LG Dishwasher Error Code PC

The PC code means the dishwasher's control system could not confirm the synchronous distributor motor moved to its correct position within 5 minutes of starting. This applies to units running software version 7134 and later. When the fault occurs, the vane moves to the reset position and overshoots it while the heater shuts off. The most common causes are a loose connector at the distributor motor or micro switch, a failed micro switch, or a faulty distributor motor.

The dishwasher will not complete a normal wash cycle while the PC fault is active, and the heater is disabled as part of the fault response. Running the unit repeatedly in this condition will not clean dishes effectively. It is best to diagnose and resolve the error before continued use to avoid stressing other components in the system.

A power reset by unplugging the dishwasher or tripping the circuit breaker for a few minutes may temporarily clear the code, but it will return if the underlying fault is not corrected. Because the PC code is triggered by a confirmed failure to detect motor position over a 5-minute period, the control board will redetect the problem as soon as the distributor motor is commanded to move again. A permanent fix requires addressing the root cause, whether that is a connector issue, a failed micro switch, or a faulty motor.

The first step, checking and reseating the connectors for the distributor motor and micro switch, is within reach for a confident DIYer and requires no special tools. If the connectors are intact, testing the micro switch for continuity and inspecting the wiring harness for damage are reasonable next steps. Replacing the distributor motor or micro switch involves accessing internal components, so comfort with appliance disassembly is helpful. Control board replacement is best left to a qualified technician.

If the fix is simply reseating a loose connector, there is no parts cost involved. A replacement micro switch typically costs between $15 and $45 in parts. A new synchronous distributor motor assembly can range from $40 to $120 depending on the specific model. If professional labor is required, expect to add $80 to $200 in service fees on top of parts costs.