T1 Low
Your boiler is currently running a self-diagnostic check to ensure the ignition system is sparking correctly before it starts up.
Technical description: Ignition test – checking the igniter spark
Typical repair cost: £0 (including labour)
DIY fix possible
Wait for the test to complete automaticallyIf the code stays on screen for more than a few minutes, try restarting the boiler via the Reset button
Protect yourself from future repair bills
A boiler cover plan would cover faults like T1 — no call-out fees, no surprises.
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