Toshiba Carrier F31 error code

What it means

The Toshiba Carrier table lists F31 as outdoor unit PCB error and identifies it as an outdoor PCB EEPROM error.

Urgency

Likely causes

1. The outdoor PCB EEPROM is not reading normally
2. The outdoor control board has an internal memory fault
3. Power or connector issues at the outdoor PCB need service

Homeowner fix

Power cycle once only if you can do that safely. Do not open the outdoor unit or touch electronics.

When to call a pro

Call a licensed HVAC technician if F31 returns. Tell them Toshiba Carrier identifies F31 as outdoor PCB EEPROM error.

Repair vs replace

Outdoor board repair can be reasonable on a newer system. Compare replacement if an older out-of-warranty system needs major outdoor electronics.

• 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: verify outdoor PCB power/connectors and diagnose EEPROM or outdoor PCB failure per the service procedure. 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 thirty 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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