E321
Baxi fault code
Baxi E321: hot water temperature sensor fault (also shown as 163)
Engineer only
Baxi describes E321 on Platinum, Duo-tec, EcoBlue, Megaflo, Assure, Main Eco and original 600/800 boilers as: hot water temperature sensor fault (also shown as 163).
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: Platinum, Duo-tec, EcoBlue, Megaflo, Assure, Main Eco and original 600/800. Codes can differ between models, so check your manual.