Standing water after the cycle
A pool of dirty water is left under the lower rack, often around or above the filter area.
Start here: Start with the filter, sump opening, and the first section of the dishwasher drain hose.
Dishwasher not draining
Bosch Dishwasher E22 Code
Direct answer: A Bosch dishwasher E22 code usually means the machine is seeing poor drainage around the filter and sump area. Most of the time the fix is a packed filter, debris under the filter, a kinked dishwasher drain hose, or a blockage at the sink air gap or sink drain connection.
Most likely: Start by checking for standing water in the bottom, then remove and clean the dishwasher filter and look for glass, labels, grease sludge, or food packed in the sump opening.
If the tub has dirty water sitting in the bottom and the code comes back after a cancel or drain attempt, stay on the drain path first. Reality check: this code is commonly caused by plain old gunk, not a dramatic part failure. Common wrong move: running cleaner through the machine before pulling the filter and checking for debris underneath it.
Don’t start with: Do not start by buying a dishwasher drain pump or control part. E22 is far more often a blockage or dirty filter-area problem than an electrical failure.
If you see water in the sumpclean the filter area and check the drain path before replacing anything.
If the dishwasher hums but will not clear waterlook for a jammed impeller area or a blocked dishwasher drain hose.
Last reviewed: 2026-04-17
What E22 usually looks like in the kitchen
Code appears with little or no water visible
The machine shows E22 but the tub only looks damp or has a thin layer of water under the filter cover.
Start here: Pull the filter anyway and check underneath for grease paste, broken glass, labels, or seeds packed in the sump.
Drain pump hum or buzz
You hear a low hum during drain but the water level barely changes.
Start here: Check for debris jamming the drain pump area before assuming the pump itself is bad.
Backs up when the sink drains
The dishwasher seems worse when the sink is used, or water burps up near the air gap.
Start here: Inspect the sink air gap and the drain hose connection at the sink or disposal side first.
Most likely causes
1. Clogged dishwasher filter or debris packed under it
This is the most common E22 trigger. Grease, paper labels, bone chips, glass, and food sludge collect where the dishwasher senses poor drainage.
Quick check: Remove the lower rack and filter, then look for standing water and packed debris in the sump well.
2. Blocked sink air gap or restriction where the dishwasher drain hose ties into the sink drain
If water cannot leave the hose freely, the dishwasher finishes with water still in the base and throws a drain-related code.
Quick check: If your sink has an air gap, pop the cap and check for sludge. Also inspect the hose connection under the sink for buildup.
3. Kinked or partially clogged dishwasher drain hose
A hose can look fine from the front but be pinched behind the machine or lined with grease inside, slowing drain flow enough to trigger E22.
Quick check: Follow the dishwasher drain hose as far as you can under the sink and look for sharp bends, sags, or a greasy blockage.
4. Dishwasher drain pump jammed or weak
Less common than a blockage, but possible if the filter area is clean, the hose path is open, and the machine only hums or drains very weakly.
Quick check: After cleaning the sump area, run a drain cycle and listen for a strong water rush versus a weak hum or intermittent clicking.
Step-by-step fix
Step 1: Confirm it is really a drain problem
E22 points you toward drainage, but you want to separate actual standing water from a false alarm caused by debris around the filter area.
- Open the dishwasher and pull out the lower rack.
- Look at the bottom of the tub for standing water, greasy sludge, or bits of food around the filter.
- Cancel the cycle or start a drain function if your machine allows it, then listen for what happens.
- Note whether you hear a strong drain sound with water moving, a weak hum, or almost nothing at all.
Next move: If the dishwasher drains fully and the code does not return after a fresh rinse, the issue may have been temporary debris around the filter area. If water stays in the bottom or the code returns quickly, move to the filter and sump cleanup next.
What to conclude: Visible water or a weak drain sound usually means a blockage or jam is still in the drain path.
Stop if:
- Water is spilling onto the floor.
- You smell burning or the machine makes a harsh grinding noise.
- The dishwasher trips a breaker or loses power during the drain attempt.
Step 2: Clean the dishwasher filter and sump area thoroughly
This is the highest-payoff fix for E22 and the least invasive place to start.
- Turn off power to the dishwasher at the breaker or unplug it if the plug is accessible.
- Remove the dishwasher filter assembly and rinse it with warm water.
- Use mild soap and your fingers or a soft brush to clear grease and trapped debris from the filter mesh and frame.
