E13 High
Your boiler has detected that water is still circulating or a sensor is stuck even when the pump should be off.
Technical description: Differential water flow switch is still closed
Typical repair cost: £120-250 (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
- Circulating pump
- Hydraulic block
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