Warning: Disconnect power before servicing.

Bosch Washer Leaking: AquaStop Protection and Door Boot Seal Fix

Quick Answer

Bosch washer leaking: place paper towels around the machine and run a cycle to find where the water is coming from. Front = door seal or dispenser. Rear = hose connection or valve. Bottom = pump or tub seal. Identifying the location narrows the repair to one or two parts.

Bosch washers have AquaStop - a double-walled inlet hose with electronic shut-off that stops water flow if a leak is detected anywhere in the system. Bosch AquaStop is more advanced than Frigidaire's version: it includes a sensor in the inlet hose itself (not just the base pan). If the AquaStop indicator on the inlet hose shows red (visible through a small window), the hose has detected a leak and shut off water. This can sometimes trigger falsely from condensation in cold laundry rooms. To reset: unplug the washer, disconnect the inlet hose, drain any water from the hose, reconnect, and plug in. Bosch door boot seals use a higher-grade silicone than consumer brands and last longer, but they can still collect debris in the fold. The Bosch-specific leak: the detergent dispenser tray has a siphon mechanism that can clog with dried detergent, causing water to overflow from the dispenser during fill.

BoschWasherSeverity: mediumDifficulty: intermediate75% DIY Success
Time to Fix
15–90 min
Difficulty
intermediate
Parts Cost
$40 – $70
Tools Needed
Multimeter, Screwdriver

What Does the LEAKING Code Mean?

Bosch leaking: AquaStop on inlet hose (red indicator = leak detected, may be false from condensation).

Most Likely Causes

Based on aggregated repair data, here is the probability breakdown for this error code:

Door seal or gasket torn or displaced40%
Overfill from stuck-open inlet valve24%
Drain hose connection loose at pump or drain14%
Tub seal leaking at drum shaft12%
Pump housing cracked10%

Symptoms You May Notice

  • Appliance leaking
  • Performance issue
  • May show error code

Can you reset a Bosch washer to clear the LEAKING code?

Unplug 60 seconds. Plug in and test.

Tools Required for Diagnosis

MultimeterScrewdriverFlashlight

Diagnostic Checklist

Follow these steps in order. We start with the easiest external fixes before opening up the machine.

1

Check the most common cause described in the guide above.

Check the most common cause described in the guide above.

2

Check secondary causes and error codes if displayed.

3

If basic checks fail, consult a professional or run manufacturer

Replacement Parts

If your diagnostic testing proves the component has failed, you will need a replacement. We recommend OEM parts over aftermarket for water-handling components.

Part Name
Bosch AquaStop Inlet HoseModel-specific · $40–$70

Repair vs. Replace Calculator

Appliance Age (Years)7 Yrs
Labor Approach
Our Verdict
REPAIR
Estimated Cost: $55 (Parts) vs $1400 (New Machine)

Frequently Asked Questions

How much does Bosch washer leaking repair cost?
Most repairs cost $100-400 depending on the component. Simple fixes like cleaning or resetting are free.
Is my Bosch washer worth repairing?
If under 10 years old and repair is under 50% of replacement cost, repair is worthwhile.
Can I fix this myself?
Many fixes are DIY with basic tools. Gas and sealed-system repairs need a professional.

Same Fix Works on These Brands

Bosch shares the same hardware platform with these brands. The diagnosis and repair steps are identical.

Models Known to Experience LEAKING Errors

This repair applies to most Bosch washers with this error code. Common model numbers include:

WAW285H2UC, WAT28402UC

Last verified for technical accuracy on March 15, 2026