5701 (P4) Contact failure of drain float switch

What does 5701 (P4) mean?

This error means there's a problem with the drain float switch in the indoor unit. This switch detects water levels in the drain pan, and a contact failure suggests it's not working correctly, possibly due to a blockage or a faulty switch.

• Contact failure of drain float switch.
• Accumulation of debris in the drain pan preventing the float switch from operating.
• Malfunction of the drain float switch itself.
• Disconnection of the drain float switch wiring.

Click steps to track your progress.

1. 1

   Turn off the power to the indoor unit at the circuit breaker.

2. 2

   Locate the indoor unit's drain pan and inspect it for any standing water or blockages.

3. 3

   Gently clear any debris from the drain pan and ensure the drain line is clear.

4. 4

   Check the wiring connections to the drain float switch for any looseness or damage.

5. 5

   Restore power to the unit and see if the error clears. If not, contact a service technician.