Drain hose kinked or blocked — water not exiting dishwasher correctly
The E24 error on the Bosch SHPM88Z75N indicates drain hose kinked or blocked — water not exiting dishwasher correctly. This typically occurs due to drain hose kinked under the sink cabinet restricting water flow. Most homeowners fix this in 20–30 min by following the steps below.
Common Causes of E24
- 1Drain hose kinked under the sink cabinet restricting water flow
- 2Drain hose connection at the garbage disposal or drain pipe clogged
- 3Air gap device on the countertop clogged with debris
- 4Drain hose too long with an improper high loop causing siphon issues
How to Fix E24
- 1
Step 1
Power off the dishwasher and disconnect it
- 2
Step 2
Open the cabinet under the sink and trace the dishwasher drain hose from the dishwasher to the connection point
- 3
Step 3
Check the entire hose length for kinks or tight bends — gently straighten any found
- 4
Step 4
Disconnect the drain hose from the garbage disposal or sink drain and confirm it is clear by running water through it
- 5
Step 5
If an air gap device is installed on the countertop, unscrew its cap and clean out any debris blockage
- 6
Step 6
Reconnect all hoses securely, restore power, and run a test cycle to confirm drainage
Tools Needed
When to Call a Technician
Drain hose is clear but E24 persists — the drain pump or control board drain relay needs professional testing
Frequently Asked Questions
Common questions about Bosch E24 error
E24 almost always comes down to the drain hose. Open the cabinet under the sink and trace the hose from the dishwasher to where it connects. Look for three things: a kinked hose, a blocked garbage disposal connection, or a clogged air gap device. Straightening the hose and clearing blockages fixes E24 in most cases without needing a technician.
Yes — the drain hose should be routed with a high loop up to the top of the cabinet under the sink before descending to the drain connection. This high loop prevents drain water from siphoning back into the dishwasher between cycles. An improperly routed hose without a high loop can cause recurring drain issues and E24 errors.
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