Ldf7920st Parts

The Blower Motor Assembly is an OEM replacement part for LG dishwashers. Located inside the wash cavity, it functions to distribute heated air throughout during the dry cycle. Rapid rotation of the blower motor blades works to eject moisture from dishes and ensure thorough drying. 

Causes of a bad blower motor include failure of the motor itself, cracks in the blades that disrupt airflow, or bearing issues preventing proper rotation.

Symptoms include:

• Dishes still feeling damp after a cycle 
• Puddles of water remaining in the bottom of the dishwasher
• Water droplets on upper racks/dishes
• The motor producing grinding/squealing noises on startup

It is also compatible with some Kenmore dishwashers using LG components. 

The Check Valve is an OEM part for LG dishwashers. It prevents the backflow of water into the dishwasher, ensuring that water only flows in the intended direction. This helps maintain the efficiency of the washing cycle and prevents contamination of clean dishes.

The check valve can fail due to reasons such as wear and tear, blockage from debris or hard water deposits, or damage from high water pressure. Over time, the internal components can degrade, leading to improper sealing.

Symptoms of a bad check valve include:

• Water backing up into the dishwasher
• Poor cleaning performance due to improper water flow
• The dishwasher not draining properly
• Unusual noises during the wash or drain cycles

This OEM LG part is also compatible with certain models of Kenmore dishwashers.

The Upper Spray Arm is an OEM part for LG dishwashers. This part is located at the top of the dishwasher tub, responsible for spraying water and detergent onto the upper rack of dishes during the wash cycle.

Causes of a bad Upper Spray Arm can include mineral buildup or debris clogging the spray holes, physical damage from impact or foreign objects, or wear and tear over time.

Symptoms of a faulty Upper Spray Arm include:

• Incomplete or ineffective washing of dishes on the upper rack
• Water not spraying evenly or not spraying at all from the upper arm
• Clogged or blocked spray holes
• Loud noises or grinding sounds during the wash cycle

This OEM LG part is also compatible with some Kenmore models.

The Upper Spray Arm Pivot Shaft is an OEM part for LG dishwashers. This part allows the upper spray arm to rotate and distribute water evenly throughout the upper rack during the washing cycle.

Causes of a bad part can include wear and tear over time, damage from foreign objects, or improper installation or alignment.

Symptoms of a bad Upper Spray Arm Pivot Shaft include:

• The upper spray arm not rotating or spinning
• Poor water coverage and cleaning performance in the upper rack
• Loud grinding or squeaking noises coming from the upper rack area

This OEM LG part is also compatible with some Kenmore models.

This lower spray arm (nozzle assembly) mounts at the bottom of the tub and spins to deliver pressurized wash water across dishes. Replacing a cracked or clogged arm restores even spray coverage and helps resolve poor cleaning results.

• Distributes wash water from the pump across the lower rack area
• Rotates to provide even spray coverage and rinsing
• Replaces warped, cracked, or clogged arms that reduce cleaning or cause noise
• Common symptoms: dishes not getting clean, spray arm not turning, visible damage or blockages

• Disconnect power at the breaker; open the door and remove the lower rack
• Release the old arm from the center hub (turn/unsnap retainer) and lift off
• Clear debris from the hub and filter area; seat the new arm fully and verify free rotation
• Restore power and run a short cycle to proper spray action

This gasket creates a watertight seal between mating parts in the dishwasher's water system. Replacing a worn or damaged seal helps stop leaks during cycles and maintains proper wash performance. What it does:

• Seals the joint between components such as the sump, pump housing, or inlet assemblies
• Prevents water leakage under pressure during fill, wash, and drain
• Helps maintain spray pressure by reducing internal bypass
• Common symptoms include water on the floor or in the base pan, and a flattened, cracked, or brittle old gasket

• One gasket

• Disconnect power and turn off the water supply before servicing
• Access the gasket location and remove any retaining hardware
• Remove the old gasket and clean both sealing surfaces thoroughly
• Seat the new gasket evenly without twisting; tighten fasteners/clamps uniformly and run a test cycle to check for leaks

This small sleeve bushing supports a pivoting or rotating joint in your dishwasher, providing a smooth bearing surface. Replacing a worn bushing helps restore quiet operation and protects mating parts from further wear. What it does

• Provides a low-friction surface between a shaft/pin and bracket
• Helps maintain proper alignment and reduces wobble at the joint
• Can quiet squeaks or grinding caused by wear
• Replacing a cracked or flattened bushing can improve smooth movement

• 1 bushing

• Disconnect power and shut off water before servicing
• Support the door or component attached to the joint to relieve tension
• Note orientation; transfer any spacers/washers in the same order
• Inspect the mating pin/shaft for wear and replace related parts if damaged

This thermistor holder secures the temperature sensor in place inside the dishwasher, ensuring accurate water temperature readings for proper wash and dry performance.

