Combi no central heating flow

[Rich_Pontypool]

My Chaffoteaux Britony 80 Combi has no heating flow. The hot water is fine. The central heating fires up ok but after a couple of mins it shuts down (saftey cut off i guess) the pump is turning but there is no flow from the combi. Can anyone help? Thanks

 

[kevplumb]

just cos the pump is turning dont mean the impeller is they do come off now and then

 

[breezer]

come off? when the bg man (*** contract) took our pump apart the impellar was all smashed to pieces (no he didn't do it, it was one of the few times i watched)

 

[vangard63]

check the right hand c.heating pipe it prob. gets hot.
div. valve stuck std problem.
fully pumped system no pump no hot water either.