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 Post subject: cental heating problem
PostPosted: Sun Oct 29, 2017 9:17 pm 
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hi can anyone advise my boiler lights are off when i put on the central heating only way to get it to fire up is to turn the Cylinder Stat up to 70+ ( honeywell L641A Cylinder Stat ) any advice welcome thanks

parts fitted so far 3 way valve and new heating control on kitchen wall


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PostPosted: Sun Oct 29, 2017 9:26 pm 
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My first thought would have been the 3 port valve, as the microswitch in this controls the heating.

Is it wired up correctly?

Needs testing with a multimeter to find where the problem lies.

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Dave

www.drlgas.co.uk



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