Hot water and no heating

[bigphil]

Hello
My combi boiler (chaffoteaux britony) is giving me hot water but no central heating. The pressure gauge shows 2 bar and i have not touched it. The boiler fires up for about 20 seconds and then shuts down. All radiators in the house have been bled. Althoug i would love to get a plumber in my problem is i dont have much money. Is this something i could fix myself with my basic plumbing skills. Thanks in advance

 

[Rob]

Probably the diverter valve. Back left corner at the bottom. Try giving it a tap to free it up.

If it needs replacing i would recommend you get someone in, not a nice job!