CodeRegistry
Brands
  1. Home
  2. Fujitsu
  3. Air Conditioners
  4. Poor perf - Out of temp range
About·Privacy·Terms

CodeRegistry — Your global library for technical solutions.

For your safety: always follow the equipment manufacturer’s official manuals. CodeRegistry is an independent help site and is not affiliated with the brands listed here.

Poor perf - Out of temp range

Poor cooling/heating performance — Operating outside permissible temperature range

Fujitsu · Air Conditioners

What does Poor perf - Out of temp range mean?

If the air conditioner is used outside its recommended indoor temperature and humidity ranges, the automatic protection circuit may activate, stopping or reducing its performance.

Common Causes

  • Indoor temperature or humidity is outside the specified operating range (e.g., Cooling/Dry: 64-89°F, Heating: 60-86°F, Humidity: 80% or less).

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the current indoor temperature and humidity levels.

  2. 2

    Ensure the desired operation mode (Cooling, Heating, Dry) aligns with the ambient conditions.

  3. 3

    Wait for environmental conditions to return within the permissible range for optimal unit operation.

Browse all codes in this manual (118)
Verified technical data. Last updated: April 2026

Related Faults

11Error 11 — Serial communication error (Indoor unit not sending signal)12Error 12 — Wired Remote Controller Communication Error18Error 18 — External communication error
Source: Fujitsu Air Conditioners
Open Manual (Page 14)Search more codes in this manual