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home Fix label Heating label_important Home Heating Systems

My Sunvic 207XL Controled system?

When I press the + One hour, for hot water the boiler won't start up, but if I turn up the thermostate and press the + One hour for heating as well, then the boiler fires up.
Any idea's why it wont run on hot water only please?

Thanking you,
Mike
Mike, June 2010
home Fix label Heating label_important Home Heating Systemsdone
Not an answer, sorry.
Mine started doing this then the water heater stopped working completely last week.I still can't get it to work although the heating works ok?

Marc, October 2010
microswitch in motorised valve actuator is not working.

Ian, June 2010

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