Bosch washer — Error Code E18
The washer has failed to drain water within the allotted time.
What it means
The E18 error code on a Bosch washing machine is a critical drain fault. It is triggered when the main control board (PCB) signals the drain pump to evacuate water, but the analog pressure sensor fails to register an 'empty' state within the pre-programmed timeout window (typically 90 to 180 seconds). When this timeout is exceeded, the control halts the cycle, locks the door to prevent flooding, and flashes E18. This is primarily a flow restriction or mechanical pump failure, though in rare cases, a fouled pressure chamber or a blown triac on the motor control circuit can cause the exact same symptom.
Likely Causes
- 1 Clogged Pump Filter (Coin Trap)Lint, coins, bobby pins, or debris are physically blocking the drain pump impeller from spinning.
- 2 Faulty Drain Pump MotorAn open electrical winding or worn bearings causing the magnetic impeller to seize under load.
- 3 Blocked Drain Hose or StandpipeA kinked external drain hose or a plumbing restriction preventing outward water flow.
- 4 Obstructed Tub-to-Pump SumpSmall garments (like baby socks) bypassing the drum seal and blocking the eco-valve or sump hose.
- 5 Pressure Sensor/Chamber IssueA clogged air dome preventing the pressure switch from resetting to its baseline empty state.
How to clear / reset
To temporarily clear the E18 code, turn the selector dial to the 'Off' position to cut power to the control board. Wait 60 seconds, then select a 'Spin/Drain' cycle to attempt to force the pump to run. If the tub is full of water, you must manually drain it using the small auxiliary drain hose located next to the pump filter behind the bottom front access panel. The E18 code is a hard fault; it will immediately return on the next cycle if the physical blockage or pump failure is not resolved.
Common replacement parts
When to call a pro
Call a professional if clearing the pump filter and checking the drain hose does not resolve the E18 code. Diagnosing a failed drain pump requires a multimeter to check for 120VAC at the pump terminals and verifying the winding resistance (typically 150-200 ohms). If the pump tests good but receives no voltage, the main control board may require component-level diagnostics. Axis Appliance Repair offers a $90 diagnostic (waived upon authorized repair) and backs all Bosch washer repairs with a 1-year parts and labor warranty.
FAQs
How much does it cost to fix a Bosch E18 error?
If it is just a clogged filter, it is a $0 DIY fix. If the drain pump motor has failed and requires replacement, expect $180 to $300 including OEM parts and professional labor.
Can I fix the E18 code myself?
Yes, you can manually drain the tub and clean the coin trap filter located behind the bottom right panel. If the pump itself is dead, DIY replacement is possible but requires disassembling the front panel and working with electrical connections.
Will the E18 code clear itself?
No. The control board will lock out the cycle until the water is successfully evacuated and the pressure sensor registers an empty tub.
How long does it take a tech to fix this?
A professional appliance technician can usually clear a sump blockage or replace a Bosch drain pump in 45 to 60 minutes.
Will running the washer with an E18 code damage it?
You cannot run the washer while the code is active. Repeatedly forcing a stalled pump to run by resetting the machine can overheat the pump motor and potentially short out the main control board.
Need help with E18?
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