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Hi, Although not as experienced as some of you, I am fully qualifed (with 4 year appenticeship) gas engineer and been working full time in the field for several years. Any advice on removal and replacement of Worcester Greenstar 24Ri PCB (my first time doing one of these!) Do they just pop...

Worcester Greenstar Ri (about 5/6 years old) Honeywell Programmer & room stat Motorised valve - Honeywell Pump - Grundfos I have an issue where both HW and CH can be off on the timing programmer and yet the pump remains on (as soon as the boiler is powered up). The only way to stop the...