Samsung Air Conditioner Error Code 135

Error code 135 indicates an indoor clean fan rotational frequency feedback error. This means the control board is not receiving the expected speed signal from the clean fan motor inside the indoor unit. The issue can stem from a wiring fault, a failed motor sensor, or a motor that is not turning. Diagnosis starts with checking the feedback wiring connection and confirming whether the motor rotates.

Continuing to operate the unit with error 135 active is not advisable. The clean fan plays a role in internal air circulation and purification, and running without it functioning correctly can reduce efficiency and potentially cause the unit to overheat internally. It is best to address the fault before resuming normal operation.

Repair costs vary depending on the root cause. If the fix is simply reseating a loose connector, cost may be limited to a service call fee, typically in the range of $75 to $150. If the clean fan motor needs replacement, parts and labor combined can range from $150 to $400 or more depending on the unit model and labor rates in your area. A control board replacement would be at the higher end of that range or beyond.

A knowledgeable DIYer can check for obvious wiring issues such as loose connectors or visibly damaged harnesses without specialized tools. However, testing motor rotational output, measuring feedback signal pulses, and replacing motor components typically requires disassembling the indoor unit and using a multimeter or oscilloscope. If you are not comfortable working inside the unit, a qualified technician is recommended.

A power reset may temporarily clear the error code from the display, but the fault will return if the underlying cause has not been fixed. Because error 135 is triggered by a real-time feedback signal problem, the control board will detect the same condition as soon as the unit attempts to run the clean fan again. A reset alone is not a repair.