Appliance Repair Questions? Ask a Technician for Answers ASAP
If the sensor has been replaced then you are almost there
If it is reading correctly then the plate heat exchanger must be up to temperature
The problem must be in the heat transfer between the boiler circulating water and the cold water
It looks like your plate heat exchanger is scaled up internally, you should get this cleaned to solve your problem
Hello, thanks for the reply. Would it be easier/wiser to replace the heat exchanger ?