Worcester Bosch 28cdi boiler releasing steam !

[adam787_1]

Hi all,

I'm new here so go easy on me!

I have a Worcester Bosch 28cdi, it works fine for most of the time but every now and again (once a month) the Rads and hot water stop working and the boiler releases lots of steam from a small valve at the top. That normally goes on for a few mins the lights flash on the boiler, I then press the reset button and everything seems to start working again. There doesn't seem to be any problem with the pressure in the system.

Any ideas why this is happening?

Thanks in advance.
Adam

 

[solo]

Pump sticking.