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Rinnai burner goes out when ignition button is released

I just bought a 2nd hand Rinnai Econoheat 850 gas heater.
When I press the control button down, the ignition works fine and burners come on (gas supply present) and start turning bright. But when I release it after holding for 10 seconds, the burner goes off. I have tried ventilating the room, replacing the battery and also holding the button down longer (30 sec, 1 mn, even 3 mins) but these don't help. Can someone please help?

Thanks,
Winter coming

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  • Anonymous Mar 26, 2014

    2nd and 3rd ignition buttons are stuck in the on position. How do I release them?

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The thermocouple [s] require replacement, or in my experience try servicing the unit first. There is an injector for the main pilot and a secondary injector for the flame thrower ignition. Both of these are prone to blocking due to dust and can be enough to shut the unit down. Although usually this is thermocouple related as you are manually keeping the unit running when you hold down the button, if the tcouple is broken it wont send enough millivolts to hold the magnetic valve open when you release the button.
Cheers

Posted on May 31, 2009

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Hi there,

Firstly I suggest blowing out the burners with compressed air to see if that makes a difference. Could be the burners are carboned up and just need cleaning. Also blow through the air hose with the igniter button down. Sometimes if the heater has sat for a while in or near a damp area the hose gets moisture in it and it will stop the burners also.
If this doesn't work then it would seem that the sensor beside the igniter is probably stuffed and will need replacing. This sensor is a fluid type sensor and when they burst or get a hole in them it stops the candles burning.

Hope this helps

Regards
Bfryan

Posted on May 22, 2009

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1 Answer

This is regarding my Rinnai gas heater Model 1260 S.When On button is pressed, it burns and glows the plate but when released , Gas stopped and it turns off.


problem is proberly the thermocouple burnt out .FSD
(fail safe device) normally you push the button in and the pilot light or flame is ignited,this flame heats the thermocouple that generates a small voltage that holds the gas valve open.
if the thermocouple is burnt out or not set correctly in the flame or the pilot flame is to small , as you say when you release the button it goes out, looks like you need a new thermocouple.

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Here is what I find:

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Disconnect EZConnect™ or MSA controls to isolate the problem.
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Check igniter wiring harness for damage.
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IF it has been working fine and now it isn't, I would suspect an ignitor problem.

