Haier Dryer Error Code E4

E4 on a Haier dryer signals a fault with the NTC temperature sensor, which monitors heat inside the drum during a drying cycle. The control board has detected that the sensor circuit is either shorted or open, meaning it is receiving a signal that indicates a complete circuit failure rather than a normal temperature reading. The dryer shuts down to prevent unsafe operation without accurate temperature feedback.

No, you should not continue operating the dryer while E4 is active. The error means the dryer has lost reliable temperature monitoring, which is a key safety function. Running the dryer without a functioning temperature sensor could allow the appliance to overheat, creating a fire or heat damage risk. Resolve the fault before resuming normal use.

If the issue is just a loose connector, the repair can cost nothing beyond your time. If the NTC thermistor needs to be replaced, parts typically range from a few dollars to around $30 to $50 depending on the specific model. If the repair is done by a professional technician, expect to add a service call and labor fee, bringing the total to somewhere in the range of $75 to $200 depending on your location and the extent of the fault.

In many cases, yes. Start by unplugging the dryer and checking that the NTC sensor's wiring harness terminals are fully and correctly inserted at both the sensor and control board ends. If the connections are secure, use a multimeter to test the sensor for proper resistance or continuity. If the sensor has failed, it is a component that a confident DIYer can replace, though any work involving internal wiring should be done with the dryer fully unplugged.

A power reset by unplugging the dryer for a few minutes may temporarily clear the code, but if the underlying sensor or wiring fault is still present, E4 will return once the dryer runs again. A reset is only useful as a first step to rule out a transient glitch. The actual cause, whether a loose connector, damaged wire, or failed sensor, needs to be diagnosed and corrected for the error to stay cleared.