Camray 5 Combi No hot water

[morph]

Hi Folks, i have a camray 5 combi, boiler fires up nicely, however no hot water. Radiators get hot upstairs but not downstairs. Rads have been bled did not have any air in them. pump is running but gets very hot. Boiler shuts its self off after over heating. Any top tips and handy hints would be very welcome.

 

[kevplumb]

first one would be is the pump running

might get hot but

 

[morph]

not sure, the flow pipe to the pump is hot but the pipe coming out of the pump is not. The pump is doing something but wether it is actually pushing water is debatable

 

[kevplumb]

undo the big screw in the middle and try turning the shaft

if no big screw try tapping it with a hammer
if no joy new pump

 

[morph]

Probably a stupid question but should i turn the valves off either side of the pump first?

 

[kevplumb]

probably a stupid answer
if you do whats it going to pump

 

[morph]

Undid the large screw water p****d everywhere so closed it , whacked it with a hammer. No Joy. Another stupid question what about the diverter valve could that be the problem or is it definately the pump?

 

[oilman]

It could be, but could you see the pump shaft running when the scew was out? If the water came out at more than a drip, then the shaft seals are duff, and indicates the pump is old, which indicates your system is old, which means it's probably dirty, and if you put a new pump in it might not last long.

 

[wilhelm]

take a look at the operating/installation manual, fault finding...it is very good. one of the better boiler manuals ive seen, well written and easy to follow.

 

[morph]

BIG THANKS!! to everyone that helped me, i have changed the pump everything works a treat.[/img]