50 — NTC domestic hot water sensor faulty (heating only model with storage boiler)

What does 50 mean?

The NTC sensor for domestic hot water (DHW), used specifically in heating-only models with a storage boiler, is defective or has a wiring problem.

• Faulty NTC DHW sensor
• Broken or shorted sensor wiring

Click steps to track your progress.

1. 1

   Press and hold down the Reset button for 2 seconds to try clearing the fault.

2. 2

   Ensure the boiler's power supply is stable.

3. 3

   If the fault persists, contact an Authorised Service Centre to check the sensor and wiring.