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Posted by HeatPro on December 23, 2008 at 23:01:34:
In Reply to: weil mclain vhe 4 problems posted by Jason on December 23, 2008 at 17:55:46:
To know if the pump is running, read the boiler thermometer and also use a thermometer at the return pipe of a system circuit that is supposed to be running and heating. If the temperature difference is less than 30 degrees, the circulator is running.