Red (Connectivity) Medium

Ideal Red (Connectivity) Fault Code

Also written as REDCONNECTIVITY — same fault.

The Ideal Red (Connectivity) fault code means: your smart thermostat has lost its wireless connection to the boiler, meaning you cannot control your heating remotely or via the wall unit.. It appears on 1 Ideal model in our database.

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description: No connection

What causes the Ideal Red (Connectivity) fault?

This fault occurs when the radio frequency link between your thermostat and the smart interface plugged into the boiler is interrupted. The most common reasons are physical obstructions like new furniture or thick walls blocking the signal, or electronic interference from other household devices.

Typical repair cost £0-90 (including labour)

DIY fix possible

Check that your home Wi-Fi router is switched on and working correctly.Ensure the Halo Smart Interface (the white box plugged into the boiler) has power and is not obstructed.Navigate to the 'Settings' menu on the Halo unit and select 'Pairing Mode' to reconnect the device to the interface.

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Ideal models that show the Red (Connectivity) fault code

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

Source

Ideal Red (Connectivity) fault code information on this page is sourced and cross-checked against the official Ideal service / installation manuals for each affected model.

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