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Re: Boiler won't start
Near one corner of the gas valve is a slottedplug.
It looks like large screw headremove the plug just like any screw. This lets you access the gas pressure adjustment screw.
Usually no more than one half to one full turn is needed. (clockwise to increase pressure)
It is important that you not have to much Gas pressure as this will cause overheating and premature heat exchanger failure.
The best thing to do is check the pressure going into the gas valve, and also coming out. Make sure the inlet side of the GV is not partially clogged where the pipe comes in. (especially if you have copper pipe with natural gas)
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Let's see what we can do to trouble-shoot this boiler--
First of all-- Are we talking about a Hot Water 'Boiler'-- In other words does this boiler heat water that circulates thru the house, to keep you warm?
Next-- What is your fuel?
Have you Shut the system down, to reset it?-- What happens when it comes back on again?-- Clicking sounds-- pumps trying to start-- solenoids trying to open, etc.-- Tell us what you observe-- so we can help you trouble shoot this problem.
Can you control heat with thermostat by turning it all the way down. I assume from your description that burner is running. If it is and turning t-stat all the way down made no difference I would remove t-stat from wall and remove red or white wires from it.This should cut power to gas valve turning burner off. If this works replace t-stat. Hope this helps. Thanks.
TURN WATER OFF TO UNIT AND ALL POWER AND GAS. EXTRACT ALL WATER AND REPAIR PLUMBING TO THE BOILER. IF WATER IS COMING OUT FROM THE BOTTOM, REPLACE BOILER... IF PLUMBING WAS REPAIRED SUFFICIENTLY AND NO WATER IS PRESENT...TURN ON WATER AND CHECK FOR LEAKS THEN TURN ON ALL POWER AND GAS TO THE UNIT AND RELIGHT PILOT....BE SURE THERE IS NO SMELL OF GAS PRESENT WHEN YOU LTE THE PILOT..IF IT DOESN'T LITE YOU MAY HAVE TO REPLACE THERMOCOUPLE OR CLEAN BURNER.
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.