Hot water has not been as warm as usual - this has been noticed over a
2 week period. 2 days ago the water was only lukewarm. The
thermacouple, pump and 2 way valve have been replaced as there has been
a bit of noise. The system is working perfectly except that we still
have no hot water - not even lukewarm. Our system is an ideal
standard. Any ideas on how to resolve this problem would be
appreciated.

"margaret" wrote in message
ups.com...
Hot water has not been as warm as usual - this has been noticed over a
2 week period. 2 days ago the water was only lukewarm. The
thermacouple, pump and 2 way valve have been replaced as there has been
a bit of noise. The system is working perfectly except that we still
have no hot water - not even lukewarm. Our system is an ideal
standard. Any ideas on how to resolve this problem would be
appreciated.


You need to work through the sequence of events. When you turn a tap on,
does the burner light? I presume the pilot light is lit. Does this boiler
run your CH too? I presume it does since you have a two way valve. If the CH
is getting hot then the gas burner and gas valve etc must all work. Then you
have to ask what happens differently when the hot water is demanded. There
will be a flow sensor that senses water being drawn by a tap. If that
doesn't work your boiler won't try and heat the tap water. There will be an
overheat thermistor screwed into the hot water after it leaves the heat
exchanger can, if that is wrongly sending an 'overheat' signal the boiler
won't heat the water: its connections and resistance needs checking. There
are a variety of problems it could be, including a duff control pcb. You
need to eliminate the simpler ones first.

Are you intending to diagnose it yourself?

Andy.

On Sun, 31 Dec 2006 15:02:15 -0800, margaret wrote:

Hot water has not been as warm as usual - this has been noticed over a
2 week period. 2 days ago the water was only lukewarm. The
thermacouple, pump and 2 way valve have been replaced as there has been
a bit of noise. The system is working perfectly except that we still
have no hot water - not even lukewarm. Our system is an ideal
standard. Any ideas on how to resolve this problem would be
appreciated.

I suspect that you have a system with a HW cylinder.
Since the 2 way (3 port ) valve and pump have been changed (probably
without need?) I suggest that the programmer/timer and the cylinder
thermostat are up for testing.




--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at http://www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html
Choosing a Boiler FAQ http://www.makewrite.demon.co.uk/BoilerChoice.html
Gas Fitting Standards Docs he http://www.makewrite.demon.co.uk/GasFittingStandards