Daikin Air Conditioner Error Code A6

A6 on a Daikin air conditioner indicates an indoor unit fan motor abnormality. Specifically, it means the fan revolution speed is not increasing even though the controller has pushed the output voltage to its maximum level. The system shuts down to prevent coil damage or further harm to the unit. The fault must be diagnosed and corrected before normal operation can resume.

No, you should not attempt to bypass or ignore the A6 fault. The error code triggers a protective lockout because the fan motor is not moving enough air across the evaporator coil. Continuing to operate the unit in this state can cause the coil to freeze over, stress the compressor, or damage the motor and control board further. Leave the unit off until the fault is resolved.

Repair costs vary depending on the root cause. Clearing a simple obstruction or reseating a harness connector involves little to no parts cost, though a service call fee typically applies. Replacing the indoor fan motor generally runs in the range of $150 to $450 including parts and labor, while a control board replacement can range from $250 to $600 or more depending on the model. Getting a diagnosis from a certified technician will clarify exactly which component has failed.

Some causes of the A6 error are accessible to a knowledgeable DIYer. After turning off power and waiting 10 minutes, you can inspect the fan area for obstructions and check that the motor harness connector is fully seated. If the fault is due to a failed motor, a loose fan blade, or a faulty control board, those repairs are best handled by a qualified technician who can safely access internal components and test electrical values.

A power reset may temporarily clear the A6 code, but it will return if the underlying cause is not corrected. Turning off power and waiting 10 minutes is actually the recommended first diagnostic step, not just a reset. If the error reappears after the restart, there is a real mechanical or electrical fault with the fan motor system that requires inspection and repair.