E.04.03
Baxi fault code
Baxi E.04.03: maximum flow temperature exceeded, or flow temperature sensor short circuited
Engineer only
Baxi describes E.04.03 on Baxi Combi 2 and System 2 (200, 400, 600, 800, Assure 500) boilers as: maximum flow temperature exceeded, or flow temperature sensor short circuited.
What you can safely do
There is nothing you can safely do yourself with this one. Leave the boiler off and book an engineer.
Call a Gas Safe engineer if
- Book a Gas Safe registered engineer.
Find a Gas Safe engineer near you
Opens the official Gas Safe Register search.
Applies to: Baxi Combi 2 and System 2 (200, 400, 600, 800, Assure 500). Codes can differ between models, so check your manual.