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Mend Ravenheat CSI 85T Boiler Combi No Heat

Bolier not firing up?

I have a Ravenheat csi 85t combi boiler, 4 years old.
I heats up the water but will not fire up to heat radiators.
Its runs via wall mounted remote control system, which is working ok and communicating with the boiler.
Any ideas?

Tracey
August 2011

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