Hello everyone, Hoping to get some help on an issue.
Y-Plan system Programmer: Honeywell ST9400A Boiler: Ideal Logic Heat 15
If no program is selected, and I, for example, select the extra hour function on either the HTG or HW, the boiler fires up no problem. If I turn it off and then select the other function, the boiler shows the 'c' for calling but doesn't actually fire up.
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