Symptoms	Possible Faults
No DHW	Check external controls, Please test for 230V on switch live contact
No C/H	Check external controls, Please test for 230V on switch live contact
No C/H or DHW	Check external controls, Please test for 230V on switch live contact
Boiler locks out within 10 seconds	Check pump proving switch, air pressure switch and overheat stat
Poor burner pressure	Check burner pressure/ignition adjustment pots on PCB

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