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NO DEMAND

Display Message - NO DEMAND

Lennox · PRODIGY 2.0 Unit Controller

What does NO DEMAND mean?

The system is not currently receiving a signal for heating or cooling.

Common Causes

  • Thermostat is not calling for heating or cooling
  • Setpoints are met

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check thermostat settings and setpoints.

  2. 2

    Ensure the thermostat is properly connected and powered.

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