Seeing the Bosch dishwasher E22 error code on your appliance can be frustrating, especially when you’re unsure what it means. This error code typically indicates a drainage issue, often caused by a clogged filter or blockage in the system. When the dishwasher is unable to drain properly, leftover water remains at the bottom of the dishwasher, preventing a clean wash cycle.
The E22 error code usually means that the dishwasher filter is blocked by food particles, debris, or grease buildup. Over time, these materials accumulate, restricting the flow of water and leading to drainage problems. If left unaddressed, this can affect the dishwasher’s performance and increase the risk of further damage.
In this guide, I’ll explain what causes the E22 error code, how to clean the filter, and the steps to fix the problem quickly.
What Are the Causes of Bosch Dishwasher E22 Error Code?
The Bosch dishwasher E22 error code signals a drainage problem, usually caused by blockages that prevent proper water flow. Identifying the cause of the issue is the first step in effectively resolving it.
| Cause | Description |
|---|---|
| Clogged Filter | Accumulation of food particles, grease, and debris restricting drainage. |
| Blocked Drain Hose | Clogged or kinked hose impeding water flow. |
| Drain Pump Issues | Malfunctioning or blocked pump unable to drain water effectively. |
| Calcium Buildup | Mineral deposits from hard water blocking water flow. |
| Faulty Components | Damaged check valve or impeller affecting drainage |
Clogged Filter
A blocked filter is one of the most common reasons for the E22 error code. Over time, food particles, grease, and debris accumulate in the dishwasher filter, restricting drainage. When the filter is blocked, water in the dishwasher cannot drain efficiently, leading to standing water at the bottom. To prevent this, it’s important to clean the filter regularly and check for any blockages.
Blocked Drain Hose
The drain hose carries wastewater out of the dishwasher, but if it becomes clogged or kinked, it can cause the E22 error. A blockage inside the drain hose, often from food debris or grease, can slow or stop water flow. Disconnect the hose and inspect it for any obstructions, ensuring it is properly positioned without sharp bends.
Drain Pump Issues
A malfunctioning drain pump can also be responsible for the E22 error code. If the pump is blocked by food debris or worn out from extended use, it may be unable to drain water effectively. Locate the drain pump and check for any visible blockage or signs of damage. If the pump is still not working after cleaning, it may require a repair or replacement.
Calcium Buildup
If your dishwasher model is used in an area with hard water, calcium deposits can develop in the filter, drain hose, and pump. This buildup can block water flow, making drainage less efficient and triggering the E22 error code. Descaling the dishwasher with a suitable cleaner can help remove mineral deposits and keep the system functioning properly.
Additional Considerations
Other possible causes include a faulty check valve or impeller that affects drainage. These components help control water flow, and if they become damaged, water may not exit the dishwasher as intended. If basic troubleshooting doesn’t resolve the issue, it may be best to consult an expert for further inspection and repair.
How Do You Fix the Error Code E22 on Your Bosch Dishwasher?
To fix the error and restore normal operation, follow these troubleshooting steps.
Clean the Filter
A clogged filter is a common cause of the E22 error code. Cleaning it can help restore proper water flow.
- Locate the Filter: The dishwasher filter is located at the bottom, beneath the lower spray arm.
- Remove the Filter: Depending on your dishwasher model, twist or pull the filter out carefully.
- Clean the Filter: Rinse it thoroughly under warm water and use a soft brush with mild detergent to remove debris and food particles.
- Reinstall the Filter: Place the clean filter back securely to prevent blockages from forming again.
Check the Drain Hose
A blocked drain hose can prevent water from flowing out of the appliance, triggering the E22 error code.
- Inspect for Blockages: Look for kinks, bends, or clogs in the drain hose that may be responsible for the issue.
- Flush the Hose: Disconnect it and run high-pressure water through it to remove debris or grease buildup.
- Reattach Securely: Make sure the drain hose is properly connected and positioned without sharp bends that could restrict drainage.
Inspect the Drain Pump
A faulty drain pump can lead to an E22 error, as it is responsible for removing wastewater from the dishwasher.
- Turn Off Power and Water Supply: Disconnect the dishwasher from power and shut off the water supply to prevent accidents.
- Access the Drain Pump: Locate the drain pump at the bottom of the dishwasher and remove any connected hoses.
- Clear Obstructions: Check for food debris, broken glass, or foreign objects inside the pump, and carefully remove them using needle-nose pliers.
- Test Movement: Spin the pump impeller manually to ensure it moves freely before reassembling everything.
Reset the Dishwasher
After performing the necessary repairs, resetting the dishwasher can help clear the E22 error code.
