Toshiba Carrier P10 error code

What it means

The Toshiba Carrier table lists P10 as indoor water overflow. It points to the drain pipe, clogged drainage, float switch circuit, and indoor PCB, and says drainage is out of order or the float switch activated.

Urgency

Likely causes

1. The drain pipe is clogged or not draining
2. Condensate drainage is out of order
3. The float switch circuit has activated
4. The indoor PCB drain-safety input needs service

Homeowner fix

Turn the unit off if water is visible. You may check only the outside end of the drain for an obvious blockage or kink; do not open the indoor unit.

When to call a pro

Call a licensed HVAC technician if P10 returns, water is leaking, or the drain is not easy to inspect from outside. Tell them Toshiba Carrier identifies P10 as indoor water overflow.

Repair vs replace

Drain faults are usually repairable and rarely justify replacement unless water damage or multiple major failures are already present.

• 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 drain pipe, drain slope, clogging, condensate pan, float switch circuit, wiring, and indoor PCB input. 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 P and ten 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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