Toshiba Carrier L08 error code

What it means

The Toshiba Carrier table lists L08 as indoor group address not set. It says the indoor address group is not set.

Urgency

Likely causes

1. The indoor group address was not assigned
2. Controller or indoor address setup was incomplete
3. The indoor PCB is not reporting a valid group address

Homeowner fix

Power cycle once if you can do that safely. Do not change controller address settings.

When to call a pro

Call a licensed HVAC technician if L08 returns. Tell them Toshiba Carrier identifies L08 as indoor group address not set.

Repair vs replace

This is normally a setup correction, not a replacement decision.

• 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: set and verify indoor group address and confirm the indoor PCB reports the configured address correctly. 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 L and eight 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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