Won't start
Parts commonly needed when your LG washer has this issue. Recommendations are based on repair patterns and may not diagnose your specific problem.
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Parts
1Part numbers confirmed across multiple retailers for WM3700HVA
Repair tips for this issue
From the service manual for LG WM3700H Series Washers (2016)
From the service manual
Good to know
1 technician insights for the LG WM3700H Series Washers (2016)
repair_tip
When replacing the Main PWB, ensure ALL connectors are reinserted correctly before closing up. A missed connector (especially NA4 or BL3) can result in no inlet water, no drain, or a door that won't lock — symptoms that mimic a failed new board.
Seeing an error code on your display? Look up your error code → for more specific diagnostic information.