135+ 5 Star Reviews

Sydney Wide Service

Aircon Error Codes: Toshiba

Call Now Call 1300 621 887 We’re on the Way

Toshiba Air Conditioner Error Codes: Common Codes & What They Mean

Toshiba error codes appearing on your AC unit indicate that the system has detected a fault and is protecting itself from operating under unsafe or inefficient conditions. This guide explains the most common Toshiba AC error codes in simple terms, along with the usual reasons they appear.

Important Safety Notes to Remember Before Troubleshooting

Before attempting any checks on your own:

Do not remove covers or access internal components.
Do not attempt electrical or refrigerant repairs.
If required, turn the system off at the isolator and wait for a few minutes before restarting.
If the unit trips power, comes to a sudden stop, or shows repeated faults, turn it off and arrange a professional repair service.

Stay Cool, Call the Experts Call 1300 621 887

Common Toshiba Air Conditioner Error Codes Explained

Important Note: Toshiba error code behaviours differ depending on the indoor unit model and controller type. This table covers error codes for Toshiba’s split system. A licensed technician can confirm the exact fault using the unit’s diagnostic mode

Error Code	What It Means	Common Causes
E01	The remote controller and indoor unit are not communicating
E02	The local (wired) controller is unable to send signals
E04	The indoor unit is not receiving any signal from the outdoor unit
E08	Two indoor units have been set to the same address	Incorrect address setting during installation
E18	The main indoor unit cannot communicate with connected indoor units	Communication wiring issue between indoor units
H01	The outdoor inverter compressor has drawn too much electrical current	Electrical overload, abnormal compressor operation
H06	The system has detected abnormally low refrigerant pressure	Refrigerant shortage, pressure sensor activation
P01	The indoor fan motor is not operating correctly	Fan motor failure, fan drive issue
P10	The indoor unit has detected water in the drain tray	Blocked drain line, float switch activation
P12	The indoor fan motor feedback signal is abnormal	Fan motor feedback circuit fault
P19	The system has detected an abnormal temperature change during operation	Four-way valve operation issue
C12	A general alarm has been triggered through an external control interface	External control or monitoring system fault

What Common Toshiba Error Codes Mean

Communication Errors (E01, E02, E04, E18): Errors like this come up when the system’s components cannot exchange signals reliably. Communication faults usually appear after power interruptions or if wiring connections have degraded over time.
Fan and Airflow Errors (P01, P12): If the indoor fan fails to start, runs at an unexpected speed, or stops sending feedback, the Toshiba system will shut down to prevent overheating or poor airflow.
Refrigerant and Pressure Protection (H06): Low-pressure detection is a protective feature designed to prevent compressor damage. This is an error that usually indicates the system is not circulating refrigerant correctly.
Compressor and Electrical Protection (H01): This code appears when the inverter compressor draws more current than expected. The system stops to protect major electrical components.
Drainage and Water Safety (P10): Water protection faults prevent leaks into ceilings or walls. When triggered, the system will stop until the issue is resolved.
Cycle and Valve Abnormalities (P19): This code indicates the system is not changing between cooling and heating modes as expected, usually due to valve operation issues.

When Does a Toshiba AC Error Code Need Professional Attention?

Plenty of Toshiba faults involve inverter electronics, refrigerant pressure, or communication wiring — all of which require licensed testing equipment. You should book a technician if:

The error code comes back after resetting.
The system runs for a short time, but then it shuts down.
Cooling or heating performance drops significantly.
You notice water dripping accompanied by other unusual noises.
The outdoor unit stops running.

Limited Time Only

Save Big! on Air Conditioning

Act Fast – Limited-Time Offers Ending Soon

135+ 5 Star Reviews

What Our Sydney Clients Say

At Air Care Solutions, we believe the true measure of service is in results and feedback. Many of our clients appreciate not just the outcome—but the way we work: arriving on time, explaining clearly and leaving the site as tidy as we found it.

“Professional Service You Can Trust!”

Thanks to the team at Air Care solutions for there swift response to coming out to service and fix the issues with my ducted system. There quick action, with an honest assessment with a diagnosis, were able to fix the issues quickly. Good pricing and reliable service, would highly recommend.

P

Pierce Lehane

Google Verified
“Trusted for Over 5 Years”

I have been utilising the services of Carl at Air Care Solutions for over 5 years. He installed 2 units and maintains them regularly. He responds immediately to my calls and provides an excellence service. i recommend him and his business unreservedly.

R

Renee Mill

Google Verified
“Fast Quote & Installation”

Prompt communications and inspection. Quote and installation was speedy. The guys turned up on time, and ensured all rubbish was removed. Units look great, working well.

J

Julia Nihill

Google Verified
“Exceptional Weekend Service - ”

Thanks to the team at Air Care solutions for there swift response to coming out. Exceptional, friendly service. We phoned on a Friday afternoon, had an onsite visit and quote Saturday morning, and a new air conditioning unit installed by midday Monday. Carl was very transparent with the costs involved, including any additions above the original quote. The team took great care to minimise any mess during installation, and made the whole process very simple.

R

Rachel Cooksley

Google Verified
“Honest & Easy”

The experience with Air care Solutions was honest and easy, to be installed the week before Christmas on short notice was a blessing! Lovely guys, thank you

L

Linda Merison

Google Verified

Proudly Servicing All of Sydney

From the CBD to the suburbs, we deliver expert air conditioning services Sydney-wide. No matter where
you are, our team is ready to keep you comfortable year-round.

Aircon Error Codes: Toshiba

Toshiba Air Conditioner Error Codes: Common Codes & What They Mean

Common Toshiba Air Conditioner Error Codes Explained

What Common Toshiba Error Codes Mean

When Does a Toshiba AC Error Code Need Professional Attention?

The error code comes back after resetting.

The system runs for a short time, but then it shuts down.

Cooling or heating performance drops significantly.

You notice water dripping accompanied by other unusual noises.

The outdoor unit stops running.

Save Big! on Air Conditioning

What Our Sydney Clients Say

Proudly Servicing All of Sydney

St Leonard's

Need Help Resolving a ToshibaAir Conditioner Error Code?