E50 Medium
Your boiler's temperature sensor for hot water has developed a fault or a loose connection, meaning the system cannot accurately measure how hot the water is.
Technical description: Domestic hot water (DHW) negative temperature coefficient (NTC) sensor (tank boiler) (s.c) or DHW NTC sensor (tank boiler) (o.c.) Fault
Typical repair cost: £90-160 (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 E50 — no call-out fees, no surprises.
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Parts commonly replaced
- DHW NTC thermistor sensor
- Wiring harness
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