my pilot is on but when i turn tap or central heating on the boiler will not fire. if i pull clear tube off leading to the air pressure switch and blow down it it will come on. also if its the central heating i switch on when i do this it over heats and cuts off and the pump feels extreamly hot
The pumps sounds as if it needs to be replaced & either the pressur eswitch needs repalced or more likely the fan impellars need cleaned. Get a qualified engineer to do it.
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