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I think the problem here is fairly apparent. Can anyone identify the hardware I have or suggest the easiest way to fix ? Many thanks in advance

V4073A1088 28MM HONEYWELL MOTORISED MID-POSITION VALVE At rest with no demand from heating or HW, the motor is very hot. Is this normal ? Am also fairly sure the mid-positon for CH/HW demand is not working. Also, I am sure the valve is rattling inside the pipework. Have tried adjusting the...

I have a Glow-worm Ultimate 120FF 1998, one fuse PCB I do not seem to have a "normal" pump overrun, ie when controls stop calling for heat the boiler/pumop switch off. This can result in heat building up inside the boiler and lots of gurgling etc. Very seldomly, the pump will come back on...

Have a Glowworm Ultimate 120ff, heat exchanger is fizzing and gurgling and kettleing Can I add treatment to the system to cure ? or do I need a powerflush ? I have drained down the system and added inhibitor in the past etc so know how to do it. If I can do it manually which chemicals...