Help! (please) I had a new boiler installed, a Glow worm (Flexicom30hx) and it developed this strange fault - every Monday/Tuesday the boiler does not switch onto its programme and flashes a fault F11. I contacted Glow Worm whose engineer took the front off the boiler, looked at it and says "Nope not the boiler this is your pipes or clock that are at fault". So the guy who installed my Altech Timer came and looked at it and said "Nope no fault here this is the plumbers problem" So the plumber came and said it was maybe a block in one of the pipes as the result of sludge, poured in a cleaning agent and let it run. But still the fault happened, so now he wants to bring some sort of gadget to pressure clean the pipes to clean the blockage, but I keep saying (and apparently no one listens to this Granny!) that if the problem was a blockage in the pipes, surely the system wouldn`t breakdown only on a Monday/Tuesday whilst working perfectly on the other days? I would really value your input to this mystery as I can`t afford to spend money getting these pipes pressure cleaned if the fault is in the clock or the boiler.
Thank you.
Thank you.