Toshiba Carrier / Toshiba Carrier 26 High Wall
Toshiba Carrier H06 error code
The Toshiba Carrier table lists H06 as outdoor low-pressure system error. It points to current, the high-pressure switch circuit, and outdoor PCB, and says a pressure sensor error or low-pressure protective operation was activated.
- Urgency
- stop use
- Verified
- Jul 31, 2026
- Fix path
- Technician
What it means
The Toshiba Carrier table lists H06 as outdoor low-pressure system error. It points to current, the high-pressure switch circuit, and outdoor PCB, and says a pressure sensor error or low-pressure protective operation was activated.
Urgency
Likely causes
- Low-pressure protective operation was activated
- A pressure sensor error is present
- The pressure switch circuit or outdoor PCB needs service
- The refrigerant circuit needs professional diagnosis
Homeowner fix
Turn the system off. Do not keep resetting it or connect gauges.
When to call a pro
Call a licensed HVAC technician for H06. Tell them Toshiba Carrier identifies H06 as low-pressure system error or pressure-sensor/protection operation.
This code points to refrigerant or sealed-system and electrical or inverter work - get repair quotes from contractors in your area.
Get repair quotesRepair vs replace
Pressure-system repairs range from sensor work to refrigerant-circuit repair. Compare replacement if a leak, compressor issue, or major outdoor board failure is confirmed on an older system.
See Toshiba Carrier mini-splitsYour Toshiba Carrier model
Toshiba Carrier 26 High Wall model pages in the Toshiba Carrier catalog help compare this repair path with current replacement options.
- 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 pressure sensor/protection operation, pressure switch circuit, outdoor PCB, current condition, and refrigerant circuit. 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 H and six 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
- Document
- Toshiba Carrier RAV High Wall 12K-36K Installation Manual, Section 14 Troubleshooting, Error codes and parts to be checked