Haier Air Conditioner Error Code E5

The E5 code on a Haier air conditioner indicates that the compressor discharge temperature sensor circuit is either shorted or broken. The control board cannot obtain a valid temperature reading from this sensor, so it shuts down the compressor as a protective measure. You will typically see the power light blinking, the timer light on, and the run light off when this fault is active.

No, you should not attempt to force the unit to run while E5 is active. The compressor discharge temperature sensor is a safety component that protects the compressor from overheating damage. Without a valid reading from this sensor, the system has no way to detect a dangerously high discharge temperature, which could lead to compressor failure or other damage if the unit were operated.

Repair costs vary depending on the cause. If only a connector needs reseating or cleaning, the cost may be limited to a service call fee, typically in the range of $75 to $150. Replacing a discharge temperature sensor usually adds $20 to $80 in parts. If the control board has failed, board replacement can bring the total repair cost to a range of $200 to $450 or more, depending on the model and labor rates in your area.

A knowledgeable DIYer can start by checking the wiring connectors at the sensor and control board for looseness or corrosion, since a reseated connector sometimes clears the fault. However, testing sensor resistance requires a multimeter and some technical knowledge, and replacing the sensor or control board involves working with refrigerant-side components that may require a certified technician. If the basic connection checks do not resolve the error, professional service is recommended.

A power reset may temporarily clear the E5 code, but if the underlying fault in the sensor or wiring is still present, the error will return once the unit attempts to operate. Resetting without diagnosing and repairing the root cause is not a lasting solution and could mask an ongoing problem with the sensor circuit.