Compressor
Used in: Refrigerators, freezers, air conditioners
The heart of your refrigerator's cooling system. Compresses and circulates refrigerant through coils to remove heat. When it fails, the appliance won't cool properly.
Professional repair required - refrigerant handling needs EPA certification
Inverter Board
Used in: Refrigerators, washers, microwaves
Electronic control board that regulates motor speed for energy efficiency. Modern appliances use variable-speed motors controlled by inverter boards instead of simple on/off operation.
Common failure - requires factory diagnostic tools to pinpoint
Magnetron
Used in: Microwave ovens
The component that generates microwaves to heat food. When the magnetron fails, the microwave runs but doesn't heat. Failures often occur in high-use commercial units.
High-voltage component - professional replacement essential for safety
Control Board / Main PCB
Used in: All modern appliances
The "brain" of the appliance. Manages all electronic functions, sensor inputs, and user interface. Today's appliances are essentially computers - control board failures are increasingly common.
Requires programming - must be calibrated to specific appliance model
Door Switch / Interlock
Used in: Microwaves, dishwashers, dryers
Safety mechanism that prevents operation when door is open. Microwave door switches are critical safety devices - a failed switch can prevent the unit from running entirely.
Safety component - often multiple switches work in series
Thermistor / Temperature Sensor
Used in: Refrigerators, ovens, dishwashers
Electronic temperature sensor that provides feedback to the control board. Refrigerators use multiple thermistors to monitor different zones. Failed sensors cause temperature regulation issues.
Common issue - inexpensive part but requires proper diagnosis
Drain Pump
Used in: Dishwashers, washing machines
Removes water from the appliance at the end of cycle. When it fails, you'll see standing water or the appliance won't advance through cycles. Often fails due to debris blockage.
DIY check - inspect for clogs before calling for service
Heating Element
Used in: Ovens, dryers, dishwashers, water heaters
Converts electrical energy to heat. Dryer elements heat air, dishwasher elements heat water, oven elements provide cooking heat. Visible glowing when functioning properly.
Testable - can check resistance with multimeter
Ice Maker Assembly
Used in: Refrigerators with ice makers
Complete unit that produces and dispenses ice. Includes water valve, mold/tray, motor, and sensors. Samsung ice makers have known design issues requiring full assembly replacement.
Brand-specific - some manufacturers have extended warranties on ice makers
Capacitor
Used in: Compressors, motors, power supplies
Stores electrical energy to help motors start and run efficiently. Microwave high-voltage capacitors store dangerous charge even when unplugged. Failed capacitors often cause motors not to start.
Dangerous component - can deliver lethal shock; professional service required
Defrost Timer / Control
Used in: Refrigerators, freezers
Controls the defrost cycle to prevent ice buildup on evaporator coils. Modern appliances use adaptive defrost controlled by the main board. Failures cause excessive frost or temperature issues.
Diagnosis - requires checking multiple components in defrost system
Circulation Pump
Used in: Dishwashers
Pumps water through spray arms to clean dishes. Different from drain pump - this one recirculates water during wash cycle. When it fails, dishes don't get clean despite water filling normally.
Common failure - especially in hard water areas