Thermador Dishwasher Gasket & Seal

This replacement sealing gasket restores a tight, leak-resistant barrier between mating components in your appliance. Replacing a worn seal helps prevent leaks and moisture escape to keep performance stable and reliable.

• Maintains a watertight/airtight seal between connected parts
• Helps resolve leaks, drips, and moisture pooling inside or beneath the unit
• Addresses issues caused by flattened, cracked, or hardened seals
• Supports proper operation by preserving pressure and flow at the joint

• Disconnect power and, if applicable, shut off water before servicing
• Remove the related cover/assembly to access the old seal; note its orientation
• Clean the groove/mating surfaces; install the new seal evenly without stretching
• Reassemble and run a short test to check for leaks

The Lower Door Seal is an OEM part for Bosch dishwashers. It is installed at the bottom of the dishwasher door to prevent water from leaking out during the washing cycle. This seal ensures that the dishwasher operates efficiently by maintaining a tight closure, keeping water contained within the unit and protecting your kitchen from water damage.

Causes of a bad Lower Door Seal can include general wear and tear, damage from sharp objects, or drying out and cracking due to heat and detergent exposure.

Symptoms of a bad Lower Door Seal include:

• Visible tears or gaps in the seal,
• Water leakage around the dishwasher door,
• Unusual moisture accumulation on the kitchen floor near the dishwasher.

This OEM Bosch part is also compatible with Thermador, Gaggenau, and some Kenmore models.

The Lower Door Seal is an OEM part for Bosch dishwashers. It plays a crucial role in preventing water from leaking out of the dishwasher door during cycles. This seal is positioned along the bottom of the door, ensuring a tight and secure closure that keeps water contained within the unit.

Causes of a bad Lower Door Seal may stem from various factors. These include natural wear and tear due to extended use, chemical degradation caused by harsh detergents, physical damage like tears or cuts, as well as improper installation or alignment.

Symptoms of a bad Lower Door Seal include:

• Water leaking from the bottom of the dishwasher door
• Visible signs of wear or damage on the seal
• Mold or mildew buildup on the seal due to constant moisture exposure

This OEM Bosch part can also be used on Thermador and Gaggenau appliances.

The Check Valve is an OEM part for Bosch dishwashers. It prevents the backflow of water into the dishwasher after it has been drained, ensuring that dirty water does not re-enter the appliance and contaminate clean dishes.

Causes of a bad check valve can include blockages from debris or food particles, wear and tear over time, or damage from improper installation or handling. These issues can impair the valve's ability to effectively prevent backflow.

Symptoms of a bad check valve include:

• Water not draining properly from the dishwasher
• Dirty water pooling at the bottom of the dishwasher
• Foul odors coming from the dishwasher
• Residual water remaining in the tub after the cycle ends

This OEM Bosch part is also compatible with Thermador, Gaggenau, and some Kenmore models.

The Lower Door Seal is an OEM replacement part for Bosch dishwashers. It provides a critical sealing surface along the bottom perimeter of the dishwasher door. Through a rubber seal, it shields the interior from external moisture and debris infiltration.

Causes of a faulty lower door seal include dry rotted or cracked rubber compromising the seal over many years of use. Food debris or mineral buildup along the seal interface can also inhibit proper closure.

Symptoms of a bad lower door seal include:

• Puddling, leaks, or excessive moisture inside the dishwasher
• Poor drying results from inadequate containment of wash chamber humidity
• Errors related to blocked moisture sensors detecting intrusion
• Inability to close or latch the dishwasher door completely

This lower door seal replacement is also compatible with some Thermador, Gaggenau, and Kenmore dishwashers using the same door seal profile.

This dishwasher door gasket seals the sides and top of the tub opening to keep water and steam contained during a cycle. Replacing a worn seal helps stop leaks at the door edges and restores quiet, efficient operation.

