Low
105 on Atag iC28

Your boiler has automatically started a special air-clearing cycle because the water pressure recently dropped too low.

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

De-aeration program will start after the installation has been refilled and if the pressure was below 0.7 bar

From this model's manual
Verified against the Atag/Atag Ic28 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.

DIY fix possible

Wait for the automatic de-aeration program to finish its cycle.Check your system pressure gauge to ensure it is sitting between 1.0 and 1.5 bar.If the pressure is still low, top up the system using the filling loop.

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Related fault codes

104View →106View →133View →

All 18 fault codes on the iC28

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

102040506178110111117118119129133151154180181

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