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Hello good folks of Heating Help,
I recently purchased a house that has an oil fed steam boiler (pic of boiler system attached). Everything works great, except the auto water feeder (Mcdonnell-Miller model WFE-24). When the boiler is running, everything works as expected. If the water level goes too low, the auto water feed will add enough water and then stop. But, when the boiler is idle, the auto water feed will continuously add water until it floods. I find it odd that when the boiler is on, it works fine and doesn't flood itself. I suspect it's either the LWCO or auto water feed. I checked the auto water feed and see that it's set to the default dwell/feed setting, which is appropriate for my house (WFE-24 manual
). I flush out the LWCO, which only has minimal sentiment. By no means am I an expert on steam boiler systems, does the community have any ideas on what I should troubleshoot?