LG Microwave Error Code E-Ct

The E-Ct code on an LG microwave indicates a short circuit error in the PCB temperature sensor that monitors the cooling fan motor. The control board has detected that the sensor circuit resistance has dropped abnormally, which signals a short circuit condition. The microwave stops operating to protect its internal components until the fault is diagnosed and repaired.

No, you should not attempt to use the microwave while the E-Ct error is active. The error indicates a fault in the thermal protection circuit for the cooling fan motor, which means the appliance cannot properly monitor for overheating. Continued use without resolving the fault could risk further damage to the control board or other internal components.

Repair costs vary depending on what component has failed. If only a wiring repair is needed, technician labor costs might range from roughly 75 to 150 dollars. If the temperature sensor itself requires replacement, parts and labor combined could run from around 100 to 200 dollars. A control board replacement is the most expensive scenario, potentially ranging from 150 to 350 dollars or more depending on the model and labor rates in your area.

Some causes, such as a loose connector or minor wiring damage, can potentially be addressed by a skilled DIYer who is comfortable working inside appliances and following proper safety precautions. However, microwave capacitors can retain a lethal electrical charge even when unplugged, so the internal components should only be accessed by someone who knows how to safely discharge the capacitor. If the control board or sensor component needs replacement, a qualified technician is recommended.

A simple reset, such as unplugging the microwave and plugging it back in, is unlikely to permanently clear the E-Ct error because it is caused by a physical short circuit in the sensor or its wiring. The fault will return as soon as the microwave re-checks the sensor circuit. The underlying short circuit must be located and repaired before the error will clear.