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I have a weil-mclain CGA-4-SPDN gas boiler, and can not get the pilot light to stay lit. Following the directions reset setting the valve to the off position then to pilot press the red button, lite the pilot and hold for a min. or more as soon as I release the button the pilot flame goes out.

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You need to replace the Thermocouple. (pilot safety device) It would be best to call a Technician about this.

Posted on Oct 22, 2008

  • Ray Oct 25, 2008

    I hope your problem is solved. Home Depot carrys many thermocouples. It could be difficult to replace. Follow all instructions.

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2 Answers

Make : Weil-McLain Model : CG-5-SPDN Series 12 I have the above mentioned boiler which is located on the 1st level of a three story one family house, the area where the boiler is located is insulated.


You don't have an optimum distribution of steam in your house. Try closing a little bit the valves supplying the heaters in the lower floors. Close a little bit more until you get the desired balance.

Nov 06, 2012 | Air Conditioners

1 Answer

CGA Mclain .Natural Gas boiler issue 70k btu with a effikal ventx damper, model RVGP. There is no blower for ventilation, no control board with lights. Pilot light will not stay lit. have already replaced...


hey Carli suspect you mean the pilot goes out as soon as u turn your gas control valve back to the on position!? If this is so, you will have to probable reset the flue spill switch located right at the exaust outlet. OR, SOMETIMES THEY HAVE ANOTHER LIMIT switch in the same circuit in series. If the pilot goes out when u release the pilot press down knob, then it is your thermo couple is loose or fininshed,or the pilot flame is not aimed properly at the sensor (thermo couple)

Sep 21, 2011 | Air Conditioners

1 Answer

Pilot light will not stay lit; replaced the thermocouple, still no work. Replaced the W/R gas valve 36C04-222 on my Trane furnace. Still not working. any ideas? Could I have gotten a bad replacement valve?...


Trane unit ,same White -Rogers gas valve. I have replaced both the gas valve and the thermocouple . Have agreat robust blue pilot while the button is pushed in , let go and the flame does not stay lit . I checked the milly D C volts and have better than 20 . Is there a problem with the new gas valve or the couple not generating enough volts or is there a safty I do not know about that could be open ?

Dec 15, 2010 | Air Conditioners

1 Answer

Im calling for heat from the thermastat and control panel, the boiler light and and the fan is running, but no matter how many times i keep re trying the pilot and burner will not commence, is there...


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

Nov 16, 2010 | Air Conditioners

1 Answer

We have an older (22 years?) 'Insta-Flame (model HE30 TN) natural gas fireplace insert. The pilot light is out, as we painted to inside of the firebox. The instructions show to 1) turn the dial to 'off'',...


On some gas valves the pilot setting is on the same dial as pilot on and on .on others the pilot light has aseperate button on right side of control dial. If yours has this there will be a cut out on cotrol dial that must be aligned with button to allow it to be depressed to light pilot. If yours has this align control dial cutout with pilot button,depress button and light pilot,hold for about one min. and slowly release,if pilot light stays lit,turn down thermostat and rotate control dial normally to right . There should be arrows or marks on dial and gas valve to line up. If pilot light stays lit turn dial to next position and check to see that pilot is still lit. This should be on position, turn up thermostat and burner should light. If your dial has pilot light setting on it then rotate dial to each position,try to depress dial and when you have right one dial will depress allowing you to light pilot. Follow same procedure as above and you should be in business. Hope this helps.Thank you

Nov 11, 2010 | Air Conditioners

1 Answer

I HAVE A 20+ BRYANT BOILER THE PILOT LIGHT IS OFF HOW DO I TURN IT BACK ON PLEASE HELP THANKING YOU IN ADVANCE MS I


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.

Oct 18, 2010 | Bryant Air Conditioners

1 Answer

The pilot light is out on our Apollo boiler and I can't seem to find anyway of putting it back on, its bloody freezing, we have no heating but hot water is fine, seperate tank.


Most likely it is the thermocouple. A 10.00 item at Lowe's or home depot. Easily removed and replaced. This devise is a safety device. It heats up to a certain temperature and the resistance changes back to the gas flow valve. After about 30 seconds of having the pilot on and the valve held down while lighting the pilot it should stay lit. If it does not, it is the thermocouple and has to be replaced. I did this on our apartmen'ts boiler a week ago and it works fine.
Hope this helped....
Kevin

Jan 31, 2009 | Air Conditioners

1 Answer

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.

Dec 28, 2008 | Ruud UBHC Air Conditioner

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