Low
Block 67 on Atag E22c

Your boiler has detected an unusual temperature difference between internal parts while it is idle and is temporarily pausing to prevent any potential damage.

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.

What the manual says

Manufacturer manual

A (cid:39)T has been detected between flow and return sensor whereas the burner is not in operation. After the (cid:39)T has disappeared the block will disappear.

From this model's manual
Verified against the Atag E22c Combi installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

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

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