Baxi boiler — Baxi and Potterton domestic boilers that display E119 Error Codes Directory

Baxi E119 fault code: low system pressure and how to clear it

Baxi assigns E119 to low water pressure in the heating system, below the level the boiler needs to operate. It is cleared by repressurising to between 1 and 1.5 bar with the filling device fitted to the boiler, and it points to a leak only if the pressure will not stay up afterwards. Applies to: Baxi and Potterton domestic boilers that display E119 This covers Baxi and Potterton boilers whose published fault guidance lists E119. Baxi uses E118 for a related low-pressure condition on some models, so match the exact digits, and confirm the boiler model before choosing a filling method. Owner-safe checks: With the boiler off, read the gauge and, if it is low, admit water with the boiler filling device until it reads 1 to 1.5 bar cold, then close the device fully. | Keep a short note of each repressurise, the date, and the pressure before and after, so a repeat loss can be measured. Qualified technician: A pressure that will not hold, visible damp or staining, a dripping outside overflow pipe, or any expansion vessel or internal check needs a Gas Safe registered engineer.