Ah, the answer is "no" then. Should I? Could I?
Yes primary flow into the cylinder is the one.Now that is a new one on me... there's 3 motorised valves that I can see... I'm gonna guess that you mean one that goes to the big cylinder where there's a label marked "Primary Flow"?
Do you hold the relevant G3 qualification John?My money is that the pressure needle will go up to 4 then it will start running. Probably lost some charge from the expansion vessel so you've only got limited expansion capacity left. Ree charging is a simple job for a pro, and is more likely than a faulty vessel.
How hot is the hot water after its been running? Hot then it usually is off the heating? Scalding hot? Or just very hot washing up water hot?
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local