Central Heating


Postby surveyorns » Sat Apr 26, 2008 1:01 pm

I have an unvented Megaflo system circa. 2005 and the radiators and boiler switch on on their own! even when the programmer and hall room stat is swithed to off ! ! The only way I can stop it is to isolate supply to the system - can anyone help please ! !
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Postby htg engineer » Sun Apr 27, 2008 1:11 pm

Possibly a fault with the 2/3 port valve, try switching to manual if the heating/water can then be switched on and off at the timer you'll need to replace the actuator head.
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