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System pressure below 0.5 bar

System pressure below 0.5 bar — Heating system pressure too low

Nibe · Air Conditioning

What does System pressure below 0.5 bar mean?

A pressure reading below 0.5 bar on the heating system gauge suggests the system may not have enough pressure to operate correctly. This could lead to insufficient heating.

Common Causes

  • Heating system needs refilling
  • Potential leak in the system

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the pressure gauge on the F730.

  2. 2

    If the pressure is below 0.5 bar, contact your installer to have the system checked and refilled.

  3. 3

    Monitor the pressure after refilling to ensure it remains stable.

Browse all codes in this manual (95)
Verified technical data. Last updated: April 2026

Related Faults

107Sensor flt: BT7 HW sens top 107 — Sensor fault: Hot water sensor151Sen flt: CL11- BT51 pool temp sensor 151 — Sensor fault: Pool temperature sensor152Sen flt: CL12- BT51 pool temper- ature sensor 152 — Sensor fault: Pool temperature sensor
Source: Nibe Air Conditioning
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