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Appliance Error Codes

Bosch SHPM88Z75N E24 Error Code | E24 Drainage Blocked

Error e24 on Bosch shpm88z75n: Drainage blocked — dishwasher cannot drain due to blocked filter, kinked hose, o. Follow the troubleshooting steps below to diagnose and fix this dishwasher issue. ## What Does E24 Mean on a Bosch SHPM88Z75N? Your Bosch dishwasher is displaying an E24 error code, which means the dishwasher is unable to drain water at the end of a wash phase. E24 indicates a blockage in the drainage path — this is typically caused by a clogged filter, a loose or misaligned drain pump cover, a kinked drain hose, or a blocked garbage disposal connection. Unlike E23 (pump failure), E24 indicates the pump is working but is obstructed. Water may be visible standing in the bottom of the dishwasher. ## Fault Details | Field | Value | |-------|-------| | Error Code | E24 | | Appliance | Bosch SHPM88Z75N 800 Series Plus Top Control Dishwasher | | Fault Type | Drainage blocked | | Severity | Medium | | User Serviceable | Yes — follow steps below | | Applicable Models | SHPM88Z75N, SHP78CM5N, SHPM65Z55N | ## Common Causes - Blocked drain filter — food debris preventing water from reaching the drain pump

  • Drain pump cover loose, improperly seated, or missing — allows air to enter pump and lose prime
  • Kinked or pinched drain hose behind or under the dishwasher
  • Garbage disposal knockout plug not removed — if recently installed, the drain plug may still block flow
  • Drain hose connected without a high loop, allowing water to siphon back
  • Blocked air gap (if installed) — the fitting on the countertop or sink that vents the drain hose ## Step-by-Step Troubleshooting | Step | Action | What To Do | Expected Result | |------|--------|------------|-----------------| | 1 | Clean the drain filter | Remove the filter assembly from the dishwasher sump and clean under running water with a soft brush. This is the most common cause of E24 and should always be the first step. See E22 steps for full filter cleaning instructions | Filter clean; standing water drains when pump runs | | 2 | Check and reseat the drain pump cover | With the filter removed, locate the flat drain pump cover at the bottom of the sump. Press firmly and rotate clockwise to ensure it is properly locked. A loose pump cover allows the pump to draw air instead of water | Pump cover clicks firmly into sealed position | | 3 | Inspect the drain hose for kinks | Pull the dishwasher out from under the counter 30–40 cm. Inspect the drain hose running from the dishwasher to the under-sink drain or garbage disposal. Straighten any kinks and verify the hose forms a high loop before descending to the drain connection | Drain hose straight with a proper high loop | | 4 | Check the garbage disposal connection | If your dishwasher drains into a garbage disposal, run the disposal for 30 seconds to clear any food debris from the disposal drain port. If the disposal was recently replaced, verify the knockout plug was removed from the dishwasher inlet port | Disposal clear; knockout plug removed if newly installed | | 5 | Check and clean the air gap | If you have an air gap fitting on your countertop or sink (a small chrome cap), remove it and check for clogging. Clean with a small brush or pipe cleaner. A blocked air gap creates back pressure preventing drainage | Air gap clear; E24 resolves after clearing air gap blockage | ## Frequently Asked Questions ### Why is there standing water in my Bosch dishwasher? Standing water in the dishwasher sump after a cycle almost always indicates E24 — a drain blockage. The most common cause is a clogged filter, followed by a kinked drain hose or blocked air gap. Clean the filter first — this resolves E24 in the majority of cases. ### What is a high loop and why does my drain hose need one? A high loop is a section of drain hose that runs up to counter height before descending to the drain connection. This loop acts as an air break that prevents dirty drain water from siphoning back into the clean dishwasher. Without a high loop, water from the sink drain can flow back into the dishwasher, causing odors and potential contamination. ### How do I remove the garbage disposal knockout plug? When a garbage disposal is newly installed, the dishwasher drain inlet on the disposal body has a plastic knockout plug that must be removed before connecting the dishwasher drain hose. Insert a flat screwdriver into the disposal inlet and tap with a mallet to punch the plug inward, then retrieve the plug from inside the disposal chamber before running the unit. ### Can E24 damage my dishwasher if left unaddressed? If the dishwasher repeatedly fails to drain, standing water in the sump can cause odor, mold growth, and increased strain on the drain pump motor. Repeated attempts to run a drain cycle against a severe blockage can eventually overheat and burn out the drain pump. Address E24 promptly to avoid secondary damage. --- Source: Bosch 800 Series Plus Top Control Dishwasher service documentation. Last Updated: March 2026 ### Is it safe to keep using my Bosch shpm88z75n with error e24? If error e24 does not indicate an immediate safety hazard such as a gas leak, electrical short, or water flooding, you can continue limited use while monitoring the appliance. However, running the dishwasher with an active error code increases the risk of further damage. Address the underlying issue as soon as possible. For high-severity errors, disconnect the appliance and contact a qualified technician. ### How much does it cost to fix error e24 on a Bosch shpm88z75n? Repair costs for error e24 on the Bosch shpm88z75n dishwasher depend on the root cause. DIY fixes such as cleaning filters, resetting the unit, or reconnecting loose wires cost nothing beyond basic tools. If a component replacement is needed, parts and labor from a certified technician are the main expenses. Contact a Bosch-authorized service provider for an accurate estimate based on your specific situation. ### What does error code e24 mean on a Bosch dishwasher? Error code e24 on Bosch dishwasher models indicates Drainage blocked — dishwasher cannot drain due to blocked filter, kinked hose, or pump cover issue. This error is detected by the appliance’s internal diagnostic system and displayed to alert the user that attention is needed. Refer to the troubleshooting steps above for guidance on resolving this issue. ### Is it safe to keep using my Bosch shpm88z75n with error e24? If error e24 does not indicate an immediate safety hazard such as a gas leak, electrical short, or water flooding, you can continue limited use while monitoring the appliance. However, running the dishwasher with an active error code increases the risk of further damage. Address the underlying issue as soon as possible. For high-severity errors, disconnect the appliance and contact a qualified technician. ### How much does it cost to fix error e24 on a Bosch shpm88z75n? Repair costs for error e24 on the Bosch shpm88z75n dishwasher depend on the root cause. DIY fixes such as cleaning filters, resetting the unit, or reconnecting loose wires cost nothing beyond basic tools. If a component replacement is needed, parts and labor from a certified technician are the main expenses. Contact a Bosch-authorized service provider for an accurate estimate based on your specific situation. ### What does error code e24 mean on a Bosch dishwasher? Error code e24 on Bosch dishwasher models indicates Drainage blocked — dishwasher cannot drain due to blocked filter, kinked hose, or pump cover issue. This error is detected by the appliance’s internal diagnostic system and displayed to alert the user that attention is needed. Refer to the troubleshooting steps above for guidance on resolving this issue.