Use this guide to understand common appliance parts, the problems they may cause, and how to check whether a replacement component is compatible with your model.
A symptom or error code may point toward a particular system, but it does not always prove that one part has failed. A washing machine drainage error, for example, could be caused by a blocked filter, restricted hose, damaged pump, faulty sensor, loose connection, or control problem.
Before ordering any part, confirm the appliance model number, complete the appropriate checks, and make sure the component matches the exact product series.
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Try searches such as:
- LG washer drain pump
- Samsung washer door lock
- Bosch dishwasher circulation pump
- Whirlpool dryer heating element
- Maytag washer water inlet valve
- GE refrigerator evaporator fan
- Daikin air conditioner temperature sensor
- De’Longhi coffee machine brew unit
For the most accurate result, include the full model number.
Browse Parts by Appliance
Washing Machine Parts
Common washing machine components include:
- Drain pump
- Water inlet valve
- Door lock or lid switch
- Drive motor
- Drive belt
- Shock absorbers
- Suspension rods
- Pressure sensor
- Temperature sensor
- Heating element
- Detergent dispenser
- Control board
- Drain hose
- Door seal
- Drum bearings
Possible symptoms include:
- Washer will not drain
- Water does not enter
- Door will not lock
- Drum does not spin
- Machine shakes heavily
- Washer leaks
- Cycle stops early
- Water does not heat
- Error code returns after reset
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Dryer Parts
Common dryer components include:
- Heating element
- Thermal fuse
- Thermostat
- Temperature sensor
- Drive belt
- Drum rollers
- Idler pulley
- Drive motor
- Door switch
- Moisture sensor
- Blower wheel
- Lint filter
- Control board
- Gas valve assembly
- Ignition component
Possible symptoms include:
- Dryer does not heat
- Drum does not turn
- Dryer stops during a cycle
- Clothes take too long to dry
- Dryer overheats
- Machine makes squealing or grinding sounds
- Control panel does not respond
- Airflow warning remains
Gas dryer parts should be tested and installed by a qualified professional.
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Dishwasher Parts
Common dishwasher components include:
- Drain pump
- Circulation pump
- Water inlet valve
- Heating element
- Door latch
- Float switch
- Leak sensor
- Temperature sensor
- Spray arm
- Filter
- Drain hose
- Detergent dispenser
- Control board
- Door seal
Possible symptoms include:
- Dishwasher will not drain
- Water does not enter
- Dishes remain dirty
- Water remains cold
- Appliance leaks
- Door will not latch
- Cycle stops
- Error code appears repeatedly
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Refrigerator Parts
Common refrigerator components include:
- Evaporator fan
- Condenser fan
- Compressor
- Start relay
- Temperature sensor
- Defrost heater
- Defrost thermostat
- Ice-maker assembly
- Water inlet valve
- Water filter
- Door switch
- Door gasket
- Damper control
- Control board
- Drain tube
Possible symptoms include:
- Refrigerator does not cool
- Freezer is too warm
- Food freezes in the refrigerator section
- Ice maker stops working
- Water dispenser does not work
- Frost builds up
- Refrigerator runs continuously
- Loud fan noise
- Water leaks inside the unit
Compressors, refrigerants, and sealed cooling-system components require qualified service.
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Air Conditioner Parts
Common air conditioner components include:
- Air filter
- Temperature sensor
- Fan motor
- Blower wheel
- Control board
- Capacitor
- Drain pump
- Drain hose
- Compressor
- Contactor
- Remote receiver
- Indoor coil
- Outdoor coil
- Refrigerant system components
Possible symptoms include:
- Unit does not cool
- Airflow is weak
- Indoor unit leaks water
- Fan does not run
- Air conditioner keeps stopping
- Circuit breaker trips
- Error code returns
- Outdoor unit does not start
Electrical capacitors may store dangerous voltage. Refrigerant and compressor work must be handled by qualified HVAC professionals.
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Boiler and Furnace Parts
Common heating-system components include:
- Ignition electrode
- Flame sensor
- Gas valve
- Circulation pump
- Pressure sensor
- Fan
- Air-pressure switch
- Heat exchanger
- Thermostat
- Temperature sensor
- Limit switch
- Control board
- Expansion vessel
- Condensate trap
Possible symptoms include:
- Boiler will not ignite
- Furnace blows cold air
- Heating system loses pressure
- Flame goes out
- Unit overheats
- Fan does not start
- Fault code returns after reset
- Hot water is unavailable
Gas, combustion, flue, pressure, and heat-exchanger work should only be performed by qualified heating professionals.
