Bosch Dishwasher Error Code E21: How to Fix It

Q: What causes Bosch dishwasher error E21?

Error E21 is caused by a blocked wash pump, typically due to food particles, grease, or debris clogging the pump impeller. Poor pre-rinsing of dishes and overloading are common contributing factors.

Q: Can I run my Bosch dishwasher with E21 error?

No, you should not run the dishwasher when E21 appears. The blocked pump cannot circulate water properly, which can damage the motor and prevent effective cleaning and draining.

Q: How often should I clean my Bosch dishwasher filter?

Clean your dishwasher filter at least once a month, or more frequently if you notice poor cleaning performance or drainage issues. Regular maintenance prevents E21 errors from occurring.

Q: Is Bosch dishwasher E21 error expensive to fix?

Most E21 errors can be fixed with simple cleaning at no cost. If the pump motor needs replacement, repair costs typically range from $150-300 including labor, depending on your model and local service rates.

Abstract

The Bosch dishwasher error code E21 indicates that your wash pump is blocked and cannot circulate water properly. This typically happens when food particles, grease, or debris clog the pump impeller, preventing the dishwasher from draining and washing effectively.