E33 Medium
Your boiler is having trouble measuring the temperature of your hot water because of a faulty internal sensor or a wiring issue.
Technical description: Domestic hot water (DHW) sensor short circuit – check connections to DHW sensor are in place
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 E33 — no call-out fees, no surprises.
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Parts commonly replaced
- DHW Thermistor (NTC Sensor)
- Wiring harness
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