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Ran out of hot water, looked at the pilot light and it was extinguished. Try to reignite it and when I release the button after 45 seconds, it goes out again

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Posted on Jan 02, 2017

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SOURCE: Pilot light won't stay lit

Look for dust and lint. Look for them in places where gas should be freely flowing. I had a similar problem with an Empire Corcho wall-mounted propane ceramic catalyst heater. First it was the pilot light, then the #2 ceramic mantle. After horsing around with the gas lines and pressure regulators and trying to re-aim the pilot, it all turned out to be dust and lint in the gas passages. A little dust bunny in the brass pilot tube gave me a pilot light the shape and color of a banana. One puff of compressed air, and I got back my razor-sharp pilot. And some dust in the chimney of the #2 burner kept it burning blue/yellow and blistering paint off the upper surfaces of the heater. A bit of cleaning with a shop-vac put that right. "Passive" heaters are very much prone to this sort of problem because they rely on convection currents (i.e. LOW velocity) to get the job done. Convection currents are notorious dust collectors, as in COBWEB CITY.

Posted on Feb 28, 2009

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SOURCE: Tankless water heater pilot light will not stay on

It is most likely the water valve stuck open, telling the controls to heat water, that it thinks is flowing through it, but without actual flow it overheats. Depending on how comfortable you are with taking it apart yourself, you could open the valve to see if it just needs cleaned out, or if you have a ruptured diaphragm or some other cause.

Posted on Apr 22, 2009

  • 139 Answers

SOURCE: pilot will not stay lit after button release

most likely you have a thermopile that has low output. it takes about 100mv to maintain pilot light

Posted on Jun 25, 2009

jeff_drakesr
  • 155 Answers

SOURCE: water heater pilot

This is more than likely the thermocoupler. The thermo Coupler is a solid cylinder shape with a point on one end and a thick aluminum wire on the other the tip is situated so that it is in the pilot flame. When it reaches a certain temperature from the pilot it sends a signal for the gas valve to stay open and keep the pilot light. If it does not send the signal the valve closes and shuts the gas off for safety. Solution first make sure you hold button long enough to heat Thermocoupler (about 30 sec) if pilot still goes out then replace Thermocoupler. Can purchase at most hardware stores and all plumbing shops.
If this has been helpful please select a rating. Good Luck and have a Grt Weekend.

Posted on Apr 02, 2010

SOURCE: bosch 10p, the pilot light

Bosch Phone Support:
Gas Products Technical Support: 800-642-3111
Electric Product Technical Support: 866-330-2729

For Bosch tankless troubleshoot resources:
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html
For Rheem tankless resources:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

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Posted on Mar 28, 2011

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These are designed not to light once the thermocouple fails.the thermocouple has a small wire that positions in to the pilot light which checks the pilot is on and keeps the gas governed.once the temperature drops it shuts off the gas to prevent a build up of gas in a room where a pilot light has gone out.this is why you need to hold the button in on reignition to allow the thermocouple to heat up so the gas keeps open.
Try to relight by turning on the gas ....pressing down and holding the button for at least 10 seconds whilst firing the piezo to ignite flame.do not release gas button for at least 10 seconds then slowly release.if the flame on the pilot will not stay alight....then it is likely the thermo has failed.try cleaning the metal wire that is above the pilot jet.still no joy then it needs replacing.hope my comment is of help...please vote.

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The water heater pilot does not stay on?


The pilot light on hot water heaters is controlled by a thermocouple, a small copper rod that usually sits in or very close to the pilot light flame. When they go bad, which is not unusual, they do not allow the gas line to stay open and feed the pilot light. The easiest thing for you to do would be to replace the thermocouple. When following the pilot light lighting instructions, be sure to hold the valve button down for 30-45 seconds in order for the pilot light to heat the thermocouple prior to turning on the gas burner.

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1 Answer

Try to ignite pilot on 15/30b. flame ignites but goes out immediately when i realease the green button after 20 seconds. have replaced thermocouple but still no joy - any ideas ?


First, I'm assuming you have a residential Gas-Fired Heater or Water Heater that you are having problems with. My answer is based on this assumption.

Most thermocouples require that you hold the button for at least 45 seconds. Try holding the button for 60 seconds prior to releasing it. If this does not work, you can test your new thermocouple if you have a multimeter...preferably one with an alligator clip for your leads. To test your thermocouple, disconnect the end that screws into your gas valve. Set your multimeter to read Milivolts. Put your red lead on the copper line of the thermocouple.....it's easier if you have an alligator clip. With your pilot lit, hold down the button for 45 seconds and continue to hold while you put the black lead of your tester on the very end of the thermocouple (the part that attaches to the gas valve). You should read a minimum of 12 milivolts. If you do not read 12 milivolts, your new thermocouple is bad. If you are reading 12 milivolts, screw it back into the gas valve, relight, hold the button for minimum 45 seconds. Release the button. If the pilot goes out immediately, the problem (>99% probability) is with your gas valve.

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My old Ruudglas Pacemaker's pilot light went out.


Well if the hi limit is not out then you need to replace it.One more thing to check is to make sure the flame is touching the thermocouple.You can find parts for most water heater at lowes or home depot,plug hardware stores.You need to make sure you one for millvolts 750volts

Mar 14, 2009 | Water Heaters

2 Answers

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First check your gas supply, gas in bottle or lines? I know, this is basic & I'm not having a shot at you, but you'd be surprised at how many times it gets overlooked.

If you do still have gas supply, evident by that low hiss when you hold the pilot feeder button in (you might have to lean in close to hear it), then you need to check that the piezo is working. This is the bit which produces the spark to ignite your pilot. You will be able to see it sparking at the pilot outlet when you push the button (if you're looking in the right spot).

Ok, you have gas & a working spark? Not sure which buttons to press?

You mentioned the manual no longer being in a helpful condition...do you know which of the 4 buttons, 2 taps, 1 slide control & 1 dial do what?
Well just in case, here we go in simple form... first button on the left is the pilot feeder (lets gas through the pilot), second button from the left is the 'ON' button, third from left is the 'OFF' button & the fourth from the left is the piezo ignite button (gives you that much needed spark!). The slide controls your flame (how much gas gets fed to it). The dial, below the pushbuttons & slide, controls how much water flows through the system which then helps regulate the heat. Make sure the taps on your gas & water lines to the unit are on. There you go...2 taps = gas & water supply, 4 buttons = pilot gas, on, off, piezo (spark), 1 slider = gas/flame control, 1 dial = water flow control.

Ok let's see if we can light it! Water & gas supply turned on, slider set about 25% from left, dial set roughly in the middle, push in button 1 (1st from left) & hold in for about 10 seconds, you should hear a very faint hiss from pilot area. Yes? OK, keep holding button 1 in & press & release button 4 several times until pilot lights, you may not see a difference but if you can't see it and it does light you will hear the faint hiss change to a soft fluttering sound as the flame consumes the gas. Still OK? if so then the next step is to push in button 2 quite firmly & then release button1 as well. If all works as planned you will shortly have hot water supply restored.

If the above has not worked then your hot water service may just need a service to clean everything up & maybe replace a few worn or excessively corroded parts. Otherwise ,if there are no blockages in supply lines etc, then it may be time to replace it.

You neglected to say how long you've had it.

Cheers, hope this has helped.

Dennis

Feb 18, 2009 | Water Heaters

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