- Run a Quick Cycle: Once the filter, drain hose, and pump are clean, reconnect power and run a short cycle to check if the error disappears.
- Power Cycle the Dishwasher: If the error persists, turn off the dishwasher at the breaker for a few minutes before turning it back on.
When Issues Persist
If the E22 error remains after performing these steps, check for blockages in your home’s drainage system or garbage disposal. A backed-up sink can prevent the dishwasher from draining properly.
If troubleshooting does not resolve the issue, it may be time to consult an expert for further inspection and repair.
What Are the Preventive Tips to Avoid the E22 Error in the Future?
To prevent the Bosch dishwasher E22 error code, regular maintenance and proper usage are necessary. Implementing these preventive measures can help keep the appliance functioning efficiently and avoid drainage issues.
Regularly Clean the Filter
The dishwasher filter should be cleaned every 3 to 6 months to prevent blockage and maintain proper water flow.
Scrape Dishes Before Loading
Large food scraps and debris can quickly clog the dishwasher filter, leading to drainage problems.
- Remove Food Particles: Scrape off excess food from dishes before placing them in the dishwasher.
- Avoid Hard Residue: Items with dried-on food should be rinsed lightly to prevent clogs in the pump and filter.
Inspect and Maintain the Drain Hose
A clogged drain hose can restrict water drainage, contributing to the E22 error code.
- Check for Kinks: Make sure the drain hose is not bent or compressed, which can obstruct drainage.
- Flush the Hose: Disconnect it periodically and run water through it to clear any blockage caused by grease or food debris.
- Install a High Loop: Ensure the drain hose is positioned correctly to prevent water from flowing back into the dishwasher.
Clean the Spray Arms
Blocked spray arms can reduce the effectiveness of the wash cycle, leaving food particles and detergent residue behind.
- Remove the Spray Arms: Detach them according to the dishwasher manual.
- Clear the Holes: Use a toothpick or small brush to remove debris from the spray nozzles.
- Wash and Reinstall: Rinse under warm water, dry, and securely place them back in the dishwasher.
Run a Cleaning Cycle Monthly
Using a dishwasher cleaner or descaler helps remove calcium buildup, grease, and detergent residue.
- Use a Commercial Cleaner: Run an empty cycle with a dishwasher cleaning solution to thoroughly clean internal components.
- Prevent Hard Water Buildup: If your area has hard water, consider adding a descaler or softening salt to minimize calcium deposits.
Check the Drain Pump Area
The drain pump should be inspected occasionally for blockage or damage.
- Remove Debris: Use tweezers or a small brush to clean out any food debris or foreign objects.
- Test the Pump: Ensure the pump impeller moves freely without obstruction.
Conclusion
The Bosch dishwasher E22 error code is typically caused by clogged filters, blocked drain hoses, or drain pump issues. When water cannot drain properly, it leads to standing water in the dishwasher, affecting cleaning performance. Fortunately, most of these problems can be resolved by cleaning the filter, inspecting the drain hose, and removing obstructions from the drain pump.
Preventing the E22 error requires regular maintenance. Cleaning the filter every few months, checking for blockages in the drain hose, and keeping the spray arms clear can help ensure efficient operation. Running a monthly cleaning cycle with a descaler also helps prevent mineral buildup, especially in areas with hard water.
If the error persists despite troubleshooting, there may be an issue with internal components or the household plumbing system. In such cases, professional inspection may be necessary to restore proper functionality.
FAQs
How Often Should I Clean the Bosch Dishwasher Filter?
Cleaning the Bosch dishwasher filter every 3 to 6 months helps prevent food debris buildup and drainage issues. In areas with hard water or frequent dishwasher use, monthly cleaning may be necessary to maintain optimal performance and prevent the E22 error code from appearing.
Can I Fix the E22 Error Myself, or Do I Need a Professional?
Most E22 error codes can be resolved by cleaning the filter, checking the drain hose, and inspecting the drain pump for blockages. If the issue persists despite troubleshooting, it may indicate a faulty pump, control board, or wiring problem, requiring professional repair.
What If Cleaning the Filter Doesn’t Resolve the E22 Error?
If the E22 error remains after cleaning the filter, check the drain hose for clogs or kinks and inspect the drain pump for obstructions. If these steps do not work, the issue could be related to a control board malfunction or internal wiring, requiring expert diagnosis.
How Can I Prevent Calcium Buildup in My Bosch Dishwasher?
To prevent calcium buildup, use a dishwasher cleaner or descaler once a month. If you have hard water, consider using a water softener or adding dishwasher salt to reduce mineral deposits that can clog filters and affect the dishwasher’s drainage system.
