Live Fault Finding #13 - faulty 3 port valve
4:40
Live Fault Finding #14 - No Hot Water
17:47
How to test 3 port system wiring for issues. Reference Sheet at End of vid
28:41
FB Live Training - Motorised Valve fault finding
7:42
No heating? Check the motorised valve.
9:08
Motorised Valve Fault Finding
11:04
How to replace a central heating 3 port divertor valve
19:26
Central Heating - How the mid position Y plan 3 port valve works
15:22