Thermador E24 — Drain blocked — water not evacuating after cycle

What Thermador E24 error means on your dishwasher

Thermador dishwasher error code E24 indicates: Drain blocked — water not evacuating after cycle. This is classified as a Medium-severity issue — the appliance may continue operating but should be serviced soon.

What E24 means

E24 indicates the dishwasher cannot drain water within the expected timeframe. The drain pump may be running but water remains in the tub.

Common causes

Clogged drain filter (most common), kinked drain hose, blocked garbage disposal knockout plug, or faulty drain pump motor.

Troubleshooting steps

1. Remove and clean the drain filter at the bottom of the tub. 2. Check the drain hose under the sink for kinks. 3. If connected to a garbage disposal, verify the knockout plug was removed during installation. 4. Run a rinse cycle to test. If still draining slowly, the drain pump may need replacement.

When to call a technician

If cleaning the filter and checking the hose doesn’t resolve E24, the drain pump motor or check valve likely needs replacement — both require disassembly.

Error E24 quick reference

• Error code: E24
• Appliance type: Thermador Dishwasher
• Severity: Medium
• Repair type: DIY-friendly
• Affected components: Drain filter, drain hose, drain pump, air gap

Troubleshooting Thermador E24 step by step

1. Power reset: Turn off the appliance at the circuit breaker for 5 minutes, then restore power. If E24 clears and doesn’t return, a transient electrical issue caused it.
2. Visual inspection: Check for obvious issues — loose connections, visible damage, water leaks, or unusual sounds from the affected components (Drain filter, drain hose, drain pump, air gap).
3. Document the error: Note when E24 first appeared, whether it’s constant or intermittent, and any other symptoms (sounds, smells, performance changes).
4. Check related systems: Error codes can sometimes be triggered by adjacent systems — verify that water supply, electrical connections, and ventilation are functioning normally.

Professional diagnosis and repair

If E24 persists after a power reset, professional diagnosis is required. Our certified Thermador technicians use factory diagnostic tools to read stored error history, test individual components (Drain filter, drain hose, drain pump, air gap), and identify the exact failure point.

Repair typically involves:

• Retrieving and analyzing stored fault codes from the control board
• Component-level testing of the Drain filter, drain hose, drain pump, air gap
• Replacing failed components with genuine Thermador OEM parts
• Verifying the repair by running a test cycle and confirming the error clears

Preventing Thermador E24 from recurring

While some component failures are age-related and unavoidable, regular maintenance reduces the likelihood of error E24 recurring:

• Follow the maintenance schedule in your Thermador owner’s manual
• Keep the appliance clean — debris and buildup accelerate component wear
• Address minor issues early — small problems left unrepaired often trigger error codes
• Use a surge protector — power fluctuations can damage electronic control boards

For complete specifications and troubleshooting documentation, visit the Thermador official site. To schedule certified Thermador dishwasher repair, Schedule service online — we service all Thermador models in all 50 states with genuine OEM parts and a 30-day labor warranty.