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Posted by Steamhead on December 26, 2009 at 21:37:08:
In Reply to: sight glass full, won't stop draining posted by Barry on December 26, 2009 at 05:04:06:
If the unit has an automatic fill valve (even if you're not using it) it could be leaking. Keep draining it until the level in the glass is where you usually set it, then make sure all the manually-operated valves are off. If the boiler doesn't flood again, you know what's wrong.
Fixing this will require the services of a pro.
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