We have a baxi 105he combo, it has just been serviced and we were having a problem with the water suddenly going freezing cold during a shower. We have had a new heat exchanger fitted and a new thermostatic valve to the shower bar, unfortunately this has not cured the problem!

Any ideas? Nb. The boiler is approximately six years old.

Many thanks

locutas, March 2014

control temp. from boiler and or sludge in plate heatexchanger

k, March 2014