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F28

F28 / Outdoor LED1 flashes 19 times — Module PWM select circuit error / Compressor position detection circuit fault

Haier · Air Conditioners

What does F28 mean?

There's an error in the Pulse Width Modulation (PWM) selection circuit or the compressor's position detection circuit, affecting its precise operation and control.

Common Causes

  • Power module issue
  • Outdoor PCB issue
  • Compressor issue

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn off the air conditioner at the main power switch or circuit breaker.

  2. 2

    Wait for at least 30 seconds, then turn the power back on.

  3. 3

    If the error persists, contact a qualified technician.

Browse all codes in this manual (48)
Verified technical data. Last updated: April 2026

Related Faults

CL displayCL displayed on panel & remote — Self-Clean operation activatedE1E1 — Indoor temperature sensor failureE14E14 — Indoor fan failure
Source: Haier Air Conditioners
Open Manual (Page 149)Search more codes in this manual