LG Fridge Compressor Not Running: Linear Compressor Warranty and Diagnosis

LG refrigerators with the Linear Compressor have a known reliability issue that led LG to extend the compressor warranty to 10 years from purchase. If your LG fridge is not cooling and you can NOT hear the compressor running (normally a low humming from the bottom rear), the Linear Compressor may have failed. Before calling for expensive repair: check if your model is covered under LG's extended compressor warranty. The warranty covers the compressor PART for 10 years and labor for 5 years (or the original warranty period, whichever is longer). The compressor itself costs $400-800 to replace, so warranty coverage is significant. Signs of compressor failure: fridge and freezer both warm, no humming sound from bottom rear, clicking sound every few minutes (relay trying to start the compressor), or the compressor runs briefly then clicks off.