Lg 5230W1A003C Charcoal Filter OEM Part

Replace Thermostat on top of cavity. The thermostat is attached via 2 bending sheet metal tabs. Ours blew because the two wires connected to thermostat shorted, connectors melted. The short was caused by buildup of grease under thermal wire cover, shorting both leads. The unit is used heavily. This is the first thermostat to go. I had to replace wire connectors that connected to thermostat as well since the connectors were melted as well. Helpful hint. The grease build up was probably caused by obstructed air flow from the stove top through the exhaust vent. BE CAREFUL. The exhaust vent on the back of the unit has a flap that opens up when the fan is on. There are tabs on the top of the vent frame that are bent down, so that when the flap opens it is blocked from opening 100%, and instead only opens about %40. This obstructed flow, in my opinion, reduces air flow rate, which allows exhaust to back up and collect, as well as thermostat and unit to overheat. Solution: Bend the tabs up on the back of the exhaust vent to allow the door to open fully. Double check if there is another vent on your wall to the exterior, and make sure it fully opens as well.

The fix was easy but finding the charcoal filters was the hard part. Thanks to AppliancePartsPros I found them.

Read the microwave manual on how to change the dirty filter.

Read the book and replaced the charcoal filter.

The Charcoal filter fit in the hole but was protruding at the bottom. Once I got on a stool I realized that there were brackets for the filter to sit on. For the Grille vent it wasn't fitting in one of the slots. I realized a broken tab was still in the hole, used a tiny screwdriver to get it out. Also, the tab with a hole in it on the left requires a Phillips head screwdriver (again something noticed once high enough) to remove the screw on top of the microwave.