How it works
How a Refrigerator Works
A system-level explanation designed to make error codes and symptoms easier to understand.
Normal operating sequence
1. CompressThe compressor raises refrigerant pressure and circulates it through the sealed system.
2. Reject heatThe condenser releases heat to the room. Good ventilation around the appliance matters.
3. Expand and evaporateRefrigerant pressure drops through a metering device and absorbs heat in the evaporator.
4. Move cold airFans move air across the evaporator and through compartments on many frost-free models.
5. DefrostFrost-free systems periodically melt evaporator frost using a controlled defrost system.
Main components
These are the component names most likely to appear in manuals, error-code explanations and service conversations.
- Compressor
- Condenser
- Evaporator
- Condenser fan
- Evaporator fan
- Thermistors
- Defrost heater/control
- Dampers/air channels
What a symptom can tell you
A symptom usually narrows the affected system, not the exact failed part. For example, “not draining” can involve a blockage, installation, pump, sensor or control problem. Use the exact model documentation before moving beyond user-accessible checks.
Do not infer a failed part from one symptom: Error codes and symptoms are diagnostic clues. They are not automatic parts orders.