T3 Low
Your boiler is performing a routine check of its internal pump and may temporarily pause normal operation while it completes the test.
Technical description: Pump test – checking the basic pump
Typical repair cost: £0-80 (including labour)
DIY fix possible
Wait for several minutes as the code usually disappears automatically once the test is finishedMonitor the boiler to ensure it returns to its normal temperature displayIf the code persists for over an hour, try a simple reset using the 'Reset' button
Protect yourself from future repair bills
A boiler cover plan would cover faults like T3 — no call-out fees, no surprises.
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Parts commonly replaced
- No parts usually required
- Circulating Pump (if test fails)
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