A22
FAULT CODE
Worcester Bosch
Loss of RF Signal
Low Severity
DIY Check Possible
The boiler has lost the wireless radio frequency signal from the room thermostat. The thermostat may be too far away or its batteries may be flat.
Step-by-Step Fix Guide
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Step 1
Check the batteries in your wireless thermostat and replace if needed
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Step 2
Move the thermostat closer to the boiler to improve signal strength
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Step 3
Ensure there are no large metal objects between the thermostat and boiler receiver
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Step 4
If the boiler is in a loft or garage, try wiring the receiver to a wall plate in a closer location
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.