- HVAC
- Air conditioner
0C
Toshiba 0C on an air conditioner: room temperature sensor TA shorted or disconnected
Risk level
Low
Usually safe to check without specialist tools.
Urgency
Low
Quick answer
On Toshiba wall-mounted splits, 0C means the room temperature sensor (TA) is short circuited or disconnected. The unit keeps running, but a technician should check the sensor and its connection.
Safety first
Stop and check this first
- This Toshiba uses R32, a flammable refrigerant, and needs dedicated tools. Toshiba says service must follow the installation manual: do not open the unit or touch the refrigerant circuit.
Safe checks you can perform
- Reading the code in remote service mode
- Power reset
- TA sensor and connection
Leave these tasks to a qualified professional
- Do not attempt this professional task: Check the sensor before the board
- Do not attempt this professional task: Clearing the code after the repair
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Check the sensor before the board
What they doThe technician follows Toshiba's order: TA sensor and connection first, board second.
They must show youthe measured sensor value.
In writingwhich part was replaced and why.
Clearing the code after the repair
What they doAfter the repair the technician clears the stored code in service mode and checks it does not return.
They must show youa reading with no code.
In writingdate and result.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Reading the code in remote service mode
- Who:
- you.
- How:
- press CHECK on the back of the remote and step with TEMP; when the stored code appears, the indoor unit beeps for 10 seconds.
- Result that matters:
- that the code is 0C.
- If it is 0C:
- the unit may keep running; Toshiba places it under the indoor board.
- If it is another:
- this page does not apply; look up that code.
- Evidence to keep:
- a photo of the remote with the code and the date.
Evidence: Toshiba service manual SVM-22103, R32 wall-mounted indoor units RAS-M05G3KVSG-E and RAS-M05G3KVSGB-E
Power reset
- Who:
- you.
- How:
- switch off and isolate the unit's power, then restore it, as Toshiba says after diagnosis.
- Result that matters:
- return to normal operation; Toshiba notes the code stays stored in memory.
- If the indicator flashes again:
- the sensor fault is still present; call a technician.
- If it does not:
- note the date; the technician can read the stored code.
- Evidence to keep:
- a note of each occurrence.
Evidence: Toshiba service manual SVM-22103, R32 wall-mounted indoor units RAS-M05G3KVSG-E and RAS-M05G3KVSGB-E
TA sensor and connection
- Who:
- an air conditioning technician.
- How:
- with power isolated, checks the TA sensor connector and measures the sensor.
- Result that matters:
- whether the sensor or its connection is faulty.
- If the sensor or connector fails:
- the cause is confirmed.
- If both are fine:
- Toshiba says to check the board.
- Evidence to keep:
- a job sheet with the measured value and photos of the connector.
Requires opening the indoor unit with power isolated: technician only.
Evidence: Toshiba service manual SVM-22103, R32 wall-mounted indoor units RAS-M05G3KVSG-E and RAS-M05G3KVSGB-E
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- HVAC
- Brand
- Toshiba
- Product type
- Air conditioner
Known code variants
- OC
- Toshiba 0C
- Toshiba OC
What it means
In Toshiba service manual SVM-22103, code 0C belongs to the indoor board block: the room temperature sensor TA is short circuited or disconnected. The unit keeps running and the indicator flashes when it is detected. Toshiba says to check the TA sensor and its connection first and, if they are fine, the board. The code does not separate sensor, connector or board: the technician does. This manual covers wall-mounted indoor units for multi-split systems.
Warnings and stop conditions
- Highsource verified
This Toshiba uses R32, a flammable refrigerant, and needs dedicated tools. Toshiba says service must follow the installation manual: do not open the unit or touch the refrigerant circuit.
Evidence: Toshiba service manual SVM-22103, R32 wall-mounted indoor units RAS-M05G3KVSG-E and RAS-M05G3KVSGB-E
Symptoms and causes
Probable causes · in order
- TA sensor shorted or openCommon
The cause Toshiba gives for 0C; confirmed by measuring the sensor off the circuit.
Evidence: Toshiba service manual SVM-22103, R32 wall-mounted indoor units RAS-M05G3KVSG-E and RAS-M05G3KVSGB-E
- TA sensor connectionPossible
Toshiba says to check the sensor and its connection; a loose connector gives the same reading as an open sensor.
Evidence: Toshiba service manual SVM-22103, R32 wall-mounted indoor units RAS-M05G3KVSG-E and RAS-M05G3KVSGB-E
- Indoor boardPossible
Only if sensor and connection are fine, as Toshiba's check order states.
Evidence: Toshiba service manual SVM-22103, R32 wall-mounted indoor units RAS-M05G3KVSG-E and RAS-M05G3KVSGB-E
Virtual technician
Does 0C still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
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