Please select from one of the links below which type of XSol diagnostic procedure you require:
XSOL DIAGNOSIS FROM START SEQUENCE
This option will take you through the functional operation of the appliance.
XSOL DIAGNOSIS OF LOCKOUT
This option will investigate why the red lockout LED is illuminated.
If boiler is stuck in lockout (reset button not working) then click HERE
If in doubt use diagnosis from start sequence.