Greenstar Boiler Not Working

[compressorman]

I have a green star ten yrs old keeps increasing pressure, feel on off filling valve not working, drain off to recommended, but after few days it's increased whilst cold...is this a regular problem.

 

[Lou]

Hi, Thanks for joining the forum. I have popped this in the Central Heating forum.

Have you got any error messages or anything? Could you supply a photo?