Samsung Air Conditioner Error Code E135

E135 indicates that the indoor clean fan's rotational frequency feedback is not being received by the MICOM control board. The clean fan motor is expected to send RPM signal pulses back to the control board to confirm it is running at the correct speed. When that signal is missing, the system triggers E135 and halts operation. The issue typically originates in the feedback wiring connection or the clean fan motor itself.

The unit will typically not operate normally while E135 is active, as the control system has detected a problem with the clean fan circuit. Attempting to force operation without resolving the fault is not recommended, as the underlying motor or wiring issue could worsen. Power the unit off until the fault is diagnosed and repaired.

If the issue is simply a loose connector or minor wiring repair, labor costs may be the primary expense, typically in the range of 75 to 150 dollars depending on your location and service provider. If the clean fan motor itself needs replacement, parts and labor combined could range from 150 to 400 dollars or more depending on the specific unit model and motor cost. Getting a diagnostic visit from a licensed technician will give you a more accurate estimate for your specific situation.

Start by checking the feedback connection line between the clean fan motor and the control board for loose connectors, broken wires, or corroded terminals. If the wiring appears intact, test the rotational output of the clean fan motor to verify it is spinning and generating a proper signal. If the motor is seized or its internal sensor has failed, the motor assembly will need to be replaced. A qualified technician should perform this diagnosis if you are not comfortable working with internal unit components.

A power reset may temporarily clear the error code display, but E135 will return if the underlying fault in the clean fan feedback circuit has not been fixed. The MICOM will attempt to read the RPM signal again on the next start cycle, and if the wiring or motor problem is still present, the code will reappear. A proper repair of the feedback wiring or motor is necessary for a permanent resolution.