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Snowyfox

Good afternoon. Our Greenstar i combi boiler works fine for heating but I am trying to find out why the boiler doesn't fire when I call for hot water. The fan seems to go but no blue light or firing up. Checked the pressure, all OK. The radiator underneath the boiler had a lot of air yesterday so I bled it. It heats up a treat when the heating is on. Might I need to reset the boiler if this has upset the system? Many thanks in advance
 
Pressure in the system when cold should be 1 bar / green area
 

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