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Hi guys Anyone familiar with Grant oil boiler? The boiler is consistently overflowing and the water from overflowing is rusty I have been told that the expansion vessel is dead I have decided to open it today and the water is completely rusty as you can see How do l know if it’s actually...

Hi all Trying to install hive single channel on a combi grant oil boiler I have removed honeycomb channel programmer. But a bit confused as there are 5 wires come from the fused connection unit, what should l do with Grey and Black from the fused connection unit circled in green? See attached...

Hi guys I’m trying to install Hive on Combi oil boiler Am l right to think that l just need to remove the current thermostat controller? What would the cabling diagram be after removing the current thermostat? Thanks