What does the Worcester Bosch Blue indicator light off fault code mean?

Your boiler has no power and is completely switched off, meaning you have no heating or hot water until the electrical supply is restored.

How much does it cost to fix Worcester Bosch error code Blue indicator light off?

Typical repair cost for the Worcester Bosch Blue indicator light off fault is £0-120 including labour.

Check that the main boiler power switch (usually a fused spur near the boiler) is turned to the ON position.

The appliance is switched off via the master switch or there is no power supply to the appliance.

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

Work through these before the call-out.

Almost always a stuck diverter valve on combis.

Safety-critical — turn off, read this.