CH works OK but I can't get any hot water?

Thanks both for your help. It didn't work on summer setting. will bear in mind that it could be diverter valve. However, It seems to have been fixed after a bit of fiddling! I put a long piece of flex down the top up pipe leading from the header and either it was an air lock, piece of limescale or something but after that water arriving at the immersion tank was hot and our water was getting hot. I also topped up the header tank which may have been a bit low, but certainly had plenty of water in there to my mind. I Like your idea jitparmar, hadn't thought of that and will try that if this happens again. Goodness knows how air got in or indeed limescale.
thanks for your help again.
Will

Will
January 2008

Hi, I have identical problem with Kingfisher II. I remove the thermostat stick in the boiler, turn the thermostat switch to maximum, and switch off central heating room thermostat. Let the boiler overheat, it makes hell of a noise, the upper pipe of the coil in the tank heats up first. The thermostat stick is replaced and all well until a few days later same problem and the cycle repeats. Remember when the noise starts the overflow tank will overflow and spill hot water so make sure the overflow pipe is properly connected otherwise your loaft will get wet. I feel this is due to air lock. But where does the air get in to?

jitparmar
December 2007

Will,

Sounds like your diverter valve may have stoped working - have you tried putting it into summer setting - with Hot water only ?

I am assuming its not a combi - boiler.

Divereter valves should be available from plumbers merchent and should be easy enough to replace if you have an adjustable spanner - worth draining down a bit first so you don't get too wet

Cheers

Martin
December 2007