Get free shipping on your order, with any water filter subscription. Find my filter

Open Hamburger Menu
Sears Parts Direct
Tips to find your model number

Bosch WAT28400UC/20 washer Parts

Here are the diagrams and repair parts for Bosch WAT28400UC/20 washer, as well as links to manuals and error code tables, if available.

Bosch WAT28400UC/20 washer
By Schematic
By Part
SELECT DIAGRAM
?

This is the number corresponding to the part on the diagram / schematic

Browse Parts for WAT28400UC/20 WASHER

Bosch WASHER WAT28400UC/20 FAQs

Yes, Bosch washers like the WAT28400UC are typically worth the money if you want strong cleaning performance, high efficiency, and long-term reliability in a front-load design. The best value comes from using the right cycles, keeping the drain system clean, and following the care steps in the owner's manual.

What you’re paying for with a Bosch front-load washer
  • Efficient water and energy use compared with many older washers
  • Strong spin performance that helps reduce drying time
  • Quieter operation and solid build quality in many Bosch designs
  • Good fabric care when you match cycle, temperature, and load size
  • Serviceable components when wear items eventually need replacement
When it’s a good value (and when it isn’t)

Bosch is a good value when you prioritize efficiency, lower vibration, and consistent results. It can feel less “worth it” if you mainly want the lowest upfront price or you do lots of bulky loads that need a larger-capacity machine.

If you care most about… Bosch front-load washers are usually a good fit when…
Lower utility use You run frequent loads and want efficiency over time
Better water extraction You want faster dry times after washing
Fewer odor issues You’re willing to do basic maintenance and leave the door ajar
Repairability You prefer replacing a part instead of replacing the washer
Maintenance that protects your investment

Front-load washers deliver the best long-term value when you prevent drain clogs and odor.

  • Clean the pump filter regularly; a restricted filter can cause slow draining and error codes
  • Use the correct detergent amount (too much can cause residue and odors)
  • Wipe the door boot and leave the door slightly open between loads
  • Run a periodic cleaning cycle (hot cycle with a washer cleaner, if recommended)
  • Address draining issues early; a failing pump can lead to standing water

If your washer won’t drain or leaves water behind, common repair paths include cleaning the filter or replacing the washer drain pump filter 00647920 or the washer drain pump 00145753. For model-specific cycle and care guidance, use the owner's manual.

Why it matters

A premium washer only pays off if it stays efficient and trouble-free. Simple upkeep (especially drain and door-boot care) helps prevent the most common front-load complaints like odors, slow draining, and vibration.

Last updated: February 2026

A Bosch washing machine like model WAT28400UC typically lasts 12 to 15 years with normal household use. With heavy, daily loads it commonly lands closer to 10 to 12 years; with lighter use and consistent care, 15 years is a realistic expectation.

Typical lifespan by usage
  • Light use (1 to 3 loads/week): about 14 to 16 years
  • Average use (4 to 7 loads/week): about 12 to 15 years
  • Heavy use (8+ loads/week): about 10 to 12 years
  • Hard water or frequent overdosing detergent: shortens life by increasing buildup
  • Good maintenance habits: extends life by reducing strain on the drain system and bearings
Usage pattern What wears fastest What to do to extend life
Heavy family use Drain pump, belt, shocks Clean pump filter, avoid overloading
Lots of small loads Door boot, dispenser, drain system Leave door ajar, run monthly cleaning cycle
Hard water area Valves, hoses, internal buildup Use correct detergent amount, periodic cleaning
What matters most for longevity

The biggest life drivers are load size, how well the washer drains, and how clean the tub and door seal stay. A front-load washer that regularly sits wet or struggles to drain tends to develop odors, leaks, and pump issues sooner.

Maintenance that pays off (quick checklist)
  • Clean the drain pump filter regularly; clogs force the pump to work harder (see washer drain pump filter 00647920).
  • Check pockets and use a mesh bag for small items to reduce debris in the drain system.
  • Use the right amount of HE detergent; too much creates residue and odors.
  • Leave the door and dispenser slightly open between loads to dry out the door boot.
  • Inspect the drain hose routing for kinks or crushing (see washer drain hose 00656689).
When repair makes sense vs replacement

In the 10 to 15 year range, repairs are most worthwhile when the fix is limited to common wear items.

