E1-66 Medium
Your boiler is struggling to automatically adjust its internal settings for the burner to stay lit and is attempting to restart itself.
Technical description: Calibration condition error, wait for burner to restart
Typical repair cost: £100-250 (including labour)
DIY fix possible
Reset the boiler using the front control panelWait for the boiler to complete its automatic recalibration sequenceEnsure the gas supply to the property is active
Protect yourself from future repair bills
A boiler cover plan would cover faults like E1-66 — no call-out fees, no surprises.
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Parts commonly replaced
- Gas valve
- Ionisation electrode
- Control PCB
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