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Appliance Error Codes

Bosch SHPM65Z55N E23 Error Code | E23 Drain Pump Fault

Error e23 on Bosch shpm65z55n: Drain pump fault — drain pump is not operating or not pumping water out effectiv. Follow the troubleshooting steps below to diagnose and fix this dishwasher issue. ## What Does E23 Mean on a Bosch SHPM65Z55N? Your Bosch dishwasher is displaying an E23 error code, indicating a fault with the drain pump. The drain pump is responsible for removing wash water from the dishwasher at the end of each wash and rinse phase. E23 appears when the pump motor is not running, is running but not moving water, or when the control board detects an electrical fault in the pump circuit. Unlike E24/E25 (which are blockage issues), E23 typically indicates a mechanical or electrical pump failure. ## Fault Details | Field | Value | |-------|-------| | Error Code | E23 | | Appliance | Bosch SHPM65Z55N 500 Series Front Control Dishwasher | | Fault Type | Drain pump fault | | Severity | Medium | | User Serviceable | No — professional service recommended | | Applicable Models | SHPM88Z75N, SHP78CM5N, SHPM65Z55N | ## Common Causes - Drain pump motor winding failure — motor not running due to open circuit

  • Pump impeller jammed by debris that passed through the filter (broken glass, fruit seeds, plastic pieces)
  • Drain pump capacitor failure — pump motor not starting
  • Wiring harness to the drain pump damaged or connector loose
  • Control board drain pump relay or driver circuit failed
  • Water temperature too low causing the control board to lock out the pump (less common) ## Step-by-Step Troubleshooting | Step | Action | What To Do | Expected Result | |------|--------|------------|-----------------| | 1 | Check and clean the filter first | Before concluding a pump fault, clean the dishwasher filter thoroughly (see E22 steps). A severely blocked filter can cause drain pump overload symptoms. If E23 appeared suddenly after ignoring E22, clean the filter first and run a test drain cycle | E23 clears after filter cleaning — filter blockage was overloading the pump | | 2 | Check the drain pump for debris | With the dishwasher unplugged and water removed, locate the drain pump cover at the bottom left of the dishwasher sump. Remove the pump cover (quarter-turn counterclockwise on most Bosch models). Inspect the pump impeller cavity for debris — glass shards, pits, labels, or food husks can jam the impeller | No debris found; impeller spins freely by hand | | 3 | Listen for pump operation | During a drain cycle (restore power and start any cycle), listen closely — you should hear the drain pump running. A completely silent drain pump during the drain phase suggests motor failure. A humming pump that does not drain suggests a jammed impeller | Pump is audible but draining — E23 may be intermittent; jammed impeller likely | | 4 | Inspect the drain hose | Check that the drain hose (connected from the dishwasher to the under-sink plumbing) has not collapsed or kinked. The drain hose should form a high loop under the counter to prevent back-siphoning | Drain hose clear, no kinks, and forms a proper high loop | | 5 | Contact Bosch service for drain pump replacement | If the pump motor is confirmed faulty (silent operation, open circuit winding resistance, or failed impeller), the drain pump assembly must be replaced. Contact Bosch customer service at 1-800-944-2904 or a certified Bosch service partner | E23 resolved after drain pump replacement | ## Frequently Asked Questions ### Is E23 the same as E24 or E25? No. E22 and E23 are pump-related but distinct faults. E22 is a filter blockage. E23 is a drain pump motor or electrical fault — the pump itself has failed. E24 and E25 are drainage blockage faults — the pump is working but cannot push water past a blocked drain filter or pump cover. ### Can I clear a jammed drain pump impeller myself? Yes, accessing the drain pump impeller is a user-serviceable task on most Bosch models. With the dishwasher unplugged, remove the bottom rack and filter. Look for the pump cover in the sump area — rotate counterclockwise to open. Remove debris from the impeller cavity and try rotating the impeller to confirm it spins freely. ### How long does a drain pump last in a Bosch dishwasher? Bosch drain pumps typically last 8–12 years with normal use. Using the correct Bosch dishwasher tablets and rinse aid, regularly cleaning the filter, and avoiding loading items that can break (like thin-stemmed glasses at the base of the basket) all extend pump life. ### How much does a Bosch drain pump replacement cost? Bosch drain pump replacement parts typically cost . With professional labor, total repair cost is typically . Bosch 800 Series models may have higher parts costs. For dishwashers older than 8 years, compare repair cost against replacement value. --- Source: Bosch 500 Series Front Control Dishwasher service documentation. Last Updated: March 2026 ### Is it safe to keep using my Bosch shpm65z55n with error e23? If error e23 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 e23 on a Bosch shpm65z55n? Repair costs for error e23 on the Bosch shpm65z55n 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 e23 mean on a Bosch dishwasher? Error code e23 on Bosch dishwasher models indicates Drain pump fault — drain pump is not operating or not pumping water out effectively. 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 shpm65z55n with error e23? If error e23 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 e23 on a Bosch shpm65z55n? Repair costs for error e23 on the Bosch shpm65z55n 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 e23 mean on a Bosch dishwasher? Error code e23 on Bosch dishwasher models indicates Drain pump fault — drain pump is not operating or not pumping water out effectively. 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.