E50 — Hot Water sensor Fault

What does E50 mean?

This code indicates a fault with the Hot Water NTC (Negative Temperature Coefficient) sensor, which measures the domestic hot water temperature. The boiler display will show 'E' alternating with '50'. This usually means the sensor or its wiring is defective, affecting hot water production.

• Faulty Hot Water NTC sensor.
• Damaged wiring to the Hot Water NTC sensor.
• Loose connection at the Hot Water NTC sensor.

Click steps to track your progress.

1. 1

   Note the error code E50 from the boiler display.

2. 2

   Ensure the electrical supply to the boiler is stable (230V ~ 50Hz).

3. 3

   Check if opening a hot water tap has any effect on the display.

4. 4

   Contact a qualified heating engineer, informing them of the E50 error code.