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Do-It-Yourself (DIY) Question & Answer Forum
Y Plan Heating System
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<blockquote data-quote="Raymondo" data-source="post: 369555" data-attributes="member: 24859"><p>When I turn the power on the pump starts to run straight away. When I press the heating button on the horsttmann c27 controller both heating and water lights come on and have no control via room or cylinder stats so boiler and pump just keep running with no control. checked a y plan wiring diagram and all looks ok, any ideas/ help would be appreciated. (3 port valve is a Honeywell V4073A.</p></blockquote><p></p>
[QUOTE="Raymondo, post: 369555, member: 24859"] When I turn the power on the pump starts to run straight away. When I press the heating button on the horsttmann c27 controller both heating and water lights come on and have no control via room or cylinder stats so boiler and pump just keep running with no control. checked a y plan wiring diagram and all looks ok, any ideas/ help would be appreciated. (3 port valve is a Honeywell V4073A. [/QUOTE]
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