Hi i was wondering if anyone can help. I have a halstead ace combi boiler and whenever i turn the central heating on it runs for few seconds and the power light flashes. Once resetted i then tried the dhw and that fires up perfectly and works. Its only when central heating is in demand the boiler stops running and power light flashes. Could it be the ch thermistor.
I did change the bigger diaphragm last year i believe its called flow switch diaphragm its the bigger one out of the two.
What can i check?
I did change the bigger diaphragm last year i believe its called flow switch diaphragm its the bigger one out of the two.
What can i check?