Posted by jim hullah on December 18, 2001 at 21:34:31:
I have 6 identical boilers 4 yrs old. One is giving me a pain. It doesn't keep the apt warm. It's n ot an air lock. I think it is the aquastat or pump. I'm going to start switching parts with my good working boilers to determine where the bad part is--pump, aquastat, thermostat, flu damper. Anyone have a more professional method I would like to know what it is. Thanks

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