F31
FAULT CODE
Glow-worm
Outdoor Sensor Short Circuit
Low Severity
Engineer Required
The outdoor NTC sensor wiring has a short circuit.
Step-by-Step Fix Guide
-
Step 1 Engineer only
A Gas Safe engineer can test and replace the outdoor sensor
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.