Bosch E18 Error: Drain Pump Timeout
How to fix Bosch washer error code E18 (drain pump blocked or timeout).
Drain pump blocked or maximum drain time exceeded. Tub remains full of water and wash cycle halts.
Probable Causes
Foreign object (coin, hair clip, small sock) jamming drain pump impeller.
Coin trap filter choked with lint and detergent residue.
Kinked rear discharge hose or clogged wall standpipe.
Diagnostic & Testing Steps
- •Washer halts full of water before rinse or final spin phase.
- •Continuous audible alert with E18 or F18 flashing on display.
- •Door lock remains engaged to prevent household flooding.
Tools & Equipment Required
- ✓Torx T20 & Slotted ScrewdriversOpen front lower service flap and remove pump debris filter cap.
- ✓Heavy-Duty Absorbent Towels & Shallow PanCatch 2-3 liters of dirty standing water when loosening drain filter.
- ✓Needle-Nose PliersExtract coins, hairpins, and lint ropes jammed inside the impeller chamber.
- ✓Inspection FlashlightVisually confirm free rotation of pump impeller blades.
Fast Reset Sequence: Bosch Control Board Hard Power Cycle
Before unmounting panels or beginning diagnostic procedures, attempt this manufacturer reset to clear transient microcomputer lockouts:
- 1.Turn cycle selector dial to the 12 o'clock (OFF) position.
- 2.Unplug wall power cord or trip the dedicated circuit breaker for 3 full minutes.
- 3.Restore electrical power, select a drain/spin test cycle, and monitor pump startup.
- 1
Step 1: Drain Water via Front Emergency Hose
[ ] DonePlace towels and shallow tray below lower right door, uncork emergency drain hose to empty tub.
Verification:Tub is completely drained and water ceases flowing from small hose. - 2
Step 2: Clean Coin Trap Filter & Free Impeller
[ ] DoneTurn filter cap 1/4-turn counter-clockwise, remove trapped coins/pins, and spin impeller with finger.
Verification:Impeller spins freely with distinct magnetic indexed resistance and no binding. - 3
Step 3: Verify Drain Hose and Run Drain/Spin Cycle
[ ] DoneRe-tighten filter cap, verify discharge hose is unkinked, plug in washer, and run Drain/Spin cycle.
Verification:Pump evacuates water swiftly without grinding noise and door unlocks at cycle end.
Repair Solutions
Open lower service door and drain water through emergency hose into a shallow tray.
Unscrew drain filter cap counter-clockwise, clear debris, and check impeller rotation.
Check drain hose routing and test short drain/spin cycle.
Frequently Asked Questions
How do I manually unlock a Bosch washer door stuck on E18?
After draining water through the emergency hose, pull down firmly on the black plastic emergency release latch inside the filter compartment.
When does an E18 error require pump replacement?
If the filter and hose are clean but the pump hums, binds, or shows open windings (< 15 Ω or > 30 Ω), replace the pump assembly.