Quote Originally Posted by blue matt View Post
you mention the hot water is fine, so the boiler is working, still think the fuse in the heating pump would be my 1st port of call
I've Googled 'hot water no heating' and a common fault is that the veins stop spinning in the pump. It looks quite easy to test, but I'm more D.I.WHY... than DIY

She's left a message with the guy who services the boiler, so hopefully he can sort it.