F6
FAULT CODE
Ideal
Outside Sensor Fault
Low Severity
Engineer Required
The external temperature sensor (used for weather compensation) is faulty or not connected. This does not affect heating safety but may affect efficiency.
Step-by-Step Fix Guide
-
Step 1
If you have a weather compensator fitted, check the external sensor cable is connected
-
Step 2 Engineer only
If no external sensor is fitted, an engineer may need to disable this feature in the boiler settings
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.