Samsung Microwave Error Code E-45

E-45 indicates a cooling error with the Easy sensor or PH humidity sensor. The control board detected that the sensor's voltage output stayed above 3 volts for more than 3 minutes without returning to a normal range. This fault causes the microwave to stop operating until the issue is resolved. It is most often triggered by excess moisture on the sensor from steam cooking.

No, you should not attempt to bypass or continue using the microwave while E-45 is active. The unit has disabled itself because the sensor is providing an out-of-range signal, which could lead to improper cooking cycles or further component stress. Resolve the fault before resuming normal use.

If the fix is simply drying out the sensor, there is no parts cost involved. If the Easy or PH sensor itself needs to be replaced, parts typically range from around $20 to $60 depending on the model, plus labor if a technician performs the repair. In cases where the control board is at fault, repair costs can range from $100 to $250 or more, at which point evaluating the cost of replacement versus repair is worth considering.

Start by opening the microwave door and wiping down the interior, paying close attention to the sensor area where moisture may have collected. Leave the door open for several minutes to allow any remaining condensation to evaporate, then restart the unit. If the error clears, the problem was moisture-related. If E-45 returns immediately after restarting in a dry condition, the sensor or its wiring will need to be inspected and possibly replaced.

A power reset alone, such as unplugging the unit for a minute and plugging it back in, may temporarily clear the code, but it will return quickly if the underlying cause is not addressed. If moisture is the issue, drying out the sensor area before restarting is the key step. If the sensor has failed, a reset will not provide a lasting fix.