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Bars bottom to top blink

Bars bottom to top blink - Pump venting function active

Wilo · Yonos PICO Pumps

What does Bars bottom to top blink mean?

The LED display shows bars running from bottom to top. This indicates that the pump venting function is active.

Common Causes

  • Pump venting function activated

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Allow the pump venting function to complete (duration is typically 10 minutes).

  2. 2

    Do not press the function key unless you need to cancel the venting process.

  3. 3

    To cancel, press and hold the function key for a couple of seconds.

Browse all codes in this manual (17)
Verified technical data. Last updated: April 2026

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Source: Wilo Yonos PICO Pumps
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