came home to find pump running although system had closed down(ON TIMER) 2 hrs. earlier. next day HW would not work but selecting Heating made boiler fire.
Type of boiler, system and controls ?
Does turning the room thermostat down stop the pump ?
It seems like the actuator is at fault, this should switch across for water or heating, it sounds like it's stuck in heating position change actuator head
[quote="htg engineer"]Type of boiler, system and controls ?
Does turning the room thermostat down stop the pump ?
It seems like the actuator is at fault, this should switch across for water or heating, it sounds like it's stuck in heating position change actuator head
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by htg engineer » Thu May 15, 2008 3:22 pm 
by DN12GEE » Thu Apr 02, 2020 9:08 pm
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