Hot water tank dial with green light?

[Rowdy76]

Hi.

On my boiler there is a box with a dial. This has a green light around it. It has numbers on it.

What is this for? Is it a pressure release valve that can be adjusted? When I turn it to zero, it flashes and water flows somewhere? Lol.

It was set at 2. It also turns clockwise to certain numbers too.

Thanks.

 

[Madrab]

I feel another crystal ball moment coming on ......

.... ahhhhh .... nope ....

What type, make, model etc is your boiler/hot water tank??

 

[Rowdy76]

God knows. I am at work or would have posted a pic. It's a ideal h12 boiler. Not sure about tank.

Mark.

 

[Rowdy76]

Hi.

Its the central heating pump. One side of dial is variable speed and other constant with bleed in middle. That was the noise I was hearing. Hope I haven't ****ed it by bleeding it.

Thanks.