no hot water from multi fuel stove

[Goraptor]

I have a multi fuel stove with back boiler and the water is not getting hot, it has never done this before, it is a single pipe system and all the radiators are getting hot and have been bled, I have also checked the ballcock which is ok
The water generally takes a short while to heat up with the radiators taking a little longer, any ideas what it may be.

 

[exedon2]

Have you checked there is water in feed tank for heating?

 

[Goraptor]

Have you checked there is water in feed tank for heating?

All tanks are full

 

[SimonG]

Could be an airlock in coil?

 

[Goraptor]

Could be an airlock in coil?

How would I bleed this.

 

[Best]

Any alterations to copper cylinder or pipework recently - like new cylinder?
System could be going out of water & primary flow (to heat cylinder) often is highest point of stove pipes.
Or the primary flow or return have been somehow had their proper rise & fall changed, - such as a weight put on top of a pipe. Have seen this in an attic happen. Hot water needs to rise and pipes running wrong way will prevent that and also possibly cause air locks. Some cylinders have coils that are unsuitable for gravity circulation

 

[Ric2013]

Any valves that may be shut, either manual or motorised?

I think we're all assuming the cylinder coil will be always heated and without valves because it's a backboiler system, but perhaps we shouldn't make that assumption.

 

[Lou]

Did you manage to fix your problem?