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
Drayton training - Motorised Valve fault finding
23:49
3 port valve replacement on a central heating system
20:14
HOW TO WIRE A CENTRAL HEATING SYSTEM FROM SCRATCH - S PLAN
15:20
I Need Your Help, What Am I Missing?
18:32
Diagnosing Faulty Drayton Actuator and Replacing Unit
19:26