My Rinnai boliler is on my boat.. Gas bottle feed. why does the pilot light keep going out?The pilot light slowly goes out even though there is plenty of gas.
If your pilot on your gas water heater will not stay lit you need to take one step at a time.
Let's look at how you tried top light it. Turn the gas valve to the off position and then move it to the pilot position. If you can see inside under the heater and there is no glass view window you need to take a lighter or a match on an extended stick so the flame can sit right under the pilot tube. Push down on the red button and then the gas should light on the pilot burner. Hold the button down for a FULL 60 seconds.
Then slowly release the red button the main burner should then come on. Now if the pilot flame goes out right away as you're releasing the red button you have one or two more things you need to look at.
1st would be to replace the thermo coupling. You have to remove the whole burner tray to do that. If that does not work then the gas valve is bad and you need to replace it also. Make sure that when you buy a new gas valve you match up the gas type Natural gas to L P gas. They must match with the gas feeding your house or it will never work,
Thanks and best of luck
R J
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
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