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LED off

actoSTOR module LED off - No power supply

Vaillant · ecoTEC plus Boilers

What does LED off mean?

The status LED on the actoSTOR module is off, which means the module is not receiving any power. Without power, it cannot function or communicate with the Vaillant Ecotec Plus Boilers.

Common Causes

  • No power supply to the actoSTOR module.
  • A disconnection in the cable harness or internal wiring.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the main power supply to your Vaillant Ecotec Plus Boilers to ensure it is on.

  2. 2

    Verify all cables connected to the actoSTOR module are securely fastened.

  3. 3

    Inspect the module's power cable for any visible damage or loose connections.

  4. 4

    If power seems to be present and connections are good, a deeper electrical fault may exist, requiring professional service.

Browse all codes in this manual (100)
Verified technical data. Last updated: April 2026

Related Faults

F.0F.0 — Flow–NTC open circuitF.1F.1 — Return–NTC open circuitF.10F.10 — Flow NTC short circuit
Source: Vaillant ecoTEC plus Boilers
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