No heating? Check the motorised valve.
11:27
2 Port Central Heating Zone Valve CUT IN HALF Pt.2
12:01
How to Repair a Motorised Central Heating Valve
10:14
How to fix a Honeywell Zone Valve. Part number: V8043E1012 + V8043E1061
3:06
Radiators Coming On With Your Hot Water (Even With The Heating Off)? This Is The Cause
9:08
Motorised Valve Fault Finding
28:41
FB Live Training - Motorised Valve fault finding
17:47
How to test 3 port system wiring for issues. Reference Sheet at End of vid
7:12