97Fujitsu · ASTG09 / ASTG12 / AOTG09 / AOTG12 KMTC · Mini Split

Fujitsu ASTG09 / ASTG12 / AOTG09 / AOTG12 KMTC error code 97

Outdoor unit fan motor 1 error

Needs attention soon

Also written as outdoor fan, condenser fan, fan motor 1, code 97

Quick answer

On Fujitsu ASTG09 / ASTG12 / AOTG09 / AOTG12 KMTC, 97 is a fault. It means outdoor unit fan motor 1 error. A first thing to check: A failed outdoor fan motor.

Applies to: Fujitsu ASTG09 / ASTG12 / AOTG09 / AOTG12 KMTC; Fujitsu GENERAL AIRSTAGE KMTC wall split codes, indoor and outdoor · Mini Split
Type of code: Fault; Urgency: Needs attention soon
First safe check: Look at the fan through the grille and note whether it is stationary or turning slowly, because speed separates a capacitor or winding fault from a bearing fault.

Checked 2026-09-26

What 97 means on this model

The outdoor condensing fan has failed and the system has stopped. The service reference names this code for fan motor 1, so a unit with more than one outdoor fan has this code for the first one. A failed outdoor fan is not only a comfort fault: the condenser airflow is what keeps head pressure down, so it quickly turns into a high pressure or over-temperature trip, and in winter it can lead to ice on the outdoor coil. This is the outdoor counterpart to code 51, which is the indoor fan, and they are different parts in different places.

Symptoms you will notice

Code 97 and the outdoor fan does not run
The outdoor fan is noisy or hunting for speed
The system works in mild weather and fails in hot weather
The system stops with a temperature or pressure code shortly after

Common causes

The code tells you what the control detected, not which part failed. These are the causes we see most often, roughly in order of likelihood:

A failed outdoor fan motor
A seized outdoor fan bearing
A lost fan feedback signal
A loose or corroded fan motor connector
A failed output on the inverter board driving the fan
Debris jammed in the fan blade path

What you can safely check

These are homeowner-level checks. None of them need you to open a live electrical compartment or work on gas.

Look at the fan through the grille and note whether it is stationary or turning slowly, because speed separates a capacitor or winding fault from a bearing fault.
Check the fan motor connector for a loose or corroded pin.
Check the outdoor coil is clean, because a dirty coil and a slow fan produce the same symptom set.

Do not do these

×Do not reach through the grille to spin the fan with the power switch on.
×Do not run the outdoor unit with the fan disconnected to see if cooling improves. That is how the compressor gets destroyed.
×Do not replace the outdoor fan motor before checking the connector, which is the cheapest cause and the most common one after a service.

When to call a technician

Book a technician, do not keep resetting it

This fault will not clear on its own. Every power cycle gives the control one more failed attempt, and repeated attempts are what turn a cheap part replacement into a seized or contaminated system.

The refrigerant circuit is sealed and legally requires licensed handling. Opening it without certification releases refrigerant and can put the whole system in violation of regulation, so a low-pressure or high-pressure fault on this equipment is a call-out, not a weekend job.
If the appliance has stopped mid-cycle, is making a noise you have not heard before, or smells burnt, stop reading here and call. Those are symptoms of something the fault code does not describe well enough.

Watching the fan and clearing debris is reasonable for a homeowner. Motor and board work is a technician job.

What it costs to fix

Parts

Outdoor fan motor $300 to $700. Inverter board $500 to $1,200. Fan blade assembly $150 to $400.

Labor

One to three hours to diagnose and replace.

DIY or technician