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Posted by HeatPro on September 12, 2005 at 14:04:21:
In Reply to: Boiler overheating. Circulator running? posted by Connon on September 12, 2005 at 12:20:55:
You might have the common problem of getting an air lock after having opened the system. Go through the air purge precedures here:
http://64.226.150.132/hydronic/service/purgeair.htm
Then see if the circulator moves water. It is possible that the circulator has failed or is clogged, but that is less usual.