Low
AM019 on Baxi 400 Combi 2

Your boiler is simply displaying the current water pressure reading in your heating system, rather than indicating an actual fault.

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

Actual water pressure in central heating system bar

Shared across the 400 Combi 2 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

Check the pressure gauge on the front or underside of the boiler.Verify the reading is between 1.0 and 1.5 bar while the heating is off.If the reading is normal, press the reset button to return to the standard display.

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Related fault codes

E119View →E118View →

All 110 fault codes on the 400 Combi 2

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

A.00 .28A.00 .29A.00.34A.02 .37A.02 .45A.02 .46A.02 .48A.02 .49A.02 .54A.02 .76A.02.06A.02.36A.02.55AM001AM010AM011AM012AM014AM015AM016AM018AM024AM027AM036AM037AM040AM091AM101AP073AP079BM000CM030CM120CM190CM210CM280CP000CP020CP210CP230CP470CP480CP490CP780DM001DM002DM005DM009DM019DM029DP430DP440E.00.04E.00.05E.00.16E.00.17E.00.20E.00.21E.01.04E.01.12E.01.17E.01.20E.02 .13E.02 .35E.02 .39E.02 .47E.02.17E.04 .29E.04 .54E.04.01E.04.02E.04.03E.04.08E.04.10E.04.12E.04.13E.04.17E.04.18E.04.23GM001GM002GM003GM004GM007GM008GM012GM013GM044H.00 .81H.00.42H.01.00H.01.05H.01.08H.01.14H.01.18H.01.21H.02 .70H.02.00H.02.02H.02.03H.02.04H.02.05H.02.07H.02.09H.02.10H.03 .54H.03.00H.03.02H.03.05

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