Bosch Dishwasher E24 Error: What It Means and How to Fix It

E24 on a Bosch dishwasher means the drain cycle did not complete. A clogged filter basket is the cause in most cases. If the filter is clear, the drain pump or heat pump needs a pro.

What E24 Means on a Bosch Dishwasher

The Bosch dishwasher E24 code is a drainage fault. When this Bosch dishwasher error code E24 appears, water has not been pumped from the tub in time. One detail most guides miss: the heat pump runs before drain pump activation to sense water in the sump. A failing heat pump triggers a false E24 before the drain phase starts. The Bosch dishwasher not draining E24 symptom almost always traces to the filter basket. A decision-gate filter structure orders the seven causes by probability; most cases of Bosch dishwasher code E24 resolve with a 15-minute clean.

Cause-by-Cause Diagnosis: Filter to Pump Motor

Cause 1: Clogged Filter Basket

Restricted water flow through the filter basket is the most common reason a Bosch dishwasher error E24 appears. The cylindrical mesh filter at the tub bottom captures food debris over time. When clogged, the drain pump cannot pull water through fast enough and the control board registers a drainage fault.

Denver hard water note: Denver Metro water hardness runs 75 to 175 mg/L, with Arvada, Lakewood, Golden, and Westminster reaching 200 mg/L or higher. Mineral scale clogs filter mesh and bonds to food particles, compounding the blockage. Standard guidance says every three to six months. Denver hard water monthly filter cleaning is the realistic interval for local homes. Fix: twist the filter basket counterclockwise, lift it out, rinse under warm water with a soft brush, and reseat firmly.

Nine times out of ten when I see E24, the filter basket has not been cleaned in months. Clearing it takes five minutes. The pump motor almost never needs replacing.

Daniel OwensDishwasher Repair Technician, Wilson and Myers

Cause 2: Kinked or Blocked Drain Hose

A kinked drain hose stops the drain pump completely. The corrugated hose runs from the drain pump through the cabinet to the sink drain or garbage disposal connection. Kinks form at the cabinet back panel or where stored items compressed the hose. Straighten the full run. For a broader drain-path inspection, see Bosch dishwasher drainage issues.

Cause 3: Debris in the Drain Pump Impeller

Glass fragments or cherry pits jammed in the impeller block the drain pump completely. After removing the filter basket, the pump cover is visible at the sump base. Remove the cover and spin the impeller by hand. The impeller spins freely test confirms the pump is clear; any drag or grit signals jammed debris. Clear the obstruction, confirm free rotation, and replace the pump cover firmly.

Cause 4: Loose Pump Cover

The pump cover must seal tightly for the drain pump to build pressure. A loose or misaligned cover after a filter cleaning produces E24 without any other fault. The pump cover reseating fix resolves E24 on many machines without part replacement. Press it firmly until it seats. A cracked cover needs replacement.

Cause 5: Siphon, Air Gap, and Plumbing-Side Blockages

E24 sometimes starts outside the dishwasher. The siphon connection where the drain hose meets the sink drain can clog with grease. An air gap on the countertop clogs often. Without one, a high loop under the counter prevents backflow. A factory siphon knockout plug left in a newly installed garbage disposal blocks drainage completely: check your dishwasher installation records if E24 appeared right after that work. Many older Denver homes also have a shallow old Denver plumbing P-trap that backs up dishwasher drain.

Cause 6: Heat Pump Fault (False E24)

A failing relay or thermistor produces a false E24 from heat pump malfunction before the drain phase begins. If all five DIY causes check out and E24 persists after a power reset, the heat pump false E24 diagnosis requires a pro.

Cause 7: Drain Pump Motor Failure

A clear impeller and tight pump cover, but motor silence during the drain phase points to drain pump motor failure. No hum, no vibration. A multimeter continuity test confirms the Bosch dishwasher E24 drain pump fault: probe the motor terminals with the connector unplugged. No continuity means the motor windings have failed. We source Bosch replacement parts through national supplier networks and manufacturer contracts. Motor replacement requires partial disassembly and is not a DIY repair.

How to Clear the E24 Code: Step-by-Step

The E24 code clears automatically when the blockage is gone. No manual reset sequence exists. These steps show how to clear E24 error on Bosch dishwasher models, ordered by likelihood. Step 1 alone resolves most codes in under five minutes; move to Step 2 if E24 persists.

