I have been reading posts and understand that a scaled or sludged up heat exchanger can cause poor heat output from the radiators in general due to the water in the boiler not getting hot enough, due to the scale/sludge.
How is this so? Surely if anything it would make the water going through the boiler hotter as the scale/sludge in the heat exchanger walls would stop the thermostat / thermistor reading the temperature accuartely and as quickly as it should do?
How is this so? Surely if anything it would make the water going through the boiler hotter as the scale/sludge in the heat exchanger walls would stop the thermostat / thermistor reading the temperature accuartely and as quickly as it should do?