How much does it cost to fix boiler error code dd?

Typical repair cost for the boiler dd fault is £90-180 including labour.

dd Low

Boiler Fault Code dd

Also written as DD — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 31 August 2026

Fault code dd appears across 2 boiler brands and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is temporarily unable to read the temperature of your main heating area because a connection to its temperature sensor has come loose or broken. (As reported on Viessmann Vitodens 242-F FB2B)

Pick your boiler brand for the dd fix

Ariston dd 1 model Viessmann dd 1 model

Source

Information for the dd fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026