Hello guys advice needed.
Combi boiler fires up burner lights comes on for about 20 seconds and then goes off, this is followed by a L1 fault... in ch and hw mode.
System pressure ok
Flow thermistor 14kohms at room temp
Return thermistor 14kohms at room temp.
Pump seems to operate, can only check by touching it as it is an A rated pump with no front screw.
Flow return valves areopened the boiler flow pipe within the combustionchamber doesnt really get hot.
When boiler operates itseems to modulate up and then down before shuttingoff with the L1 fault.. I am thinking possible week pump but as it’s nearly£300 I need to be sure....any suggestions
Combi boiler fires up burner lights comes on for about 20 seconds and then goes off, this is followed by a L1 fault... in ch and hw mode.
System pressure ok
Flow thermistor 14kohms at room temp
Return thermistor 14kohms at room temp.
Pump seems to operate, can only check by touching it as it is an A rated pump with no front screw.
Flow return valves areopened the boiler flow pipe within the combustionchamber doesnt really get hot.
When boiler operates itseems to modulate up and then down before shuttingoff with the L1 fault.. I am thinking possible week pump but as it’s nearly£300 I need to be sure....any suggestions