Water Heater-6 Gallon

1 Answer

Pilot hard to lite when lites stays on about 15 minutes goes out this is on reliance gas hot water heater 101


The thermocouple has gone bad or in this case is going bad to the point that it is useless.

The thermocouple is the pilot's, well, co-pilot! It is the electronic device that senses if the pilot flame is hot enough to ignite natural gas or propane fuel to the burner. If the thermocouple thinks it's safe, then it keeps open the main gas valve located in the pilot assembly. If the thermocouple does not sense enough heat from the pilot flame (such as when the pilot is out), then the thermocouple shuts off the gas valve to the burners.
How the Thermocouple Works
So what is this thing and how does it work? Well the thermocouple (technically called a thermocouple junction) is a device that contains two metal wires welded at the ends and placed inside a protective metal case. The thermocouple sensor is found at the business end of the pilot flame and is designed to be placed in the hottest part of the flame. The other end is connected to the pilot valve body. As the thermocouple heats up, it produces a small amount of electricity and when it gets hot enough from the pilot, send a signal to open the gas valve by using a solenoid operated by a 24 volt transformer. The thermocouple calls the shots, and by converting heat to an electrical signal, it allows the gas valve to open or close. Once the gas valve is open, gas is then constantly supplied to the pilot and as required for the gas burners (as called for by the thermostat). If the pilot goes out, then the thermocouple gets cold and produces no electric signal to open the gas valve's solenoid and the gas valve shuts off the gas supply to the pilot and burners. Neat huh?

Feb 04, 2011 | RTO W4 A.O Smith Gas Hot Water Heater...

1 Answer

Why does the pilot light keep going out?


Make sure your pilot flame is hitting the thermocoupler. If not then use air to clean pilot port and try again.

May 05, 2010 | Water Heaters

1 Answer

Hi Our gas water heater is not igniting


you need to replace the thermocouple its an electronic device that keep the gas flowing . the pilot light is always on and the thermo couple controls the flame. if it goes bad the flame goes out and the burner wont come on to heat the water, they are easy to replace and available at all home depot or a lowes kind of store.

Dec 01, 2009 | Water Heaters

2 Answers

The pilot goes off and on and does not light the burner


ok make sure u turn everthing thing off then wait 5 min then turn the dail that controls the heat on it to pilot light then turn the gas nob to pilot then ignit it once lit wait a few seconds and turn gas nob to on pisition then turn heat dail to were the arrow is not to a b or c cause the gas is to high it will blow it self out

Nov 17, 2009 | Bosch 1600H-NG Natural Gas AquaStar...

1 Answer

Lighting the pilot light


The steps involved can vary slightly depending on your furnace model and pilot valve type, so if possible try and find the instructions inside the furnace door cover or in the instruction manual. This is for a gas fired furnace, but applies to any gas-fueled appliance including water heater. Two of the most common types of pilot valve body assemblies either have a red reset button and a gas valve or no reset button and a valve knob that can be depressed. But whichever type you've got, if you have an older model furnace with a standing pilot (flame is lit all the time) then this is the basic procedure.
  • Turn you thermostat to 80 degrees or to a setting that will demand heat. Make sure the thermostat is in "Heat" mode.
  • Go to the furnace and find the pilot valve. The pilot valve body is a box shaped device into which the main gas line will run and is located near the gas burners. It will usually have a gas **** or valve knob that reads "On, "Pilot" and "Off." Locate this gas **** or knob.
  • Turn the knob or gas **** to the "Off" position and wait about 3 minutes for any residual gas to clear away.
  • Find the pilot. It's located near the gas burner tube assembly in the furnace.
  • Get your match or lighter ready. Sometimes the pilot is hard to reach. If possible, try and use a long fireplace match when you light it. If you don't have a fireplace match then a butane BBQ grill lighter works well too. If you don't have that, then you can fasten a match to the end of a stick when you light the pilot
  • If you have a pilot with a red Reset button, turn the gas valve from "Off," to "Pilot."
  • If you have a pilot with no red button, turn the knob from "Off" to "Pilot."
  • Place the lit match or ignited lighter tip at the pilot and depress and hold the button or depress the knob as appropriate. Depress the button or knob for about 30 seconds. This maintains gas flow to the pilot until the thermocouple gets hot enough to open the main gas valve.
  • Once the pilot stays lit, slowly release the button or knob and turn the gas **** or knob from the "Pilot" position to the "On" position. This will ignite the burners and keep the flow of gas supplied as required for the burners as called for by the thermostat.
  • If the burners fail to ignite then it may be because the thermocouple did not get hot enough to open the gas valve. Wait a few minutes and then repeat the above procedure. This time hold the red reset button or depress the knob for about 45-60 seconds.
  • Once the main furnace burners ignite, adjust the thermostat to the desired setting.
  • If you've followed the previous steps on lighting the pilot and it still does not light after, or will not stay lit, then you probably have a problem with the thermocouple or an adjustment needs to be made to the pilot. You'll need a furnace service technician to replace or repair these parts. You may find that the pilot lights, but it is an anemic looking flame. That's a different problem we'll look at in the next section.
  • If the pilot lights but the flame is a weak yellow flame, it will not get hot enough to heat the thermocouple to its set point allowing the gas valve to open.
    A natural gas flame should be a bright blue with the tip of the flame having just a tinge of yellow. A propane flame should have a bluish green flame with a tinge of yellow at the tip. The flame should be strong enough to hit the thermocouple tip about 1/2 inch from the tip end. If the flame is weak or shaky looking, check to see that a breeze or draft is not blowing on it. Adjusting the Flame
    There is usually a small screw on the pilot valve body that will adjust the flame. You may have to refer to the manufacturer's instructions to find the screw. Turn the screw as needed to adjust the flame throw. Yellow Flame
    A yellow flame is caused by lack of air and incomplete combustion. It can be caused by a dirty pilot tube tip. Split Flame
    This is caused by dirt in the pilot tube. Take a needle or small nail and gently clean the tube. Flickering or Wavering Flame
    A flame that flickers is usually caused by a draft.
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Feb 18, 2009 | Water Heaters

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