Frigidaire Dishwasher MDB421RHS1 Leaking

The Dishwasher Tub Gasket is an OEM replacement part for Frigidaire dishwashers. It seals the gap between the dishwasher tub and the door, preventing water leaks and ensuring efficient operation. This tub gasket is typically made of durable rubber or silicone material, designed to withstand the heat, moisture, and chemicals involved in the dishwashing process

Symptoms of a faulty Dishwasher Tub Gasket include:

• Water leaks around the dishwasher door or base
• Failure to maintain proper water levels during cycles
• Condensation buildup or moisture issues outside the tub area
• Visible cracks, wear, or damage to the gasket material

Causes of a bad tub gasket can include normal wear and tear over time, exposure to excessive heat or chemicals, or physical damage from mishandling or improper door closure.

This OEM replacement is also compatible with Electrolux, Gibson, Kelvinator, and Kenmore dishwasher models.

The Water Inlet Valve is an OEM replacement part for Frigidaire washing machines. It is a component responsible for controlling the flow of water into the washing machine tub during the wash and rinse cycles.

Symptoms of a faulty Water Inlet Valve include:

• No water or insufficient water entering the washing machine tub
• Washing machine not filling or taking an excessive amount of time to fill
• Leaks or water dripping from the inlet valve area
• Unusual noises or vibrations during the fill cycle

Causes of a bad water inlet valve can include normal wear and tear over time, sediment buildup or blockages, electrical malfunctions, or physical damage from water pressure issues or freezing conditions.

This OEM replacement is also compatible with Electrolux, Gibson, Kelvinator, and Kenmore washing machine models.

The Front O-Ring is an OEM part for Frigidaire dishwashers. This component is essential for maintaining a watertight seal in the front areas of the dishwasher's internal systems, such as around the pump or valve connections. It prevents water leaks and ensures the efficient operation of the dishwasher. The rear O-ring is part number AP2109101

Causes of a bad front O-ring can include regular wear and tear, exposure to high temperatures, and chemical degradation from detergents and rinse aids. Over time, the O-ring may dry out, crack, or become deformed, leading to leaks and decreased performance.

Symptoms of a bad front O-ring include:

• Water leaking from the front of the dishwasher
• Puddles forming under the appliance
• Reduced cleaning performance due to water pressure issues
• Noticeable wear, cracks, or deformation on the O-ring

This OEM replacement is also compatible with Electrolux, Gibson, Kelvinator, and Kenmore models.

The Rear O-Ring is an OEM part for Frigidaire dishwashers. This small but crucial component ensures a watertight seal within the dishwasher's internal systems, preventing leaks by sealing connections between various parts, such as the pump or valve assemblies. The front O-ring is part number AP2109102

Causes of a bad rear O-ring can include regular wear and tear, drying out or cracking due to age, and damage from chemical exposure or improper installation. A compromised O-ring can lead to water leaks and reduced efficiency of the dishwasher.

Symptoms of a bad rear O-ring include:

• Water leaking from the dishwasher
• Puddles forming underneath the appliance
• Reduced washing performance due to water pressure loss
• Noticeable wear, cracks, or deformation on the O-ring

This OEM replacement is also compatible with Electrolux, Gibson, Kelvinator, and Kenmore models.

Upper dishwasher washarm delivery tube gasket.

This short connector hose links internal dishwasher plumbing to move water securely between components. Replacing a worn or cracked hose helps prevent leaks and keeps cycles running reliably. What it does:

• Routes water between two internal connection points during the wash cycle
• Helps maintain a watertight seal when properly clamped
• Common symptoms: water leaking beneath the unit, dampness around hose joints, visible cracks/hardening, or a loose fit
• Aging hoses can stiffen and drip at barbed fittings

• 1 connector hose

• Disconnect power and shut off the water supply before servicing
• Remove the toe-kick and pull the dishwasher forward as needed to access the hose
• Expect a small amount of residual water; have towels or a shallow pan ready
• Fully seat the hose on fittings, secure with appropriate clamps, then run a brief cycle and check for leaks

The Drain Hose is an OEM part for Frigidaire dishwashers. This part ensures that water flows smoothly and consistently out of the dishwasher after each wash and rinse cycle, preventing backflow, leaks, and potential water damage. 

Causes of a bad Drain Hose can range from physical damage, such as cracks or punctures that occur over time or through misuse, to clogs formed by food particles or grease that restrict water flow.  

Symptoms of a malfunctioning Drain Hose include:

• Water not draining properly from the dishwasher, leading to standing water after cycles
• Leaks detected around the dishwasher, which may indicate cracks or holes in the hose
• Kinking or blockage within the hose that impedes water flow

This OEM Frigidaire part is also compatible with Electrolux, Gibson, Kelvinator and some Kenmore models.

This sump gasket seals the connection between the dishwasher tub and the sump/pump assembly. Replacing a flattened or cracked gasket restores a watertight barrier to help stop leaks from the base and protect floors and cabinetry.

• Creates a seal between the tub and sump to contain wash water
• Helps prevent leaks during fill, wash, and drain cycles
• Replace if the gasket is cracked, brittle, deformed, or compressed
• Common symptoms: water under the dishwasher, dripping from the base, moisture around the toe-kick

• Disconnect power and shut off the water supply; pull the dishwasher out if needed for access
• Access the sump area (often by removing the lower rack, spray arm, and filters); note gasket orientation
• Clean mating surfaces; seat the gasket evenly without twists. Do not use sealants unless specified by the manufacturer
• Reassemble and run a short test cycle while inspecting for leaks