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Many thanks - will get it checked. Should have studied harder when at Clydebank college

It is an eco tech plus and I believe it is a VUI as as it has a mega flow cylinder for the hot water

My plumber has recently fitted a Vaillant + mega flow cylinder to replace the old combination boiler. Just getting used to it but there is one thing that I cannot find in the handbook. The timer is set for the hot water but when it is not during the required periods I can hear the boiler cycling...