Low
1.W3 on Worcester Bosch Greenstar Heatslave II

Your boiler is struggling to read the outdoor temperature sensor, so it is using a default setting to keep your home warm.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description

Weather Compensation Functionality - Point B(@+20°C)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Related fault codes

1.W1View →1.W2View →

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