How much does it cost to fix Ideal error code T1/T2?

Typical repair cost for the Ideal T1/T2 fault is £120-250 including labour.

T1/T2 High

Ideal T1/T2 Fault Code

Q: What does the Ideal T1/T2 fault code mean?

Your boiler's internal thermostat or control wiring has lost connection, preventing the heating from firing up.

Also written as T1T2 — same fault.

The Ideal T1/T2 fault code means: your boiler's internal thermostat or control wiring has lost connection, preventing the heating from firing up.. It appears on 1 Ideal model in our database.

Technical description: Dry contact of the stage 1 boiler thermostat / Insert in the control circuit of boiler stage 1

Typical repair cost £120-250 (including labour)

Engineer required

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

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Ideal models that show the T1/T2 fault code

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

Falcon Gte Repair: £120-250

Source

Ideal T1/T2 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