Posted by Harold Kestenholz - Hydronic Network on December 21, 2001 at 10:04:53:
In Reply to: home boilers and heaters posted by marlon stevenson on December 20, 2001 at 13:52:31:
Treat it as a plumbing problem where a pipe is clogged. Drain the pipe, open the system, rod and clean the heater, return it to operation.