P4

Drain Float Switch Error

Description

The drain sensor or float switch connector is open, or the drain overflow protection has been triggered, indicating a blocked or malfunctioning drain system.

Appliance Error Codes Details

Error Code
P4
Error Name
Drain Float Switch Error
Appliance Type
air_conditioner
Brand
Mitsubishi
Severity
medium

Additional Troubleshooting

1. Turn off the unit
2. Check the drain pan, hose, and pump for blockages
3. Verify the drain sensor and float switch connectors are properly seated
4. Contact service if the drain system is clear but the error persists

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Fact-checking completed

Verified by: Pavel Volkov
Created:
Last updated:
Information verified against official sources

Official Sources

Official Manufacturer Service Manuals

Service manuals and technical documentation from appliance manufacturers

Original equipment manufacturers official documentation

Industry Standards Organizations

International standards for electrical appliances and error codes

International Electrotechnical Commission standards