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                Can I get the instructions to add more water to boiler pressure is just bel?
 
                Main Combo Eco Boiler Error Code E133?
 
                Why does my boiler keep switching on and off?
 
                My Main 30HE loses pressure over 24 hour period?
 
                Fault on fan or flue?
 
                can I fit this myself or do I need to be gas safe engineer?