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165

Low pressure, climate system 165 — Low pressure in the climate system

Nibe · Air Conditioning

What does 165 mean?

There is low pressure in the climate system. This is usually due to a leakage in the heating system or not enough water in the system.

Common Causes

  • Leakage in the heating system
  • Not enough water in the heating system

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the heating system for leaks.

  2. 2

    Ensure the system has the correct amount of water.

  3. 3

    Bleed any trapped air from the system.

  4. 4

    Add water if the level is too low.

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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