RED LIGHT STEADY
FAULT CODE
Grant
UV Sensor / Gas Valve Fault (Vortex Blue)
High Severity
Engineer Required
On Grant Vortex Blue oil burners, a steady red light indicates the UV sensor is defective or dirty, or the oil valve has a fault.
Step-by-Step Fix Guide
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Step 1
Turn off the boiler
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Step 2 Engineer only
Call an OFTEC registered engineer to clean or replace the UV sensor and check the oil valve
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.