Low Water light on - intermittent heat

AC_2

I have a Williamson furnace (model# GWA-105N-S). When I got up this morning, my house was quite cold. I went to the basement and the low water (red light) indicator was on.

The furnace starts when the light goes out, but stops as soon as the light comes back on. My HVAC guy is out of town - and of course this would happen on one of the coldest days of the year!

Any quick-fix suggestions?

Ron Schroeder

LWCO

Check water pressure, do you hear water in the pipes, your reither getting air by the probe or probe is dirty. but sounds like air boiler runs until circulator starts and pulling air by the probe, purge system of air if thats the case, if no presssure in boiler open valve by waterfeed until it pressurizes.

Empire_2

STeam or hot water?

Ron Schroeder

Mike

GWA is hot water

Empire_2

In that case

I think Bruce said it all. I'm just wondering if the LWCO is a "Guard Dog" type where they specify a shallow tee where the LWCO is attached. Can't have to much of a horixontal piece where it connects.

Mark Hunt

Could also be


a Taco LWCO with the "water purity" sensor.

Had trouble with a couple of those so we yanked 'em.

Mark H

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AC_2

Thanks, Bruce. Your suggestion did the trick. We're snug as the proverbial bugs thanks to you.

Ron Schroeder

Glad it worked

And thanks for letting me know