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Hi am I correct in saying if water comes out of the top valve of the expansion vessel when depressed its faulty. would draining the boiler and re pressure be a waste of time thanks

how do you recharge expansion vessel thanks

Can anybody tell me where the main thermister is located can it be tested thanks

Hi after running for a few seconds the boiler trips out have checked the diaphrams they seem okay rang alpha they said pcb board faulty changed that still no heating any ideas please thanks