No hot water this morning - do I need a plumber?

[WhenDoISleep]

We have a boiler in the loft along with a cold water tank, plus a hot water tank in one of the bedrooms. The system is pretty old tbh. This morning there was no hot water. DH went up and repressurised (?) the boiler, but we still have no hot water. The central heating is working fine - DH put it on and is heated up very quickly. The hot water tank isn't making the noises I usually hear but it is making a constant noise like something is stuck.

Any ideas or do I need to call a plumber?

Call a gas engineer instead. Plumbers only work on tanks and pipework. However he may need to look at the boiler too which means a plumber wouldnt be able to do that.

Gas engineers are also plumbers before they become a gas engineer

Thanks - I've never been sure who looks at what as we had a gas engineer out during the winter as we had boiler/CH issues and when we called him again about the hot water - he said that he didn't cover that.

What colour is your hot water cylinder?

(This is not a joke)
Is water runnin in, out, or close to it?

What time did your boiler start working?

Fortunately the gas engineer I had booked for tomorrow morning had a last minute cancellation and came round this afternoon. Half an hour and some cash later and the tank has a shiny new valve and I have hot water. It had obviously been a problem for a while as the tank had always made quite a lot of noise but it is now very quiet - something DS2 will be thankful for as it is in his room.

PigletJohn I am intrigued to know what the colour signifies - it's a green colour.

green indicates it might be around 20 years old, and is a vented boiler, relying on a tank in the loft.

as well as the big tank that supplies cold water to the bottom of the cylinder, to supply the hot taps, there will also be a small tank that tops up the supply for the primary circiulation from the boiler to the cylinder and the radiators. It is not unusual for this to get blocked with sediment.

If this has happened, try bleeding the highest radiators in the house, and see if water gushes out forcefully and without dying away.

if you can see the circulating pump, feel it and see if it is surpisingly hot. If so, turn off the system.