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Low room temperature

Low room temperature

NIBE · F750 Heat Pump

What does Low room temperature mean?

The indoor temperature is lower than desired, indicating that the heat pump is not effectively heating the living spaces. This problem typically does not trigger a display alarm.

Common Causes

  • Thermostats in multiple rooms are closed or set too low.
  • The heat pump is in an incorrect operating mode, preventing adequate heating.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify that the thermostats in all relevant rooms are open or set to your desired temperature.

  2. 2

    Refer to the 'Saving tips' section in the User manual for guidance on optimal thermostat settings.

  3. 3

    Check the heat pump's operating mode in menu 4.2 to ensure it is set for active heating.

Browse all codes in this manual (18)
Verified technical data. Last updated: April 2026

Related Faults

Additional heat blocked symbolAdditional heat blocked symbol displayed — Additional heat is not availableAlarm persists after resetRed status lamp and 'alarm' menu remain after reset — Problem not resolvedBoiler Dry Start DamageDamaged Components — Temperature limiter, thermostat, or immersion heater damaged
Source: NIBE F750 Heat Pump
Open Manual (Page 62)Search more codes in this manual