What does the Viessmann 59 fault code mean?

Your boiler has stopped producing hot water because a sensor inside is giving an incorrect reading, likely due to a loose wire or a faulty component.

How much does it cost to fix Viessmann error code 59?

Typical repair cost for the Viessmann 59 fault is £120-220 including labour.

No DHW heating: Drawoff temperature sensor short circuit

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.

Safety-critical — turn off, read this.

7 signs repair isn't worth it anymore.