AL 27
FAULT CODE
Sime
Compatibility Error (Alarm 27)
High Severity
Engineer Required
The PCB configuration does not match the boiler hardware.
Step-by-Step Fix Guide
-
Step 1 Engineer only
A Gas Safe engineer should check the PCB configuration
Gas Safe Reminder
Work on gas appliances must be carried out by a Gas Safe registered engineer. The steps above cover safe checks a homeowner can perform - any internal component replacement requires a qualified professional. If in doubt, always call an engineer.