• Holds the thermistor securely in the sump/tub area
• Helps the control accurately monitor wash water temperature
• A loose or missing holder can cause temperature-related wash issues
• Common symptoms include temperature errors or poor cleaning/drying when the sensor isn't properly positioned

• Disconnect power and turn off water supply before servicing
• Access the sensor location from the tub/sump area; note original orientation
• Transfer the thermistor into the new holder and snap the holder into place
• Inspect the sensor wiring and seals while reassembling

This door latch and lock assembly secures the dishwasher door and signals the control that it's safely closed. Replacing a worn latch restores firm door closure, a reliable seal, and consistent cycle operation. What it does:

• Locks the door so cycles can start and continue without interruption
• Helps compress the door gasket for a proper, leak-resistant seal
• Sends a door-closed signal to the control
• Common symptoms: won't start with the door shut, door won't latch or pops open, cycle pauses when jostled, water leaking at the door edge

• One door latch/lock assembly

• Disconnect power at the breaker before servicing
• Remove the inner door panel to access the latch at the top of the door
• Note wire connector positions; move them to the new assembly and secure the latch
• Check latch engagement with the strike and adjust alignment if needed before reassembly

This impeller assembly spins on the dishwasher's pump to move water through the system. Replacing a worn or broken impeller restores proper water flow, helping maintain wash performance and reducing noise from the pump area. What it does:

• Moves water through the dishwasher's pump system for circulation and cleaning
• Helps maintain correct water flow and spray pressure to the spray arms
• Typical failure signs: poor cleaning or weak spray, unusual grinding/humming from the sump, or slow/no draining depending on which impeller has failed
• Physical clues include damaged/broken blades or a loose fit on the motor shaft

• 1 impeller assembly

• Disconnect power and turn off the water supply before servicing
• Remove the lower rack and filters to access the pump/sump; follow your model's service information
• Note the impeller's orientation; transfer any reusable seals or hardware from the original as required
• After reassembly, check for leaks and verify the pump spins freely before running a test cycle

This replacement switch cam interfaces with a lever or knob to actuate a microswitch. It restores reliable on/off signaling and the positive feel/engagement of the related control or latch mechanism when the original cam wears or cracks.

• Translates lever or rotary motion into precise switch activation
• Ensures the switch travels fully to open and close as intended
• A worn or broken cam can cause intermittent operation or functions that won't start/stop as expected
• Helps bring back a defined "click" or detent at the control/lever

• Disconnect power to the appliance before servicing; turn off gas/water if applicable
• Access the switch or latch assembly; remove any knob, trim, or cover as needed
• Note the cam's orientation/indexing before removal; take photos for reference and transfer any springs/clips
• After reassembly, manually test the mechanism to ensure smooth switch actuation before restoring power

This dishwasher sump gasket seals the joint between the sump assembly and the tub to prevent leaks and maintain wash performance. Replace it if the old seal is worn, flattened, cracked, or damaged to stop water escaping beneath the unit.

• Creates a watertight seal where the sump attaches to the tub
• Helps prevent water leaks from the base of the dishwasher
• Supports proper circulation and overall wash performance
• Common failure signs: puddles under the unit, leaks during a cycle, or a visibly torn/deformed gasket

• Disconnect power and turn off the water supply before servicing
• Access the sump from inside the tub (remove lower rack, spray arm, filters, and sump cover) or from below, depending on model
• Clean mating surfaces; install the new gasket evenly without twists or gaps
• Reassemble and run a short cycle to check for leaks

Sump assembly collects and channels a washer's drained water into the drain pump to let the machine empty properly. Replacing a worn or cracked sump helps stop leaks and restores normal draining performance. What it does:

• Directs and funnels tub water to the drain pump so the washer can evacuate water.
• Prevents water from leaking under the washer when intact and properly sealed.
• Can cause poor or no draining, standing water in the tub, or drain/pump-related error codes when damaged.
• May produce unusual noises during the drain cycle if cracked or clogged.

• Disconnect power and turn off water supply before starting any repair.
• Access typically requires removing the washer's front or lower access panel; support the machine as needed.
• Inspect and replace any worn seals, hoses, or clamps when installing to ensure a watertight fit.
• After installation, run a short drain/spin cycle and check for leaks before returning the washer to regular use.

The Micro Switch is an OEM part for LG dishwashers. It plays a crucial role in detecting when the door is securely closed prior to starting a cycle. This important safety feature prevents accidental exposure to hot water, detergent, and chemicals. 

Causes of a bad micro switch include degradation from years of repeated use, debris interfering with mechanisms, or damage from attempts to force or slam the dishwasher door closed.

Symptoms of a bad micro switch include:

• Cycles failing to start despite a closed door
• Hot water or steam visible escaping when running 
• The dishwasher not detecting the closed door position
• Error codes displayed related to door position sensors

This OEM LG part is also compatible with Sears/Kenmore. Replacing only when truly faulty helps ensure safe and reliable dishwasher function.
 

This check valve is a one-way valve used in the refrigerator's water line. It prevents backflow to maintain pressure for the dispenser and ice maker, helping reduce drips and ensuring consistent water delivery.

• Allows water to flow in one direction only to prevent backflow
• Helps maintain line pressure for steady dispensing and proper ice fills
• May reduce post-dispense dripping at the water outlet
• Failure symptoms can include slow/sputtering dispense, dripping, or inconsistent ice fills

• Unplug the appliance and shut off the household water supply before servicing
• Dispense water to relieve pressure; place a towel to catch residual water
• Note the valve's orientation/flow direction and tubing routing before removal
• Fully seat tubing and secure connections; restore water and check for leaks

Color: blue. It measures about 3 inches wide by 1 inch high.