Boiler keeps turn on

[Sakir]

Hi there

Some help and advise would be greatly appreciated.

I have a Worcester Greenstar 18i boiler with a unvented hot water cylinder. I have two issues with my central heating system:

1. When the hot water is switched on, a few of the radiators get very hot. I think this is due to a faulty diverter?? Please can someone confirm.

2. When the central heating is on, the display on the boiler shows the system temperature. As it heats up, the temperature increases. Once it reaches the desired temp, the boiler stops heating and switches off. The system temp starts to decrease quite quickly and within a few minutes the boiler will start back up again. So essentially, my boiler is constantly turning on every 5 mins or so. Does anyone know what the issue could be? Could it be because of the faulty diverter?

Thanks in advance!

 

[ianmcd]

You dont have a diverter valve, you have either S plan 2 x Zone valves or Y plan 1 x 3 port valve, a diverter valve is a different thing