Hi,
My glowworm 18hxi has over the last few days fired up as normal, 30 seconds later goes to full throttle and stays there till it switches off from timer.
It's also stuck on 73/74 in the display, turning the temperature dial either way doesn't adjust anything.
The boiler is in garage and makes a right row we can hear inside the house.
It's the same whether central heating or hot water is called.
Any ideas appreciated.
Thanks
My glowworm 18hxi has over the last few days fired up as normal, 30 seconds later goes to full throttle and stays there till it switches off from timer.
It's also stuck on 73/74 in the display, turning the temperature dial either way doesn't adjust anything.
The boiler is in garage and makes a right row we can hear inside the house.
It's the same whether central heating or hot water is called.
Any ideas appreciated.
Thanks