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see this steps and fix it. God bless you
.
If there is no heat, check the electrical service panel for a burned fuse or tripped breaker. Relight the pilot light (see below).
If there is not enough heat, adjust the burner air shutter (see below); and clean the burner ports (see below).
If the pilot light does not light or does not stay lit, clean the pilot orifice carefully with a toothpick, test the thermocouple and replace it if it is faulty (see below).
If the flame flickers, adjust the pilot (see below).
If there is an exploding sound when the burner ignites, adjust the pilot to a higher setting and clean the pilot orifice and the burner ports.
If the burner takes more than a few seconds to ignite, clean the pilot orifice and adjust the pilot light.
If the burner flame is uneven, clean the burner ports. If the burner flame is very yellow, clean the burner; open vents in the furnace room to provide more air; adjust the burner air shutter.
To light the pilot on a standing-pilot (always on) ignition system, follow the lighting instructions located near the control. Otherwise, try these steps:
Light the pilot:
  1. gasfurnace1.jpg Press and hold the pilot control knob to start the pilot. Set the control knob to the pilot position. Hold a long match under the pilot gas port.
  2. Press the control knob; the pilot should light. Hold the control knob down until the flame is burning brightly (about 30 seconds). Release pressure on the knob, and turn it to the on position.
  3. If the pilot goes out when you release the control knob, try relighting, holding the control knob down longer. If the pilot again goes out, check the thermocouple (below).
Adjust the pilot:
  1. Remove any cap covering the pilot adjusting screw on a combination control.
  2. Turn the adjusting screw counterclockwise to increase the flame or clockwise to decrease it. It is correctly adjusted when the flame envelops the thermocouple bulb by 1/2 inch and appears dark blue with a small yellow tip.
Test and replace a thermocouple:
  1. Hold the control knob to pilot and light the pilot as above.
  2. Unscrew the thermocouple fitting with an open-ended wrench.
  3. Set a multimeter to the DVC (lowest voltage) scale.
  4. Clip one multimeter lead to the end of the thermocouple tube nearest the pilot and the other lead to the fitting on the other end of the tube.
  5. If the multimeter shows a reading besides zero, the thermocouple is functioning. Replace the thermocouple tube.
  6. If there is no reading, you will need to clean or replace the thermocouple following steps 7 through 11.
  7. Release the control knob and shut off the main gas valve on the gas-supply pipe that leads into the burner. Shut off power to the burner at the electrical service panel .
  8. Remove the thermocouple from its mounting bracket.
  9. Wipe the combination control clean and install a new thermocouple, tightening it by hand, then give it a one-quarter turn with a wrench.
  10. Insert the thermocouple into the pilot bracket, being careful to not crimp the tubing.
  11. Turn on power to the furnace and relight the pilot (above).
Adjust an adjustable burner air shutter:
  1. Set the thermostat to its highest setting to keep the burner running. Once the furnace has heated up, remove the burner access panel and loosen the locking screw.
  2. Open the shutter by turning it to the right until the blue base of the flame appears to lift slightly from the burner port surface. Then close the shutter until the flame reseats itself on the surface.
Clean removable burner tubes and ports:
  1. Shut off gas and power to the furnace.
  2. Unscrew or loosen and remove the tubes from the supporting bracket.
  3. Carefully clean the tubes with a brush or vacuum, making sure not to damage the burner ports.
  4. Use a stiff wire to clear any debris from clogged ports.

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1 Answer

I have a rinnai LPG 6 burner gas heater, it starts fine but wont ignite the middle left burner. It has a blue flame over the top that occasionally radiates down the burner. All the other 5 burners work...


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lpg injectors are only half the size hole of natural gas injector, could have a blockage in the injector diverting the gas flow

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1 Answer

Is there any possibility my Rinnai econoheat850 gas heater can give off carbon monoxide?


Any time there is combustion of any type fuel, from a Rinnai heater to a car engine. There is always a small amount of Carbon Monoxide given off. But, it's usually in small insignificant amounts.

Since your model is a Vent-free or flue-less model, the chances are a little higher. This usually occurs if the heater has not been properly and regularly maintained. Keep in mind, flue-less heaters take in household air for combustion, heat it and send it back out. Whatever is floating in the household air (duct, lint, pet hair, etc) is pulled into the heater. These things can clog the burner(s), the pilot and the Oxygen Depletion Sensor (ODS) and cause incomplete combustion. Which translates into higher than normal Co levels. However, your unit is equipped with an ODS, that will shut the gas off to the heater, if the household oxygen level reaches 25%. Which is not the danger level, which is 19%. Once the Oxygen level returns to 30%, the ODS will release the gas valve and gas will return to the pilot, so that you can relight it.

When properly maintained and operated according to the Owners Manual (see link below) they are totally safe. In the last 20 years, millions of vent-free/flue-less heaters have been sold and operated throughout the world. There has never been a death related to their use.

Certainly, if you or your family think you are experiencing signs of carbon monoxide poisoning, stop using the heater and have a qualified Rinnai technician check and service the heater. If you have other gas appliances in the house, it may be one of them causing the symptoms and not the heater. You may want to have those check and serviced, too.

http://www.rinnai.com.au/images/stories/operating_instructions/Heating/Portables/Cosyglow&Econoheat.pdf


I hope I was able to help you. Please let me know. Thanks.

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When you say "it won't stay on at all." Do you mean the burner and the pilot flame shut off together or does the pilot remain lit? Is the unit showing any Fault Codes on the LCD display?

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