Thanks to all for their help.
Problem solved by fitting new Honeywell powerhead to motorised valve (too lazy to just fit motor)
Hot water now back to normal.
Cheers
Thanks again all.
Motorized valve has power but is not turning so looks as thougfh I will have to invest in a replacement.
Apols to Tony for being numerically dyslexic - valve is 4043.
Header tank is OK so not a problem
Thanks
Manually operating the valve did not fire up the boiler so assume micro switch has not been tripped.
Does this indicate that the Honeywell valve on thehot water cylinder feed is faulty and needs replacing?
PS - valve is definitely Honeywell type V403H1106
Thanks for replies
The cylinder thermostat is correctly wired (simply replaced using existing cable and connections) so suspect motoriosed valve may be faulty - will try this when heating cools a bit.
Hi all
Need help solving a hot water problem.
Ideal Classic FF260 boiler does not fire up to provide domestic hot water but will fire up and heat radiators for central heating (but still no hot water)
I have changed cylinder thermostat and racked up to max temp but this made no difference...