If the blower motor of an air conditioning unit continues to run after the unit has been turned off from the remote control, it could be due to a few possible reasons:
Delayed Fan Shutdown: Some air conditioning systems are designed with a delay feature that keeps the blower motor running for a short period even after the cooling compressor has turned off. This delay is intended to ensure that all remaining cool air in the system is circulated and that the evaporator coil is properly dried to prevent mold and mildew growth.
Thermostat Settings: Check the settings on your thermostat or remote control to ensure that the fan is not set to "continuous" or "on" mode. If the fan mode is set to "on," it will keep the blower motor running even when the cooling or heating function is turned off.
Malfunctioning Thermostat: If the thermostat is not functioning correctly, it may not be sending the signal to shut off the blower motor when you turn off the unit. In this case, it may require recalibration or replacement.
Wiring Issues or Control Board Problems: Faulty wiring or a malfunctioning control board can cause the blower motor to continue running even when it should be turned off. This requires professional inspection and repair to diagnose and fix the issue.
If the blower motor continues to run after turning off the air conditioning unit, it's recommended to consult with a qualified HVAC technician to diagnose and resolve the problem. They will be able to identify the specific cause and provide the necessary repairs or adjustments to ensure proper functionality of the system.