How much does it cost to fix Baxi error code E.00 .05?

Typical repair cost for the Baxi E.00 .05 fault is £120-200 including labour.

E.00 .05 High

Baxi E.00 .05 Fault Code

Q: What does the Baxi E.00 .05 fault code mean?

Your boiler has stopped working because it is unable to accurately measure the temperature of the water returning to it, likely due to a loose wire or a faulty sensor.

Also written as E0005 — same fault.

The Baxi E.00 .05 fault code means: your boiler has stopped working because it is unable to accurately measure the temperature of the water returning to it, likely due to a loose wire or a faulty sensor.. It appears on 8 Baxi models in our database.

Technical description: Return temperature sensor short circuited SENSOR/CONNECTION PROBLEM Check the operation of the sensor Check the sensor/PCB connection

Typical repair cost £120-200 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

Boiler cover options

Avoid the next call-out bill

A cover plan would handle faults like E.00 .05: no call-out fees, no surprise bills.

Approved partner

Domestic Appliance Guard

Unlimited call-outs, 24/7 helpline, no price-hike promise

Get a quote →

Affiliate links. We may earn a commission at no extra cost to you.

Baxi models that show the E.00 .05 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Baxi E.00 .05 fault code information on this page is sourced and cross-checked against the official Baxi service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026