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BLOWER ON - OAS

Display Message - BLOWER ON - OAS

Lennox · PRODIGY 2.0 Unit Controller

What does BLOWER ON - OAS mean?

The indoor blower is operating, and the outdoor air is suitable for free cooling.

Common Causes

  • Heating or cooling demand requires airflow
  • Outdoor air conditions are favorable for free cooling

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    This is a normal operational status.

  2. 2

    The system may be utilizing free cooling.

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