6.4.1 Flame control High

Remeha 6.4.1 Flame control Fault Code

Also written as 641FLAMECONTROL — same fault.

The Remeha 6.4.1 Flame control fault code means: your boiler has failed to ignite or lost its flame during operation, and has now shut itself down for safety reasons.. It appears on 2 Remeha models in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Lock out
Typical repair cost £120-250 (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 6.4.1 Flame control fault code

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

Source

Remeha 6.4.1 Flame control 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