What does the Worcester Bosch 1021 fault code mean?

Your boiler is struggling to accurately detect the temperature of your hot water, which means it may fail to heat your water or work inconsistently.

How much does it cost to fix Worcester Bosch error code 1021?

Typical repair cost for the Worcester Bosch 1021 fault is £120-200 including labour.

Cylinder charging or hot water temperature sensor faulty

Sensor failure

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

Almost always a stuck diverter valve on combis.

Safety-critical — turn off, read this.

Break-even maths on monthly cover.