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Hot water symbol (periodic increase or lux mode)

Hot water symbol displayed — Periodic increase or lux mode for hot water is active

Nibe · SHB 20

What does Hot water symbol (periodic increase or lux mode) mean?

This symbol appears when a special mode for hot water is activated, such as a periodic increase in temperature or a 'lux' mode.

Common Causes

  • Hot water periodic increase is activated
  • Hot water lux mode is activated

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Refer to menu 2.1 for 'periodic increase' settings.

  2. 2

    Refer to the user manual for details on 'lux' mode activation and deactivation.

  3. 3

    Adjust settings in menu 2 if you wish to change the hot water schedule or disable these modes.

Browse all codes in this manual (15)
Verified technical data. Last updated: April 2026

Related Faults

Additional heat blocked symbolAdditional heat blocked symbol — Auxiliary heat prevented from runningAlarm bell appearsAlarm bell appears on display — System malfunction alertCompressor blocked symbolCompressor blocked symbol — Compressor prevented from running
Source: Nibe SHB 20
Open Manual (Page 43)Search more codes in this manual