Appliance Spares
Quick answer: The most common faults on Bosch Serie 8 WAW-series front loaders (WAW28460AU, WAW28420AU, WAW28440AU, WAW28441AU) and the closely related WAP28380AU are a failed drain pump ($49.95 with the built-in filter), a leaking or mouldy door seal ($89.95), and a worn door interlock switch ($34.75). All are in-stock parts shipped from Sydney’s Northern Beaches.
Not sure which one fits? Match your model number or check the sticker inside the door.
Drain Pump with Filter 00145093 — $49.95 ·
Door Seal Gasket 00772663 — $89.95 ·
i-DOS Door Seal — $43.00 ·
Door Interlock Switch — $34.75 ·
Dual Inlet Valve 10010823 — $59.95 ·
Analogue Pressure Sensor — $39.95 ·
Drive Belt 1255J5 — $23.95 ·
Not sure which part? Use the Part Finder
Common faults on Bosch Serie 8 WAW and WAP washing machines
The Bosch Serie 8 WAW range — WAW28460AU, WAW28420AU, WAW28440AU and WAW28441AU — shares its platform with the WAP28380AU and WAP28482AU, so most wear parts interchange across the family. These are premium German-built front loaders, and when they do develop a fault it is usually one of a handful of predictable wear items: the drain pump, the door seal, the door interlock switch, or the water inlet valve. Because the platform is shared, one parts page covers the whole family — the fitment list on each product confirms exactly which model variants it suits.
Before ordering parts, locate the model sticker on the door jamb (the frame exposed when you open the door). Bosch model numbers include a variant suffix after the slash — for example WAW28460AU/01 and WAW28460AU/23 can take different valves — so note the full model number including the digits after the slash and match it against the listing’s fitment list before ordering.
| Part | Symptom | Price | Link |
|---|---|---|---|
 Drain pump with filter | Water remaining in the drum at the end of the cycle; drain-related error code on the display; humming from the bottom front of the machine but no water movement | $49.95 | Buy drain pump 00145093 |
 Door seal gasket | Water leaking from the front of the machine during the wash; visible black mould growth on the rubber; cracks or splits in the folds of the boot seal | $89.95 | Buy door seal 00772663 |
 Door seal (i-DOS models) | Same leak and mould symptoms on i-DOS variants of the WAW28460AU and the related WAS28440AU — match your full model number to the fitment list | $43.00 | Buy i-DOS door seal |
 Door interlock switch | Door won’t lock at the start of a cycle; machine refuses to start; door stays locked after the cycle finishes | $34.75 | Buy door interlock switch |
 Dual water inlet valve | Machine not filling, filling very slowly, or filling when switched off; fill-related error code on the display | $59.95 | Buy inlet valve 10010823 |
 Analogue pressure sensor | Overfilling or underfilling; machine stopping mid-cycle with the drum full; erratic water levels between cycles | $39.95 | Buy pressure sensor |
 Drive belt | Drum not turning while the motor runs; squealing on start-up or during spin; washing still soaked because the drum never reached spin speed | $23.95 | Buy drive belt 1255J5 |
WAP28380AU and WAP28482AU owners with a drain fault can also use the matching drain pump with filter for WAP28380AU and WAP28482AU at $49.95 — it is the same pump-and-filter assembly listed against those model numbers.
Diagnosis guide – Bosch Serie 8 WAW / WAP
- Note any error code first. Bosch Serie 8 machines report faults on the display. A drain-related code points to the pump or a blocked filter; a fill-related code points to the inlet valve or water supply; a door code points to the interlock switch. Write the code down before doing anything else — it narrows the fault immediately. Our Bosch not-draining guide walks through the drain codes step by step.
- Check the drain pump filter. If water is left in the drum, open the small access flap at the lower front, drain the water, and unscrew the filter. Coins, hair pins and lint stop these pumps far more often than the pump actually fails. If the filter is clear and the pump hums without moving water, the pump has failed — the replacement includes a new filter.
