Short answer: E24 means the Bosch dishwasher cannot pump water out in time. The usual causes are a clogged filter, a blocked or kinked drain hose, a plugged air gap or disposal knockout, or a failing drain pump. Clear the drain path first.
Start with the Filter and Hose
The most common E24 cause is a clogged filter or a restricted drain hose. Food debris and grease build up in the filter basket and the corrugated hose, slowing the drain until the control times out and posts E24. Cleaning the filter and clearing the hose resolves a large share of these.
The Air Gap and Disposal
If the dishwasher drains into a disposal or through a countertop air gap, a plugged air gap or a disposal knockout plug left in place will block the drain. We check these external points, which owners often overlook, before condemning the pump.
The Drain Pump
If the path is clear and the dishwasher still will not drain, the drain pump itself may be failing or jammed with debris such as glass or a seed. We test the pump and clear or replace it. Confirming a full drain on a test cycle closes the repair.
Error & Symptom Reference
| Cause | Sign | Fix |
|---|---|---|
| Clogged filter | Standing water, slow drain | Clean filter |
| Blocked drain hose | No/slow drain | Clear or replace hose |
| Plugged air gap/disposal | Backing up at sink | Clear air gap/knockout |
| Failed drain pump | No drain, path clear | Test/replace pump |
What to Check Before Booking
Testing beats guessing here, because a Bosch fault often traces back to more than one possible cause. Our technician isolates the circuit on the Bosch unit, tests the suspect parts, and replaces only what has actually failed. Mention any recent power events or spills, since those can point straight to the cause. We service faults like this throughout the Greenwood Village area, always with a written estimate before any work begins.
Want This Handled for You?
Book a diagnosis. Diagnostic and travel fees, if applicable, are confirmed before the appointment and before repair approval.