LG Microwave Error Code E-43

E-43 on an LG microwave indicates an Easy Clean or PH sensor T1 maximum time error. This means the humidity sensor used for automatic sensor cooking failed to detect a valid steam reading within its allowed time window. The most frequent causes are an empty cavity, a dirty sensor surface, or a blocked sensor. In some cases, the sensor itself may need to be replaced.

Unplugging the microwave for a minute and plugging it back in may temporarily clear the error code, but if the underlying cause is not addressed it will return the next time a sensor cook mode is used. Resetting is useful for confirming whether the error was a one-time event, but persistent E-43 faults require diagnosing and correcting the root cause before the unit will operate reliably.

If the fix involves only cleaning the cavity or correcting how food is loaded, there is no parts cost involved. If the humidity sensor needs to be replaced, parts and labor costs can range from roughly $50 to $150 or more depending on the microwave model and local service rates. In some cases, if the unit is older or the repair cost is high relative to the appliance value, replacement may be worth considering.

Start by confirming that food was actually placed inside before starting a sensor cook cycle. Then clean the interior of the microwave thoroughly, paying close attention to the sensor window area on the cavity wall. If the error persists after cleaning and testing with food present, inspect the sensor and its wiring connection for damage. A faulty sensor will need to be replaced to resolve the error permanently.

The E-43 error specifically affects sensor-based automatic cooking modes, so manual time-based cooking may still function normally. However, using the microwave in a degraded state without resolving the underlying sensor fault is not recommended. If the sensor or its wiring is damaged, it is best to address the issue before continued use.