Troubleshooting No Ignition

nickr

Single pipe steam, Utica gas boiler with pilot light lit. Damper opens when the thermostat calls for heat, but the boiler just won’t ignite. LWCO seems fine, water level seems fine, I’ve moved the pressuretrol setting all the way up to see if that’s the issue, still nothing.

What could be causing the failure to ignite?

HVACNUT

End switch, spill switch, Rollout, gas valve.

pecmsg

Seems Fine is not troubleshooting.

Now you need a meter and follow the voltage.

EdTheHeaterMan

When I look at electricity with my eyes, it seems fine also. I can hardly see any trouble. Like it is invisible until it gets to a light bulb. When that happens, I see the light!

In the case of a gas valve, there are a series of safety devices the electricity needs to pass thru. You can find them by following the wires. If all the different safety switches seem fine then you will need a meter to see if one of them is not so fine. ALL the safety devices need to be able to let the electricity get to the gas valve.  If just one of the devices is not letting the electricity get to the gas valve, then the gas valve will not open to let the gas get to the burner.  When the gas does not get to the burners, then there will be no heat.

nickr

Geez a guy makes one stray comment. All right, I’ll follow the current.

Grallert

tough crowd sometimes