E36 High
Your boiler has lost its ability to measure the temperature of the water leaving the unit, meaning it cannot operate safely and has shut down.
Technical description: Flow thermistor open circuit – check/replace connections/thermistor
Typical repair cost: £100-£190 (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 E36 — no call-out fees, no surprises.
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Parts commonly replaced
- Flow thermistor (NTC sensor)
- Wiring harness connector
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