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SERVICE Flashing 1 sec. on; 1 sec. off

SERVICE LED - Flashing (1 sec on, 1 sec off)

Lennox · PRODIGY 2.0 Unit Controller

What does SERVICE Flashing 1 sec. on; 1 sec. off mean?

The red SERVICE LED is flashing, indicating the node is not configured or an application has not been loaded.

Common Causes

  • Node is not configured
  • Application not loaded onto the node

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Configure the node through the appropriate interface.

  2. 2

    Ensure the correct application software is loaded onto the node.

  3. 3

    Refer to the installation or configuration guide for specific instructions.

Browse all codes in this manual (56)
Verified technical data. Last updated: April 2026

Related Faults

12Alarm 12 - High Pressure Switch S414Alarm 14 - High Pressure Switch S716Alarm 16 - High Pressure Switch S28
Source: Lennox PRODIGY 2.0 Unit Controller
Open Manual (Page 97)Search more codes in this manual