This is an older gas boiler, when it works it is great! The igniter lights the pilot and then shuts off and on 3 or 4 times. I have found just yesterday that when I blow at the pilot, like getting a gas range to light, the burners on the furnace fire up! ? Any ideas?
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Re: Gas boiler won't stay lit!
The burners and pilot need to be cleaned.
Turn off gas and power, remove the burners and pilot. Clean with a brass wire brush. (Steel wire can be used but very carefully) Remove all rust dirt etc. reinstall and it should fire right up.
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I would check to make sure control on gas valve is in on position and pilot is lit if you have a standing pilot. If you have a spark or hot surface ignitor make sure they are trying to lit pilot. If you have standing pilot model and pilot lit is not on. Turn control on gas valve to off,wait five mins. then turn to pilot. Depress botton and try to light pilot. If it lights hold down for a couple of mins. then release.. If pilot stays lit turn control to on. If thermostat is calling for heat this should bring main burner on. If pilot does not stay lit then replace thermocouple. Hope this helps. Thanks
If it is a true "pilot" light, it needs to be held down long enough to generate the milivolts needed to prove to the gas valve that he is ready to open, other wise the gas valve would open, not igniting, thus causing a "gas leak". Turn the t-stat OFF, turn gas valve to pilot, push down on pilot knob, light pilot and hold for 2 minutes. After 2 mins let go, and if pilot stays lit, turn gas valve to ON, and turn the stat to heat and turn it up to desired temp. If pilot does not stay lit after doing above, try sanding thermo couple( the thing the flame is sitting in) or just spend the $15 bucks and replace therm couple. firstname.lastname@example.org
Turn the gas valve to pilot. Push knob down & hold. While holding, light pilot & keep knob held down for one minute. Let go of knob & see if pilot stays lit. then turn knob to on position. Boiler should then turn on.
Simple things first. Is the gas turned on? Some furnaces have a gas line fitting to shut off during summer months. The gas valve should line up in the direction of the gas line. Two: is the pilot lighting. Can you see a flame? It may also have an electronic igniter. When it comes on you should see a glowing hot stick or something similar in the pilot viewing hole. If you have a combination valve for you pilot. You must first turn it to pilot, hold it in and light it manually. Hold that button in until the pilot stays lit, then trun it to "on". If the thermostat is in the "heat " position and the thermostat is set to call for heat by turning the emo up higher than the current room temperature, the main flame should come on. Otherwise something complex is wrong with your system
You shut off the gas.
Shut off the power.
Remove the gas valve and burner assembly.
After cleaning and reassembly you must purge the system and use a gas leak detecting soap to verify no leaks before turning on the power.
Check the pilot light.Older standing pilot systems use thermocouples to verify the pilot is burning before the gas valve opens.If the pilot wont stay lit replace the thermocouple. Newer systems light the pilot.On a call for heat the igniter lights the pilot. When the heat is verified the gas valve opens . Some systems use an circuit board with flashing led lights to help troubleshooting.
If the burners do not fully ignite, the sensor will shut the furnace down. The lack of sufficient burner flame is a gas valve or gas pressure problem within the valve. Replacing the gas valve with the original one may get you going. I surely suggest a professional service company for safety reasons and a thorough inspection. A 20 year old furnace is past it's normal life span.