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Static Press UNKNOWN

Static Pressure Unknown — System adjusting blower speed

Bryant · Air Conditioning

What does Static Press UNKNOWN mean?

The system cannot accurately calculate the static pressure. It is automatically reducing the blower speed to compensate.

Common Causes

  • High static pressure detected
  • Blocked air filter
  • Obstruction in ductwork

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check and clean or replace the air filter.

  2. 2

    Inspect ductwork for any obstructions.

  3. 3

    Ensure all vents and return air grilles are open and not blocked.

  4. 4

    Consider checking blower motor operation if issues persist.

Browse all codes in this manual (47)
Verified technical data. Last updated: April 2026

Related Faults

13Code 13 — Limit Circuit Lockout14Code 14 — Ignition Lockout15Code 15 — Blower Motor Lockout
Source: Bryant Air Conditioning
Open Manual (Page 13)Search more codes in this manual