Bosch Dishwasher Not Draining: Every Cause Covered

Quick Answer

A Bosch dishwasher that leaves standing water has six possible causes. In order of likelihood: clogged triple filter system, kinked drain hose, blocked pump impeller (E25), garbage disposal knockout plug not removed, clogged air gap, and failed check valve. Start with the filter - it takes 2 minutes and resolves the problem in about half of all cases. If your dishwasher shows E24 or E25, those dedicated guides have more detail.

BoschDishwasherSeverity: low

Time to Fix

5–90 min

Difficulty

beginner

Parts Cost

$12 – $35

Tools Needed

Soft brush, Flashlight

Wrong code?

Not seeing SYMPTOM on your display?

Select what your appliance is actually doing and we'll take you to the right guide.

drain path blocked

E24

pump impeller blocked

E25

drain pump motor failure

What Does the SYMPTOM Code Mean?

Bosch dishwashers can fail to drain with or without an error code. The triple filter system is the first line of defense and the first thing to check. Beyond that, the drain path includes the pump, hose, high-loop or air gap, and the standpipe or garbage disposal connection. Each of these is a potential blockage point. This guide covers scenarios where the dishwasher has standing water but the cause has not yet been identified.

Most Likely Causes

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

Clogged triple filter (most common)40%

Kinked drain hose24%

Blocked pump impeller (E25)14%

Clogged air gap at sink12%

Garbage disposal knockout plug not removed10%

Symptoms You May Notice

Standing water at bottom of dishwasher after cycle
E24 or E25 error code
Water drains slowly over 30-60 minutes post-cycle
No error code but dishwasher shows wet dishes and standing water

Can you reset a Bosch dishwasher to clear the SYMPTOM code?

After resolving the drain blockage, hold Start/Reset for 3-5 seconds to trigger a drain cycle. Confirm all water is cleared before starting the next wash cycle.

Tools Required for Diagnosis

Soft brushFlashlightTowels

Diagnostic Checklist

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

Check the filter first (2 minutes)

Remove the cylindrical filter by turning counterclockwise, then lift out the flat mesh filter. Rinse both under hot running water with a soft brush. If the mesh is visibly clogged with grey sludge or food residue, this is the cause. Reinstall and run a test rinse cycle.

Inspect the drain hose and high loop

Check the garbage disposal connection

Check the air gap (if installed)

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	OEM Number	Estimated Price
Triple Filter Assembly00701754 · $18–$35	00701754	$18 – $35
Check Valve / Non-Return Valve00630200 · $12–$25	00630200	$12 – $25

Verify part fitment for your Bosch model

Repair vs. Replace Calculator

Appliance Age (Years)7 Yrs

Labor Approach

Our Verdict

REPAIR

Estimated Cost: $24 (Parts) vs $650 (New Machine)

Frequently Asked Questions

Bosch dishwasher has standing water but no error code. Why?

E24 requires a certain threshold of drain failure before it triggers. If the drain is partially blocked, water may still move slowly enough that the sensor does not trigger an error code, but the cycle ends with residual water. A clogged filter that still allows some flow is the most common cause of no-code standing water.

How high should the Bosch drain hose loop be?

The drain hose should loop up to within 2 inches of the underside of the countertop before descending to the standpipe or disposal. This high loop (or air gap device) prevents back-siphon from the sink from flowing back into the dishwasher. The loop should be secured with a hose clip, not just hanging freely.

New garbage disposal and now my Bosch won't drain. What happened?

When a garbage disposal is installed new, the dishwasher inlet port on the side of the disposal comes with a plastic knockout plug that must be punched out before connecting the dishwasher drain hose. Many plumbers forget this step. Disconnect the drain hose from the disposal and check the inlet port - if you see a flat plastic disc, knock it out with a screwdriver.

Bosch dishwasher drains into the sink. Is that normal?

A small amount of drain water coming up through the sink when the dishwasher drains is normal and indicates the drain line is correctly connected to the garbage disposal or drain under the sink. However, if the sink fills significantly or drains back into the dishwasher, the drain hose high loop is missing or incorrectly installed.

Related Bosch Dishwasher Error Codes

Code: E24Bosch E24 Error: Drain Problem Solved Code: E25Bosch E25 Code: Drain Pump Fix Code: E23Bosch E23 Code: Drain Motor Failing Code: E15Bosch E15: Fix the Anti-Flood Alert Fast

Same Fix on Other Brands

Miele dishwasherF11: Miele Dishwasher Won't Drain: F11 Fix

Same Fix Works on These Brands

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

Bosch dishwasherBosch Dishwasher E15: Fix the Anti-Flood Alert Fast Bosch dishwasherBosch Dishwasher Error Codes: Complete List + Fixes Bosch dishwasherHow to Reset a Bosch Dishwasher (Every Method)Bosch dishwasherBosch E24 Error: Drain Problem Solved Step by Step Bosch dishwasherBosch E25 Code: Drain Pump Fix Without a Technician Bosch dishwasherBosch E22 Error: Why Your Dishes Aren't Getting Clean

Models Known to Experience SYMPTOM Errors

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

SHPM88Z75N, SHPM88Z55N, SHPK7ZL55N, SHE3AR75UC, SHEM63W55N, SHPM65Z55N, SHE3AR72UC, SHDF78Z55N, SHEM78ZH5N, SHPM98Z75N

Last verified for technical accuracy on March 14, 2026