In brief
Fault code P10 on Toshiba Cassette / Ducted means: Fault code P10 appears on units with a condensate pump (cassette, ducted) when the safety float switch detects a critical water level in the drip tray. Most common cause: Blocked drain hose, faulty or unpowered condensate pump, float switch stuck in the high position due to debris. First action: Check if the drip tray is full of water.. Call a registered engineer if the fault returns after basic checks or involves refrigerant work (F-Gas registered engineer required).
According to the Toshiba Cassette Installation Manual, the P10 fault code triggers a complete unit shutdown to prevent water damage.
P10 • Toshiba • Cassette / Ducted
Fault code P10 Toshiba: Condensate pump fault
Fault code P10 appears on units with a condensate pump (cassette, ducted) when the safety float switch detects a critical water level in the drip tray.
Source: Toshiba Cassette Installation Manual
Ask Marcel Team
Certified HVAC technicians
Written and field-validated by heat-pump, air-con and heating installers. Cross-checked against more than 50,000 documented fault sheets.
What does fault code P10 on Toshiba mean?
Fault code P10 appears on units with a condensate pump (cassette, ducted) when the safety float switch detects a critical water level in the drip tray.
Blocked drain hose, faulty or unpowered condensate pump, float switch stuck in the high position due to debris.
Symptoms
- Complete unit shutdown to prevent water damage
- Possible pump noise
- Flashing P10 code
Diagnosis
1. Inspect condensate drip tray
- Check if the drip tray is full of water.
- Clean the drip tray and float switch (often gummed up by algae/biofilm).
2. Test pump
- Check if the pump is powered and if it vibrates.
- Ensure the drain hose is not kinked or blocked.
How to reset fault code P10 on Toshiba?
Clean the drain circuit and float switch. Replace the condensate pump if burnt out.
When should you call an F-Gas engineer?
Fault code P10 most often occurs during cooling operation, especially on Cassette / Ducted units. Complete unit shutdown to prevent water damage.
Field context
Fault code P10 most often occurs during cooling operation, especially on Cassette / Ducted units. Complete unit shutdown to prevent water damage.
Frequently asked questions
Can I use the air conditioning with P10?
No, the unit locks out to prevent flooding the false ceiling.
Need help with this diagnosis?
Marcel reads your error codes and walks you through them step by step, with sourced answers.
Or keep going right now in your browser:
