Low
181 on Atag iC Range

This is a normal operational message and not an actual fault; it simply appears for a moment when the boiler finishes its initial setup or test sequence.

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

No error — briefly visible when leaving commissioning mode

Shared across the iC Range range
This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

No action is required as the code will disappear on its own.Wait for the boiler to return to its normal display screen.Resume normal use of your heating and hot water.

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All 33 fault codes on the iC Range

Seeing a different code? Every code this model can display, in one place.

1P4102040506178101102104105108109110111112114117118119129133140151154180201203303304501612

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