Toshiba Carrier F01 error code

What it means

The Toshiba Carrier table lists F01 as indoor heat exchanger sensor TCJ error. It says an open or short circuit has been detected and lists the TCJ heat exchanger sensor and indoor PCB as parts to check.

Urgency

Likely causes

1. The indoor heat exchanger TCJ sensor circuit is open or shorted
2. The TCJ sensor connector or harness needs service
3. The indoor PCB sensor input needs service

Homeowner fix

Power cycle once if you can do that safely. Keep the indoor unit's air path clear, but do not open the cabinet.

When to call a pro

Call a licensed HVAC technician if F01 returns. Tell them Toshiba Carrier identifies F01 as indoor heat exchanger TCJ sensor error.

Repair vs replace

Sensor faults are usually repairable. Replacement is rarely justified unless the repair also requires major board work on an old unit.

• Toshiba Carrier 26 High Wall 12,000 BTU R-454B 208/230V (RAV-HB121KRTP-UL / RAV-BP121AT2P-UL)

  Toshiba Carrier 26 High Wall

• Toshiba Carrier 26 High Wall 18,000 BTU R-454B 208/230V (RAV-HB181KRTP-UL / RAV-BP181AT2P-UL)

  Toshiba Carrier 26 High Wall

• Toshiba Carrier 26 High Wall 24,000 BTU R-454B 208/230V (RAV-HB241KRTP-UL / RAV-BP241AT2P-UL)

  Toshiba Carrier 26 High Wall

• Toshiba Carrier 26 High Wall 30,000 BTU R-454B 208/230V (RAV-HB301KRTP-UL / RAV-BP301AT2P-UL)

  Toshiba Carrier 26 High Wall

For your technician

Technician note: inspect TCJ heat exchanger sensor, sensor wiring, connector seating, and indoor PCB input for open/short detection. Page context: Toshiba Carrier maps this display to the Toshiba Carrier 26 High Wall line; source: Toshiba Carrier RAV High Wall 12K-36K Installation Manual, Section 14 Troubleshooting, Error codes and parts to be checked; display convention: match the letter F and one marker exactly before comparing neighboring codes.

Which systems show it

Toshiba Carrier 26 High Wall

Related troubleshooting

Use the symptom guide alongside the exact display code if the unit is flashing, cycling, or showing comfort symptoms.

Related codes

Source

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