What does the Worcester Bosch H11 fault code mean?

Your boiler is having trouble accurately measuring the temperature of your hot water, so it may not heat up as consistently as it usually does.

How much does it cost to fix Worcester Bosch error code H11?

Typical repair cost for the Worcester Bosch H11 fault is £120-200 including labour.

Hot water outlet sensor defect, hot water can still be delivered but with less control (sensor open/short circuit or out of position)

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.