I have a gas hot water heater that won't ignite. The pilot is lit, it won.t ignite.?
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As long as the pilot stays on the thermocouple is fine.
Sounds like your gas valve may be stuck. A slight tap on valve may open it up as long as you have the heat knob in proper position ON and if it does open up you may need to replace the valve as the tap is not a fix just helps define problem area. Even if it doesn't open you may still have a valve problem it is just sometimes it will loosen up.
the thermo coupler is not working replace it.that is the little copper line tha goes to the pilot ...
First make sure valve knob is in the ON position. If so, the thermocouple is bad. The thermocouple is the tube shaped device that detects heat from the pilot. If it isn't working, it will not allow the gas to go to the burner. Replacements can be bought at hardware stores.
make sure your thermostat is turned to the proper setting you want and the gas valve is turned in correct position you may have to move it around to get it to work if not it sounds like you need a new gas valve there pretty high so id check these things first then price a gas valve verses a new water heater the pilot would not stay lite if the thermocouple was bad
could be a defective control valve/thermostat. Check to see if the control valve knob is in the "on" setting and not set to the "pilot" position.
make sure gas is on if not take a tooth pick and put it in the gas hole just needs cleaned out you know you have to hold it down for one min after it lights need more help let me know
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