Heating set to off, but Radiators ON!?

[mummy2joseph]

his morning I woke up really hot, Got up and felt the radiators and they where on!.. Knowing that both me or my partner hadn't turned them on last night I went to check out the boiler (combi) to see what it was playing at, and it is set to off, (normally if it is on twice/constant/timed there will be a light that lights up next to each option if chosen!) Nothing, my boiler was set to OFF as I thought.. But my radiators are on!.. I have turned them off but there is one radiator you can't turn off so I still have my gas draining as I type...

Anyone got any solutions?! Can I do something myself or will I HAVE to call someone out?

The boiler is British Gas C1

Thanks

 

[ianniann]

I've seen this with a sticking diaphragm which makes the boiler think it needs to supply hot water. Since there isn't actually any hot water flowing, the heat just goes to the radiators.