Daikin Air Conditioner Error Code CE

The CE code indicates an abnormality with the presence sensor or floor sensor on the indoor unit. The control board detected that the sensor was either disconnected or shorted while the unit was running. The first place to check is connector X81 on the indoor unit PCB, as a loose connection is a common trigger for this fault.

The CE code is a sensor fault rather than a refrigerant or electrical hazard, so running the unit briefly is unlikely to cause immediate safety risks. However, with a faulty presence or floor sensor, the unit cannot accurately regulate its output as intended, which may lead to inefficient operation or discomfort. It is best to resolve the fault before extended use.

Repair costs vary depending on the root cause. If the fix is simply reseating connector X81, a service call fee may be the primary expense, generally in the range of $75 to $150. If the sensor or wiring harness needs replacement, parts and labor together typically range from $100 to $300. A PCB replacement would be at the higher end of the cost spectrum, potentially $250 to $600 or more depending on the model.

A homeowner comfortable working around electronics can inspect connector X81 on the indoor PCB to see if it is loose or visibly damaged. However, testing sensor resistance values and tracing wiring faults inside the unit typically requires disassembly and a multimeter, so many users prefer to call a qualified technician. If the PCB itself is faulty, professional repair or replacement is recommended.

A power reset may temporarily clear the CE code, but the error will return if the underlying sensor or wiring issue is not corrected. Because the fault is detected during active operation, the board will re-trigger the code as soon as it reads an abnormal sensor signal again. A proper repair of the connector, wiring, or sensor is needed for a permanent fix.