High
213 on Worcester Bosch Greenstar 2000

Your boiler has sensed that heat is not moving through the system properly, causing the water going out to be much hotter than the water coming back in.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description

Temp difference between supply and return exceeding limit

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Related fault codes

212View →214View →

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