Wonder if anyone can help me with this. I have fitted a new Grant oil boiler. Everything works fine if I keep the system working. If I switch the system off for more than 2 hours the Riello burner goes to lock out when it tries to start and I have to bleed the pump to get the system going again. This would suggest an air leak but I cannot find it. I have also fitted a Tigerloop (including fitting the bypass screw to the return port)
I think I have convinced myself it’s an air leak but is there anything anyone can suggest which might point to why it goes to lock out after a period of being off.
I think I have convinced myself it’s an air leak but is there anything anyone can suggest which might point to why it goes to lock out after a period of being off.