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151

Sen flt: CL11- BT51 pool temp sensor 151 — Sensor fault: Pool temperature sensor

Nibe · Air Conditioning

What does 151 mean?

The input for the pool temperature sensor (BT51) is receiving an unreasonably high or low value for longer than 5 seconds. This causes the pool pump to stop.

Common Causes

  • Sensor not connected
  • Open-circuit or defective sensor

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the BT51 pool temperature sensor connection.

  2. 2

    Inspect the sensor for damage.

  3. 3

    Test the sensor's readings.

  4. 4

    Replace the sensor if faulty.

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 sensor152Sen flt: CL12- BT51 pool temper- ature sensor 152 — Sensor fault: Pool temperature sensor154 403Sensor fault from PCA 154 403 — Compressor is blocked: Outdoor unit sensor fault
Source: Nibe Air Conditioning
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