E13 High
Your boiler has detected that a internal sensor is stuck, making the system think water is moving when it should be at rest.
Technical description: Differential water flow switch fault (still closed).
Typical repair cost: £120-220 (including labour)
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Protect yourself from future repair bills
A boiler cover plan would cover faults like E13 — no call-out fees, no surprises.
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Parts commonly replaced
- Differential pressure switch
- Internal pump
- Diverter valve
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