1. Power off the dishwasher at the circuit breaker or unplug it before reaching into the pump area.
2. Remove standing water from the tub with a towel or cup.
3. Pull the bottom rack free. Twist the filter basket counterclockwise, lift out, and rinse under warm water with a soft brush.
4. Remove the pump cover, spin the impeller to confirm free rotation, and clear any debris. Reseat the pump cover firmly.
5. Inspect the drain hose for kinks along its full run under the cabinet.
6. Check the siphon connection, air gap, and under-sink drain for blockage. Confirm the garbage disposal knockout plug was removed if the disposal is new.
7. Restore power and run a rinse cycle to confirm the code does not return.

If E24 returns after all seven steps, the fault is the heat pump or drain pump motor. Knowing how to fix E24 error on Bosch dishwasher models ends at Cause 5. Call a pro.

Related Bosch Dishwasher Error Codes

E15 is an AquaStop leak detection event, not a drain fault: our Bosch E15 error guide covers the full diagnosis. Catching E24 early matters: a blocked drain pump running against restriction will eventually fail the motor. E22 points to a filter or spray arm obstruction and often clears with the same filter clean that fixes E24. E25 is a more serious drain fault, an escalation when E24 went unresolved. Thermador same platform as Bosch extends to Gaggenau: E24, E22, E25, and E15 carry identical definitions and fixes across all three brands.

When to Call Wilson and Myers

If Causes 1 through 5 are all clear and E24 still shows after a five-minute power disconnect, the repair moves beyond DIY. A silent motor despite a clear impeller is another threshold. When the Bosch dishwasher E24 error returns monthly, mineral scale from harder Denver Metro water has likely reached the pump assembly.

Machines under three years old warrant professional diagnosis: component work in that window can affect warranty. In my experience, when homeowners reach this point, the fault is mechanical, not a cleaning issue.

Our insured technicians handle dishwasher repair and Bosch dishwasher repair across Denver Metro. Schedule a dishwasher repair in Denver and we will confirm availability for your neighborhood.

Wilson and Myers provides dishwasher repair and Bosch drain fault diagnosis across Denver Metro Area, including Denver, Boulder, Lakewood, Aurora, Littleton, Englewood, Sheridan, Wheat Ridge, Edgewater, Golden, Arvada, Westminster, Thornton, Northglenn, Commerce City, Brighton, Broomfield, Superior, Louisville, Lafayette, Longmont, Erie, Centennial, Greenwood Village, Cherry Hills Village, Glendale, Parker, Castle Rock, Highlands Ranch, Lone Tree, and Morrison.

Frequently Asked Questions

What does E24 mean on a Bosch dishwasher?

E24 on a Bosch dishwasher means the machine cannot pump water out of the tub. The control board detected that the drain phase did not complete in time. A clogged filter basket causes it in most cases. Clear the filter, confirm the impeller spins freely, and run a rinse cycle.

Why does my Bosch keep showing E24?

Recurring E24 means the filter basket re-clogs faster than expected. In Denver Metro homes, hard water mineral scale bonds to food debris and rebuilds in weeks, not months. Monthly cleaning stops most recurring E24 faults. If E24 persists after monthly cleaning, scale has reached the pump assembly and a pro inspection is needed.

Is E24 a drain problem?

Yes. The E24 error Bosch dishwasher displays is a drainage fault: the control board could not confirm that water cleared the tub in time. Every cause sits in the drain path, from the filter basket through the drain hose, impeller, pump cover, and siphon connection to the drain pump motor. Bosch E24 is not a heating error or sensor fault.

Can I fix E24 myself?

For Causes 1 through 5 (filter, hose, impeller, pump cover, siphon or air gap), yes. Most homeowners fix E24 Bosch dishwasher faults in under 20 minutes. Causes 6 and 7 (heat pump malfunction and drain pump motor failure) require professional diagnosis. When DIY checks come up clean and E24 persists, call an insured technician.

How do I clear the E24 code?

To clear E24 error on a Bosch dishwasher: remove standing water, clean the filter basket, clear the impeller of debris, and reseat the pump cover. The code clears automatically when the blockage is gone. No manual key sequence exists for E24. A five-minute power disconnect can clear a false or intermittent E24, but if the blockage remains the code returns on the next cycle.

How to reset Bosch dishwasher after E24?

To reset a Bosch dishwasher after E24, resolve the drainage blockage first. The code clears automatically on the next successful drain cycle. No button combination exists. For a false E24 from a heat pump glitch, disconnect power for five minutes. If E24 returns, the blockage was not resolved.