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Pilot lights (not always) but gas will not flow into burner
Piezo ingnition model. Shut unit off for 5 days, when turned back on burner would not ignite. Pilot lights but not always. Prior to that burner was not staying lit for very long, would have to shut off water and turn it on again. hoping that it is as simple as a thermostat problem. Unit is mounted in a damp location.
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you either have a back draft blowing out the pilot light, or a bad thermal coupling. if coupling is bad it will shut down the gas flow therefore shutting off pilot light. its a safety measure to stop the gas flow if pilot goes out. replace thermal coupling, that may do it. good-day ! but shut off gas first !
If the pilot flame is weak, when the main burner is ignited, there can be enough 'whoosh' of air and gas to blow out the pilot. There may be a little of grit in the pilot valve jet hole restricting the flow, hence the weak flame. Try using a piece of fine wire to clear the obstruction. If that does not help the pilot jet will have to be unscrewed and cleaned with compressed air. Ensure the gas is turned off before attempting any maintenance.
There could be air in the gas line..just follow the instruction on the unit these unit always never give any trouble to ignite.. if you still having problem get a qualified technician to light it..
Sounds like a bad thermal coupling. The coupling is a temperature sensitive sensor that works with the pilot and controls the flow of gas. If it does not detect heat after a certain time it will shut down flow of gas.
You may have a plugged orifice in the pilot tube assy. If you have any way of getting to the orifice with compressed air, and blow back, it may dislodge it, if it is plugged. If possible, carefully remove pilot tube at valve end first, so that if it is debris in there, it blows clean of the tube, so it won't clog again. Otherwise you'll have to remove complete assy. Another thing to try as well, is to shut valve off, loosen fitting at valve for pilot tube, AND MAKING SURE NO FLAME OR SPARK ANYWHERE IN THE AREA, take a spray bottle with dish soap and water mixed (bubble tester) and then spray at pilot fitting when it is loose, and push pilot, to see if any bubbles appear, indicating gas flow. If no flow there, then I'd get a new gas valve.
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
I would check to see if the switch on the blower pressure sensor is closing...When T-stat calls for flame, the circuit starts the blower, then the blower pressure sensor switch closes to allow the main gas valve to be powered.
All new tank-type gas water heaters for the home are designed with Flammable Vapor Ignition Resistant systems. It sounds like the unit has shut down because of a venting problem. If it is a Rheem or Ruud (General Electric for Home Depot) you have to reploace the heater. Other brands alow for resetting this safety device. Don't take chances with gas if you are not absolutely sure of what you are doing - have a professional licensed plumber check out the problem.
Your thermocouple is bad, that's why it won't stay lit. But you are in the right place. The thermocouple is located right in front of the pilot burner. It generaly pulls out and then you follow the copper tubing back to the valve, unscrew the fitting and it will pull out. Go to your local hardware store and purchase one about the same length and install it back in the same order. Good luck.
Look inside the water heater when it is heating the water, the flame should be blue. If it has yellow tips on the flame, it needs an adjustment to the air shutter. There is a nut on this air shutter to make this adjustment. This adjusts the air gas mixture. You may first try just simply tapping on the burner lightly to loosen any debris that may have built up and vacuum it out. MAKE SURE YOU TURN OFF THE GAS BEFORE CLEANING THE BURNER!! Also, check for drafts that may be blowing out your pilot light, Furnace register or outside drafts on windy nights. Some water heaters have an automatic shut down if the water heater gets too hot, so don't have it set to its hottest setting. Most water heaters only last about 10 years or so, It could be you are ready for a new one....Joe
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