Low
105 on Atag iC28

Your boiler is currently running a seven-minute self-cleaning cycle to remove air bubbles from the pipes after the system pressure was 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. This will last for approx 7 mins. (triggered if pressure was below 0.7 bar)

Community-sourced, unverified
We could not tie this code to a specific manual. Treat it as indicative only.
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 7 minutes for the boiler to complete its automatic air-removal cycleCheck the pressure gauge is between 1.0 and 1.5 barIf the code returns, top up the water pressure using the filling loop

Find a Gas Safe engineer
Search the official register →
Boiler cover options

Avoid the next call-out bill

Monthly cover means no unexpected bills when your boiler breaks down.

Approved partner
Domestic Appliance Guard
Unlimited call-outs, 24/7 helpline, no price-hike promise
Get a quote →

Affiliate links. We may earn a commission at no extra cost to you.

Related fault codes

118View →117View →

All 18 fault codes on the iC28

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

102040506178110111117118119129133151154180181

Related guides you might find useful

Boiler keeps losing pressure

Six most common causes of dropping pressure.

Read →

Low pressure — repressurise guide

Step-by-step using the filling loop.

Read →

Is boiler cover worth it?

Break-even maths on monthly cover.

Read →