• Forms a watertight seal between the door and the tub perimeter
• Helps prevent dripping or puddles at the front corners and along the sides
• Maintains proper wash pressure, temperature, and noise isolation
• Replace if torn, flattened, brittle, or if moisture escapes around the door

• Disconnect power; if uninstalling the dishwasher, also shut off the water supply
• Open the door and pull the old gasket straight out of the channel
• Clean the groove; warming the new gasket in hot water can help relax bends
• Start at the top center and press the gasket fully into the channel without stretching; close the door to seat the seal and run a test cycle to check for leaks

The Pump to Sump Gasket is an OEM part for Bosch dishwashers. It serves as a seal between the dishwasher's pump and the sump, preventing water leaks during the washing cycle. This gasket is essential for maintaining the integrity of the dishwasher's internal components, ensuring that water flows where it's supposed to go without causing damage to the machine or your home.

Causes of a malfunctioning Pump to Sump Gasket can stem from normal wear and tear, as repeated exposure to water and detergent can degrade the gasket over time. Improper installation may cause the gasket not to seal properly.

Symptoms of a bad Pump to Sump Gasket include:

• Water leaking from underneath the dishwasher.
• Signs of water damage or corrosion around the pump or sump area.
• Unusual noises during operation, which may indicate water is seeping into areas it shouldn't.

This genuine OEM Bosch part is also compatible with Thermador, Gaggenau and select Kenmore models.

The Dispenser Gasket is an OEM part for Bosch dishwashers. This gasket forms a seal around the detergent dispenser, ensuring that water and detergent are properly contained within the dispenser until they are released during the wash cycle. It helps prevent leaks and ensures efficient operation of the dishwasher’s detergent system.

Causes of a bad dispenser gasket can include regular wear and tear, exposure to high temperatures, and the use of harsh detergents. 

Symptoms of a bad dispenser gasket include:

• Leaks around the detergent dispenser area
• Detergent not being dispensed properly
• Visible cracks or wear on the gasket
• Water pooling inside or outside the dispenser

This OEM Bosch part is also compatible with Thermador, Gaggenau, and some Kenmore models.

The Sealing is an OEM replacement part for Bosch brand dishwashers. Located on the perimeter of the small rinse aid compartment door, this resilient rubber piece forms an essential water-tight seal when the dispenser is closed.   

Symptoms of a potentially problematic rinse aid door sealing include:

• Leakage or spills within the rinse aid reservoir
• Mineral deposits or residue build up inside the compartment  
• Cracks, tears, or deformation of the sealing material

Causes of a faulty rinse aid door sealing can be repetitive opening/closing stress breaking down pliability long-term. Exposure to chemical vapors from the rinse aid may also degrade sealing properties.

This OEM Bosch part is also compatible with Thermador, Gaggenau, and some Kenmore models.

This door seal fits into the dishwasher's tub channel around the door opening. It compresses when the door closes to contain wash water and steam, helping prevent front-door leaks and maintain quiet, efficient operation. What it does:

• Creates a watertight seal between the dishwasher door and tub during cycles
• Helps keep water and steam from escaping; reduces operational noise
• Wear may show as drips at the door, moisture on the floor, or visible cracks/flattening
• Contributes to the door not sealing evenly

• 1 door seal

• Disconnect power and turn off the water supply before service
• Open the door, pull the old seal straight out of the channel, and clean the groove
• Warm and straighten the new seal; start at the top center and press evenly into the channel without stretching
• Close the door to help seat the seal and check for leaks on the next cycle

This upper trim strip finishes the top edge of the appliance's front opening, restoring a clean look and helping protect nearby components. Replace a cracked, missing, or loose strip to keep panels aligned and secure.

• Provides a finished edge along the upper portion of the door/face area
• Helps protect adjacent components from dust and minor splashes
• Maintains proper panel gaps and alignment
• Typical symptoms: visible cracks, warping, looseness, rattling, or exposed/sharp edges

• Disconnect power before servicing; also shut off water
• Remove the existing strip by releasing screws/clips; retain hardware for reuse
• Align the new strip and secure evenly—do not overtighten fasteners
• Check door/panel operation afterward to confirm proper fit and clearance

This O-ring is the sealing gasket between mating components, keeping fluid contained inside the system. Replacing a worn ring restores a tight, leak-free connection and helps prevent drips, moisture, and leak-related error indications.