- Inspect the door seal. Run your fingers around the full circumference of the rubber boot, especially the lower folds where water pools. Any split, tear, or mould penetration deeper than the surface layer means replacement — see the Bosch door seal leak guide for the full test.
- Test the door lock. Close the door firmly and press Start. If the machine does not click the lock in and begin filling, or the door stays locked well after the cycle ends, the interlock switch is the usual culprit on this platform.
- Watch the fill. If the machine fills slowly, not at all, or keeps filling past the normal level, isolate the taps and check the inlet hoses first. With good supply confirmed, a slow or continuous fill points to the dual inlet valve; erratic levels point to the analogue pressure sensor.
- Check the drum turns with the motor. If the motor is audibly running but the drum stays still, or you hear squealing under load, the drive belt has stretched or come off the pulley. Spin the drum by hand — no resistance at all usually means the belt is off or broken.
Fitting the parts yourself
The drain pump, door seal, interlock switch and inlet valve are all accessible repairs on this platform. The pump sits behind the lower front panel and is a common first repair for handy owners; the interlock switch is reached by peeling back the door seal lip at the latch side; the inlet valve is behind the rear top panel where the hoses enter. The door seal itself takes more patience — the outer retaining ring must be reseated evenly — but it is a job most people with basic tool skills can finish in under an hour.
The analogue pressure sensor and drive belt require removing the top or rear panel and carefully routing the new part. None of these repairs need special tools beyond a Torx driver set and pliers. Always unplug the machine and isolate the taps before starting, and photograph connector positions before unplugging anything. If you would rather not open the cabinet, any appliance technician can fit these parts — the parts prices above mean the component cost stays modest either way.
Frequently asked questions
Do WAP28380AU parts fit the WAW28460AU?
Many do — the two machines share the same platform, and parts such as the drive belt and pressure sensor list both models in their fitment. The drain pumps are listed separately by model group, so match the listing to your model sticker. When a listing names your exact model and variant suffix, it fits.
Why is my Bosch Serie 8 not draining?
Check the drain pump filter behind the lower front flap first — a blocked filter is the most common cause and costs nothing to fix. If the filter is clear and the pump hums without pumping, replace the drain pump; it comes with a new filter housing. The Bosch not-draining guide covers the whole sequence.
Which door seal does my machine take?
It depends on the exact model and variant suffix on your model sticker. The seal listed for WAW28441AU/12 and WAW28790/01 differs from the seal for i-DOS variants of the WAW28460AU and WAS28440AU. Check the fitment list on each product page against your full model number, or use the Part Finder if you are unsure.
Where is the model sticker on a Bosch front loader?
On the door jamb — the frame exposed when you open the washing machine door. It shows the full model number including the variant suffix after the slash (for example /01 or /23), which matters for valve and seal fitment on this family.
Is a Serie 8 worth repairing?
Almost always. These are premium machines with a high replacement cost, and every common wear part on this page is under a hundred dollars. Even paying a technician to fit a pump or seal is a fraction of the cost of a comparable new machine, and the drum, motor and electronics on this platform routinely outlast several sets of wear parts.
Related
- Bosch washing machine not draining — which part fixes it
- Bosch washing machine leaking from the door seal
- Bosch WAU28490A washing machine parts
- Part Finder Quiz — enter your model number for matched results
- Browse all WAW28460AU parts
- Browse all WAP28380AU parts
Ready to fix it?
- Locate the model sticker on your door jamb and note the full model number including the suffix after the slash.
- Note the fault or error code displayed on the machine.
- Select the matching part from the table above, or use the Part Finder if you’re unsure.
- Add to cart at ozappliancespares.com.au — orders placed before the daily cut-off ship same day from Sydney’s Northern Beaches.
Disclaimer: this article is general information only and is provided without warranty of any kind. Appliance designs vary between models and production runs — always follow the manufacturer’s instructions, switch off and unplug the appliance before starting any work, and confirm parts against the model number on your appliance’s model sticker. Any repair is undertaken at your own risk and Oz Appliance Spares accepts no liability for injury, loss or damage arising from work performed after reading this guide, to the maximum extent permitted by law. If in doubt, use a qualified technician.
