GE Range Error Code LOCK

The LOCK code on a GE range indicates that the control has detected an open circuit in the door lock switch system. A flashing LOCK display is normal while the door is actively locking or unlocking during or after a self-clean cycle. A persistent or solid LOCK code points to a fault in the lock switch, its wiring, or on ERC-II models, a thermal switch that has opened due to overheating in the control area.

You should avoid running a self-clean cycle while the LOCK fault is active, since the door lock mechanism may not function correctly to secure the oven at the high temperatures self-clean requires. On ERC-II models, if the code is caused by overheating in the control area, continued use could risk further damage to the control board. It is best to diagnose and resolve the fault before using high-temperature functions.

Repair costs vary depending on which component has failed. Replacing a door lock switch or lock motor assembly typically runs in the range of $100 to $250 including parts and labor. A failed cooling fan is generally $75 to $175 to replace. If the thermal switch or the ERC-II control board itself has been damaged by overheating, costs can rise to $200 to $450 or more depending on parts availability and labor rates in your area.

Some causes are accessible to a knowledgeable DIYer. You can inspect the door lock mechanism for visible damage, check wiring connections for looseness or corrosion, and look for anything blocking ventilation around the range. However, testing lock switches for continuity and diagnosing a tripped thermal switch on ERC-II models requires a multimeter and familiarity with appliance wiring, so those steps are better suited to an experienced technician.

Resetting the range by cutting power at the breaker may temporarily clear the display, but the code will return if the underlying problem has not been corrected. On ERC-II models where overheating tripped the thermal switch, allowing the range to cool fully before restoring power may allow the switch to reset, but the fault will recur if the cooling fan or ventilation issue is not addressed.