Heatmaker boiler problem

Old 05-04-19, 05:10 PM
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Heatmaker boiler problem

I have a heat maker boiler. It runs but I’m not getting heat to the two zones. If I disconnect the circulator pump and plug it Into an extension cord it will work and put the hot water to my two zones. So, what’s stopping this from working?
Thank you
Old 05-04-19, 09:42 PM
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Typically the circulator pump gets connected to an aquastat. It controls the boiler temps as well as the circulator when a demand is made. Can you post a few pictures of your system. Particularly the control box on the boiler. A pic with the cover off is helpful too.

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