52 Low

Remeha 52 Fault Code

The Remeha 52 fault code means: your boiler has detected that the external temperature sensor is reading below its minimum operating range, likely due to a cable fault or a faulty sensor unit.. It appears on 1 Remeha model in our database.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description: Outside temperature min. set point
Typical repair cost £100-200 (including labour)

Engineer required

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

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

Remeha models that show the 52 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Remeha 52 fault code information on this page is sourced and cross-checked against the official Remeha service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026