What does the Baxi E12 fault code mean?

Your boiler is struggling to detect water flow or pressure, so it has safely shut itself down to prevent damage.

How much does it cost to fix Baxi error code E12?

Typical repair cost for the Baxi E12 fault is £120-250 including labour.

Check your boiler pressure gauge; if it is below 1 bar, use the filling loop to top the system up to between 1 and 1.5 bar

Differential pressure switch (no water or air in system)

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Almost always a stuck diverter valve on combis.

Six most common causes of dropping pressure.

7 signs repair isn't worth it anymore.