- Look down into the sump area under the filter and remove food scraps, paper, labels, toothpicks, or glass carefully.
- Wipe the area clean and make sure water can move freely into the drain opening.
Next move: If the dishwasher drains normally after reassembly, the E22 code was caused by a blocked filter area. If the filter area is clean and the machine still leaves water, check the external drain path under the sink.
What to conclude: A dirty filter or packed sump is the most likely cause. If cleaning changes the sound or improves drain speed, you were on the right track.
Step 3: Check the sink-side drain path
A dishwasher can have a clean filter and still show E22 if the water cannot get through the air gap, sink tailpiece, or disposal connection.
- Under the sink, inspect the dishwasher drain hose for kinks, crushing, or a low sag full of sludge.
- If your sink has an air gap, remove the cap and clean out any buildup inside.
- Check the hose connection where the dishwasher drains into the sink plumbing and clear grease or food blockage there.
- If the dishwasher connects to a garbage disposal, make sure that inlet is not clogged.
- Reattach everything securely and keep the hose routed upward in a high loop if that is how your setup is arranged.
Next move: If the dishwasher now drains with a strong rush of water, the restriction was outside the machine. If the sink-side path is clear and the dishwasher still hums or drains weakly, the problem is likely at the pump area or inside the dishwasher drain hose.
Step 4: Listen for a jammed pump versus a clear but weak drain
Once the easy blockages are ruled out, the sound of the drain attempt helps narrow the next move.
- Restore power and run a short rinse or cancel-drain cycle.
- Listen near the lower front of the dishwasher during the drain portion.
- A steady strong whoosh usually means the pump is moving water and the restriction is farther downstream.
- A low hum with little water movement points to a jammed or failing dishwasher drain pump, or a badly restricted dishwasher drain hose.
- If accessible and safe on your model, recheck the sump area for anything touching the impeller zone.
Next move: If the drain sound becomes strong and the tub clears, recheck for leftover debris and run another rinse cycle to confirm. If the machine repeatedly hums, clicks, or leaves water after the drain path has been cleared, a pump problem becomes much more likely.
Step 5: Replace the failed drain-path part or call for service
After the filter, sump, and sink-side checks, the remaining fixes are usually a damaged dishwasher drain hose or a bad dishwasher drain pump.
- Replace the dishwasher drain hose if it is kinked, split, grease-packed inside, or will not clear even after removal and flushing.
- Consider a new dishwasher filter assembly only if the existing filter is torn, warped, or will not lock in place after cleaning.
- If the drain path is clear and the machine still only hums or drains weakly, plan on a dishwasher drain pump repair.
- If you are not comfortable pulling the dishwasher out, disconnecting hoses, or checking internal components, book an appliance service call and describe the E22 code plus the checks you already completed.
A good result: If the dishwasher finishes a full rinse and drains completely with no returning code, the repair path was correct.
If not: If a clear drain path and a known-good pump still do not solve it, the machine needs deeper diagnosis for wiring or control issues.
What to conclude: You have ruled out the common blockage causes. The next action is a targeted part repair or a clean service handoff, not more guesswork.
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FAQ
What does E22 mean on a Bosch dishwasher?
It usually means the dishwasher is not draining cleanly around the filter and sump area. In real kitchens, that most often comes down to a dirty filter, debris under the filter, or a blocked drain path under the sink.
Can I clear a Bosch E22 code just by resetting the dishwasher?
Sometimes the code will clear briefly, but it usually comes back if water still cannot drain properly. A reset is not a real fix when the filter area or drain path is still restricted.
Why do I get E22 even when I do not see much water?
A thin layer of dirty water or sludge under the filter can be enough to trigger it. Grease paste, labels, seeds, and small debris can hide below the filter even when the tub does not look badly flooded.
Is E22 usually a bad drain pump?
No. A bad dishwasher drain pump is possible, but it is not the first bet. Most E22 calls end up being a clogged filter area, blocked air gap, or restricted dishwasher drain hose.
Can a clogged sink drain cause a Bosch dishwasher E22 code?
Yes. If the dishwasher drains into a blocked sink-side connection or air gap, water cannot leave fast enough and the dishwasher may finish with water still in the base.
Should I run dishwasher cleaner to fix E22?
Not first. Cleaner will not remove a label, seed, glass shard, or packed sludge under the filter. Pull the filter and inspect the drain path before using any cleaning product.