Bosch dishwasher — Error Code E22
Residual water detected in the sump, usually due to a clogged filter.
What it means
The E22 error code on a Bosch dishwasher indicates that the main control board has detected residual water remaining in the sump basin at the end of a wash cycle. Unlike an E24 code (which points to a hard drain failure), E22 specifically flags that the dishwasher is struggling to clear the last bit of water. Bosch dishwashers monitor water levels and pump motor resistance. If the drain pump runs but the system senses water is still present, it triggers E22. Most frequently, this is a flow restriction issue rather than an electrical failure. A heavily soiled micro-filter restricts the flow of water to the drain pump impeller, leaving standing water. Secondary triggers include a partial blockage in the drain hose, an obstructed drain pump impeller, or a failing BLDC drain pump that lacks the torque to push water out efficiently.
Likely Causes
- 1 Clogged Micro-FilterThe fine mesh filter in the sump is blocked by food debris, paper labels, or grease, preventing water from reaching the drain pump.
- 2 Obstructed Drain Pump ImpellerDebris like fruit seeds, glass shards, or plastic wrappers bypass the filter and jam the drain pump impeller, reducing its pumping capacity.
- 3 Blocked Drain Hose or Air GapA partial clog in the corrugated drain hose, the sink air gap, or the garbage disposal knockout restricts water flow, leaving residual water in the tub.
- 4 Failing Drain PumpThe BLDC drain pump motor is wearing out, causing it to lose torque and fail to evacuate water completely before the control board times out the drain phase.
How to clear / reset
To clear the E22 code, you must address the drainage restriction. Start by pressing and holding the Start button for 3 to 5 seconds to force a manual drain and reset the control board. If the code persists, disconnect power to the dishwasher. Remove the bottom rack, unscrew the cylindrical micro-filter, and wash it thoroughly under warm soapy water. Next, remove the plastic pump cover in the sump (using a spoon to pry it up) and inspect the white pump impeller. Remove any debris, ensure the impeller spins freely with slight magnetic resistance, and reassemble. Restore power and run a short cycle.
Common replacement parts
When to call a pro
Call a professional if you have cleaned the filter and checked the pump impeller, but the E22 code keeps returning. Diagnosing a failing drain pump requires a multimeter to check for proper resistance and verifying that the main control board is sending the correct voltage to the pump. Pulling the dishwasher to replace a drain hose or pump can also be cumbersome and risks damaging the water supply line. Axis Appliance Repair offers a $90 diagnostic (waived if you proceed with the repair) and backs all Bosch dishwasher repairs with a 1-year parts and labor warranty.
FAQs
How much does it cost to fix a Bosch E22 error?
If it is just a clogged filter, it is free to clean yourself. If the drain pump needs replacement, expect professional repairs to range from $150 to $280 including parts and labor.
Can I fix the E22 code myself?
Yes, in about 80% of cases, cleaning the primary micro-filter and removing debris from the drain pump impeller will resolve the E22 error without needing tools.
Will the E22 code clear itself?
No. The code will remain in the system until the standing water is cleared and the control board is reset by holding the Start button for 3 to 5 seconds.
How long does it take to repair?
Cleaning the filter takes 5 minutes. If a technician needs to replace the drain pump or clear a deep hose clog, the repair typically takes 45 to 60 minutes.
Is it safe to keep running the dishwasher with an E22 code?
No. Ignoring drainage issues can lead to foul odors, poor wash performance, and eventually a complete drain failure (E24 code) or water leaking onto your floor.
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