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Oven and Microwave Parts
Common oven and microwave components include:
- Heating element
- Temperature sensor
- Thermostat
- Door lock
- Door switch
- Cooling fan
- Convection fan
- Control board
- Display panel
- Turntable motor
- Magnetron
- High-voltage capacitor
- Thermal fuse
Possible symptoms include:
- Oven does not heat
- Temperature is inaccurate
- Door will not unlock
- Fan keeps running
- Microwave will not start
- Microwave runs but does not heat
- Turntable does not move
- Circuit breaker trips
Microwave ovens can retain dangerous electrical voltage after being unplugged. Internal microwave repairs should only be performed by trained professionals.
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Coffee Machine Parts
Common coffee-machine components include:
- Water pump
- Heating block
- Temperature sensor
- Brew unit
- Grinder
- Flow meter
- Water tank sensor
- Drain valve
- Milk-system parts
- Filter
- Tray sensor
- Control board
Possible symptoms include:
- Coffee does not dispense
- Water flow is weak
- Machine does not heat
- Grinder is blocked
- Brew unit will not move
- Descaling warning remains
- Machine leaks
- Tray warning will not clear
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Robot Vacuum Parts
Common robot vacuum components include:
- Main brush
- Side brush
- Drive wheel
- Caster wheel
- Cliff sensor
- Bumper sensor
- Battery
- Charging contacts
- Dustbin
- Filter
- Suction motor
- Charging dock
- Control board
Possible symptoms include:
- Robot will not charge
- Vacuum moves in circles
- Brushes do not turn
- Navigation is inaccurate
- Robot cannot find the dock
- Suction is weak
- Sensor warning remains
- Unit stops after a few minutes
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How to Identify the Correct Appliance Part
Do not choose a part based only on its appearance.
Two components may look almost identical but have different:
- Electrical ratings
- Connectors
- Mounting points
- Dimensions
- Sensor values
- Software versions
- Water or pressure ratings
- Regional specifications
Use the following information when checking compatibility:
- Appliance brand
- Full model number
- Product or service number
- Country or region
- Voltage and frequency
- Existing part number
- Revision or manufacturing code
- Appliance serial range, where required
A listing that says a part is suitable for a brand does not mean it fits every model from that manufacturer.
Where to Find the Model Number
The model number is normally printed on the appliance rating plate.
Washing machines and dryers
Check inside the door, around the door frame, near the detergent drawer, or behind the appliance.
Dishwashers
Look along the top or side edge of the open door.
Refrigerators
Check inside the refrigerator compartment, behind a drawer, or on an interior wall.
Air conditioners
Look on the indoor unit, outdoor unit, side panel, or rear label.
Ovens and microwaves
Check around the door frame, inside the door, behind the unit, or inside a lower drawer.
Boilers and furnaces
Look on the front panel, side casing, control compartment, or installation label.
The model number identifies the appliance design. The serial number normally identifies one individual unit.
Model Number, Serial Number, and Part Number
These numbers serve different purposes.
Model number
Identifies the appliance type, design, and product family.
Serial number
Identifies a particular appliance and may show its production period.
Part number
Identifies an individual component used in one or more appliance models.
Service or product number
Some manufacturers use an additional number to separate versions of the same model.
Always record every number from the rating label before buying a component.
Original, Compatible, and Aftermarket Parts
Appliance parts may be sold under several descriptions.
Original manufacturer part
An original part is supplied or approved by the appliance manufacturer for specified models.
Original equipment manufacturer part
An original equipment manufacturer, often called an OEM, may produce a component used in the original appliance.
Compatible replacement part
A compatible part is designed to replace the original component but may be made by another company.
Aftermarket part
An aftermarket component is made by a third party and may vary in quality, materials, warranty, and fit.
Used or refurbished part
A used part has been removed from another appliance. A refurbished component has normally been cleaned, tested, or repaired before resale.
Check the seller’s compatibility information, return policy, warranty, and product condition before ordering.
Superseded Part Numbers
Manufacturers sometimes replace an older part number with a newer one. This is known as a superseded part.
The replacement may have:
- A revised design
- Improved materials
- A different connector
- Additional mounting hardware
- Updated installation instructions
- Compatibility with several older numbers
Do not assume that every newer-looking component replaces an older part. Confirm the official supersession information for the appliance model.
Can an Error Code Identify the Failed Part?
Not always.
An error code normally identifies a fault condition or affected system. Several components may cause the same code.
For example, a water-filling error could involve:
- Closed water valve
- Low water pressure
- Blocked inlet filter
- Kinked hose
- Failed inlet valve
- Water-level sensor
- Loose connection
- Control-board fault
Replacing the inlet valve without checking the other causes may not solve the problem.