  • Common, fixable wear items: drain pump, drain hose, drive belt
  • Higher-cost repairs: control boards, motor, major tub or bearing issues

For model-specific care and cleaning steps, follow the owner's manual. If you need replacement parts for WAT28400UC, we list model-matched parts on this page, and you can also search by model on Sears PartsDirect.

Last updated: February 2026

For Bosch washers like model WAT28400UC, the most common problem we see is drainage trouble: the washer will not drain fully, will not spin out, or stops with water left in the drum. Cleaning the pump filter and checking drain hose routing often fixes it; follow the WAT28400UC owner's manual.

Most common symptoms (and what they usually mean)
  • Water left in the drum: clogged pump filter, blocked drain path, or a failing drain pump
  • Won’t spin or ends early: the washer cannot drain fast enough, or the load is unbalanced
  • Slow draining: partial blockage in the drain hose or pump filter
  • Gurgling or grinding during drain: debris in the filter or pump
Quick checks and likely parts
  1. Unplug the washer.
  2. Check the drain hose for kinks and correct standpipe depth.
  3. Clean the pump filter; replace it if cracked or leaking using the washer drain pump filter 00647920.
  4. Run a Drain/Spin cycle empty.
  5. If it still will not drain, replace the pump using the washer drain pump 00145753.
What you notice vs. what to do
What you notice Most likely cause Best next step
Won’t drain, no pump sound Drain pump not running Check wiring; replace pump if needed
Won’t drain, pump sounds strained Filter or hose blockage Clean filter; correct hose routing
Loud shaking in spin Unbalanced load or leveling Rebalance load; level the washer
Why it matters

Drainage problems stop the spin cycle, leave clothes soaking wet, and strain the drain pump. Clearing clogs early helps prevent repeat no-drain issues and reduces wear on hoses and the pump.

You can order replacement parts from the parts list for this model, or search by model number on Sears PartsDirect.

Last updated: February 2026

Most common symptoms to help you fix your washers

Choose a symptom to see related washer repairs.

Main causes: clogged drain hose, house drain clogged, bad drain pump, water-level pressure switch failure, bad control b…

Main causes: broken lid switch or lid lock, bad pressure switch, broken shifter assembly, faulty control system…

Main causes: worn agitator dogs, bad clutch, broken motor coupler, shifter assembly failure, broken door lock, suspensio…

Main causes: water heater failure, bad water temperature switch, faulty control board, bad water valve, faulty water tem…

Main causes: lack of electrical power, wiring failure, bad power cord, electronic control board failure, bad user interf…

Main causes: no water supply, bad water valves, water-level pressure switch failure, control system failure, bad door lo…

Main causes: unbalanced load, loose spanner nut, worn drive block, broken shock absorber or suspension spring, debris in…

Main causes: leaky water inlet valve, faulty water-level pressure switch, bad electronic control board…

Main causes: bad lid switch or door lock, bad timer or electronic control board, wiring failure, bad water inlet valve a…

Repair guides for electric ranges

How to replace an oven temperature sensor on an electric range

How to replace an oven temperature sensor on an electric range

These step-by-step instructions guide you through replacing an oven temperature sensing probe.…

Repair time and Difficulty

 15 minutes or less
How to replace an electric range oven control board

How to replace an electric range oven control board

If the electronic oven control board isn't powering the bake and broil functions, you can replace it in less than half a…

Repair time and Difficulty

 15 minutes or less
How to replace a range surface element control switch

How to replace a range surface element control switch

The surface element control switch lets you turn the stovetop elements on and off, and to set the heat level. These step…

Repair time and Difficulty

 15 minutes or less

Effective articles & videos to help repair your washers

Use the advice and tips in these articles and videos to get the most out of your washer.

How auto-load sensing washers work (and when they don't)

How auto-load sensing washers work (and when they don't)

Your washer barely fills or seems stuck in sensing mode? Find out how auto-load sensing and Precise Fill features work, …

How to remove the main control board and user interface from a Maytag Epic Z front-load washer

How to remove the main control board and user interface from a Maytag Epic Z front-load washer

Get step-by-step instructions for removing the main electronic control board and the control panel from a Maytage Epic Z…

Using a wiring schematic to trace a current video

Using a wiring schematic to trace a current video

Find out what’s wrong with your appliance by following a circuit.…