Bosch Washer E18 — What It Means & How to Fix It
Also shown as F18 on some models.
Bosch's E18 — the F18 display on some models — means the washer couldn't drain within the expected time, most often because the pump filter is clogged with lint and coins or the drain hose is kinked or pushed too far down the standpipe.
What this code means
The machine watches how fast the water level drops while draining and flags E18 when it stalls. The usual culprit is the drain pump filter behind the flap at the front kickplate, which traps lint, hair, coins and buttons until flow chokes off; a kinked hose or a blocked household standpipe does the same from further downstream.
E18 and F18 are the same drain fault across Bosch's washer range. Bosch's own steps warn that any water released during the fix can be scalding hot if a warm cycle was interrupted — a cool-down and a towel are worth the wait.
Most likely causes
| Cause | How likely | DIY-fixable? |
|---|---|---|
| Drain pump filter clogged with lint, coins or debris | Very common | Yes — 20 min |
| Drain hose kinked, pinched, or pushed too far into the standpipe | Common | Yes — no tools |
| Blocked household standpipe or sink trap the hose drains into | Occasional | Partly — inspect only |
| Drain pump impeller jammed by a foreign object | Occasional | Yes — inspect impeller |
| Failed drain pump motor | Less common | No — technician job |
What you can try yourself
- Set the program to off, unplug the machine, and close the tap. If the wash was warm or hot, wait for the water to cool — it can scald.
- Open the small service flap behind the front kickplate and have a shallow tray and towels ready; there will be standing water.
- If your model has a black drain-down hose beside the filter, use it to empty the water first, then slowly unscrew the round pump-filter cap.
- Clear the filter chamber of lint, coins and hair, check that the impeller behind it turns freely by hand, then screw the cap back in fully with its handle vertical.
- Straighten the drain hose behind the machine and make sure it isn't shoved more than a few inches into the standpipe, then restore power and run a rinse-and-spin to confirm it drains.
When to call a technician
- The filter and hose are clear but E18 comes straight back and no water pumps out.
- The pump runs constantly or grinds without moving water, a sign it has seized or failed.
- Water backs up out of the standpipe when the machine drains, pointing to a household plumbing blockage.
Typical professional repair cost: Cleaning the filter is free; a new drain pump fitted professionally usually runs $150–$300.
Frequently asked questions
Where is the drain pump filter on a Bosch washer?
Behind a small flap on the lower front of the machine, usually in a bottom corner behind the kickplate. Unplug first, have towels ready for the water, then twist the round cap counter-clockwise to reach the filter.
Why is there hot water when I open the Bosch E18 filter?
If the fault interrupted a warm or hot wash, the trapped water is still at cycle temperature. Bosch specifically warns of scald risk here, so let the machine sit until it cools and open the filter slowly over a tray.
Is E18 the same as F18 on a Bosch washer?
Yes — they are the same drain-timeout fault shown on different Bosch displays. Both mean the water didn't leave fast enough, so both start at the pump filter and the drain hose.
Related Bosch codes
- Bosch Washer E17 Bosch's E17 — shown as F17 or F29 on some models — means the washer couldn't draw water quickly enough to fill, almost always because the inlet-hose filter screen is clogged, the tap isn't fully open, or household water pressure is low.
- Bosch Washer E23 Bosch's E23 — F23 on some displays — means the washer's AquaStop leak protection detected water in the base tray and cut the machine off to stop a flood, sometimes from a genuine leak but often from overfoaming, a hose weep, or a spill during a move.
- Bosch Washer E16 Bosch's E16 — displayed as E34, F16 or F34 on some models — means the door isn't locking, so the machine refuses to start, most often because a bit of laundry is caught in the seal or the door wasn't pushed until it clicked.
- Bosch Washer E32 Bosch's E32 — F32 on some models — means the drum couldn't balance the load for the spin, so the machine slows or skips the high-speed spin to protect itself, usually because of a single bulky item or a tangled clump on one side.
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