Use the error code together with:
- Appliance symptoms
- Model-specific guidance
- Visual checks
- Diagnostic results
- Manufacturer documentation
- Professional testing where required
Signs a Component May Be Faulty
A part may require further inspection when:
- The same code returns after basic checks
- The component makes an unusual sound
- There is visible damage
- A motor or pump does not operate
- A door or lid does not register as closed
- Water does not enter or drain
- Heating or cooling does not begin
- A fan does not turn
- The appliance stops at the same stage
- The control repeatedly loses communication
These signs do not always confirm that the component itself is defective. Wiring, power supply, blockages, settings, or control problems may produce similar symptoms.
Before Ordering a Replacement Part
Complete these checks:
- Record the full appliance model number.
- Record the existing part number.
- Confirm the country and voltage version.
- Check whether the old part number has been superseded.
- Compare connectors and mounting points.
- Review the seller’s compatibility list.
- Check the return policy.
- Confirm whether professional installation is required.
- Check the appliance warranty.
- Avoid ordering from photographs alone.
When uncertain, provide the full model and product numbers to the manufacturer, authorized parts supplier, or qualified technician.
Parts That Homeowners May Replace
Some appliances contain user-serviceable items such as:
- Filters
- Removable trays
- Water tanks
- Refrigerator water filters
- Vacuum brushes
- Robot vacuum wheels
- External hoses
- Detergent drawers
- Coffee-machine brew units
- Accessible door seals
- Simple shelves and containers
Follow the manufacturer’s instructions and disconnect the appliance safely where required.
Parts That Usually Require Professional Installation
Professional service is recommended for:
- Internal wiring
- Control boards
- Compressors
- Refrigerant components
- Gas valves
- Burners
- Heating circuits
- High-voltage microwave components
- Motors requiring major disassembly
- Sealed water systems
- Boiler pressure components
- Combustion parts
- Safety switches and interlocks
- Mains power cables
Do not bypass a safety device to make an appliance operate.
Warranty and Installation Considerations
Unauthorized repairs may affect warranty coverage.
Before opening the appliance or replacing an internal component:
- Check the warranty status
- Review manufacturer conditions
- Confirm whether authorized service is required
- Keep receipts and part records
- Photograph the original installation
- Avoid changing factory settings
- Do not remove safety labels
A correctly matched part can still be unsafe if it is installed incorrectly.
Important Safety Information
Stop using the appliance if you notice:
- Smoke
- Sparks
- Burning smells
- Gas smells
- Water near electrical components
- Damaged wiring
- Severe overheating
- Repeated circuit-breaker trips
- Refrigerant leakage
- Loud grinding or metal contact
- Unsafe door or lid operation
Disconnect power only when it is safe to do so.
Repairs involving electricity, gas, combustion, refrigerants, compressors, internal wiring, sealed systems, high-voltage components, or major disassembly should be performed by qualified professionals.
Frequently Asked Questions
How do I know which appliance part fits my model?
Match the full appliance model number, product number, regional version, and original part number with the compatibility information supplied by the manufacturer or seller.
Can I buy a part using only the error code?
No. The same code may have several causes, and the same part may not fit every model showing that code.
What is the difference between OEM and aftermarket parts?
OEM parts are made by the original equipment manufacturer or an approved supplier. Aftermarket parts are produced by third parties and may differ in quality, fit, warranty, and materials.
Can a replacement part have a different number?
Yes. A manufacturer may supersede an old part number with a newer replacement. Confirm that the change is officially listed for your model.
Should I replace the control board first?
Not without proper diagnosis. Control boards can be expensive, and sensor, wiring, power, motor, pump, or connection problems may produce similar symptoms.
Is a used appliance part safe?
It depends on the part, its condition, testing history, seller, and application. Safety-critical, gas, electrical, heating, and high-voltage parts require particular care.
Can I install an appliance part myself?
User-serviceable parts may be suitable for homeowners. Internal electrical, gas, refrigerant, high-voltage, combustion, and major mechanical repairs should be completed by qualified professionals.
Why does the new part look slightly different?
The manufacturer may have revised or superseded the original design. Do not install it until compatibility with the exact appliance model has been confirmed.
Is Error Code Vault an appliance-parts seller?
No. Error Code Vault is an independent informational website. We explain appliance components and compatibility checks but do not guarantee that a part will fit a particular model unless supported by verified information.
Is Error Code Vault affiliated with appliance manufacturers?
No. Brand names, product names, model numbers, component numbers, and trademarks belong to their respective owners.