• Creates a compressible seal between parts to prevent leaks at the joint
• Helps maintain proper system flow by stopping seepage or air ingress
• Direct replacement for rings that are flattened, cracked, brittle, swollen, or missing
• Common symptoms include dripping at the connection, moisture beneath the unit, or leak/float error alerts

• Disconnect power and shut off the water supply before servicing; wear appropriate PPE.
• Note the original ring's location; clean the groove and mating surfaces before installation.
• Apply a light coat of compatible silicone grease; avoid twisting or overstretching the ring.
• Seat evenly, reassemble, restore service, and check for leaks during a test cycle.

This O-ring seals the NTC (negative temperature coefficient) temperature sensor where it inserts into the appliance. It restores a watertight seal at the sensor port to help prevent leaks and maintain reliable temperature-sensing performance.

• Provides a leak-tight seal between the NTC temperature sensor and its housing/tub/sump
• Helps prevent water seepage and moisture intrusion around the sensor opening
• Common symptoms of a failed seal: drips near the base, moisture in the leak tray, flattened/cracked ring, or a sensor that feels loose
• Good practice to replace when the NTC sensor is removed for service

• Disconnect power and shut off water supply before servicing
• Access the NTC sensor, remove the old O-ring, and clean mating surfaces
• Lightly moisten the new O-ring with water; seat it evenly to avoid pinching, then reinstall the sensor fully
• Run a brief test cycle and inspect for leaks

This O-ring is a circular sealing gasket that creates a watertight joint between mating parts. Replacing a flattened or cracked ring restores a tight seal and helps prevent leaks during operation.

• Provides a compressible seal between fittings, hoses, or housings
• Helps prevent drips and leaks at joints under normal system pressure
• Maintains proper flow by keeping connections sealed
• Typical failure signs: visible cracking/flattening, seepage at a joint, pooling water near the appliance

• Disconnect power and shut off the water supply before servicing
• Relieve any line pressure and place a towel to catch residual water
• Clean and inspect mating surfaces; replace any damaged components
• Lightly lubricate the O-ring with approved silicone lubricant, seat evenly without twisting, and test for leaks after reassembly

Small replacement O-ring that seals the dishwasher aqua sensor assembly to maintain a watertight seal and help ensure reliable sensor operation. Fits the sensor housing to reduce leaks and protect internal electronics. What it does:

• Seals the aqua/sensor housing to prevent water from escaping the sensor area
• Helps maintain accurate sensor readings by keeping the sensor dry and properly seated
• Commonly replaced when you see water pooling or dripping near the sensor assembly
• Used during aqua-sensor, pump, or housing repairs where the original seal is damaged

• Always disconnect power and turn off the water supply before starting repairs
• Replace the O-ring only when the sensor or housing is disassembled; inspect mating surfaces for damage or debris
• Ensure the O-ring is seated evenly in its groove before reassembly to avoid pinching or leaks

This rubber gasket seals appliance openings to help prevent water and air leaks and restore proper door/tub sealing. It replaces a worn or damaged seal to reduce leaking and maintain normal appliance performance. What it does

• Creates a watertight/airtight barrier between mating surfaces to prevent leaks.
• Helps maintain operating temperature and efficiency by sealing the door/tub.
• Common symptom: visible water around the door or base during use.
• Common symptom: cracked, flattened, or distorted seal material that no longer compresses.
• Works as a direct replacement for the matching OEM seal when damaged or worn.

• One gasket as shown on the product page.

• Turn off power and water supply to the appliance before starting any repair.
• Remove the old seal carefully, clean the mounting channel of debris and residue, and inspect the mating surface.
• Press the new gasket evenly into the channel, starting at one corner and working around to ensure full seating without twists.
• Test the door closure and run a short cycle to confirm there are no leaks; re-seat if necessary.