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Error code reference

GE Washer Dryer Error Code 18

Drain pump clearing algorithm failed

GE codesGE washer dryer codes

Drain pump clearing algorithm failed - while draining, the pressure sensor value for water level did not indicate the washer was empty before the max continuous drain ON time was reached.

First step from the service manual

Check the drain pump for blockage.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What 18 means on a GE washer dryer

Error code 18 on a GE washer indicates that the drain pump clearing algorithm has failed. During a drain cycle, the control board runs the drain pump continuously and monitors the pressure sensor to confirm the tub reaches an empty state. If the pressure sensor does not register an empty water level before the maximum allowable continuous drain run time is exceeded, the control board throws error code 18 and halts the cycle. This is a timed, sensor-verified process, meaning both the pump operation and the pressure sensor feedback must work correctly for the cycle to complete successfully.

The most direct cause is a physical blockage in the drain pump, the pump filter, or the drain hose. Debris such as coins, lint, small clothing items, or sediment buildup can restrict water flow enough that the pump cannot evacuate the tub within the allotted time. Beyond blockages, a failing drain pump motor that runs but produces insufficient flow can produce the same result. The pressure sensor itself is also a potential culprit: if the pressure switch or its connecting air tube is faulty or kinked, it may not accurately report water level to the control board even after the tub has drained.

Diagnosis should begin with a physical inspection of the drain pump and filter for obstructions, followed by checking the drain hose for kinks or clogs at the standpipe connection. If the pump and hose are clear, testing the pressure sensor and its air tube for continuity and physical integrity is the next step. A pump that hums but does not move water, or moves it very slowly, likely has a failing impeller or motor winding and will need replacement.

Source: manufacturer service documentation.

Common causes of 18

  1. 01

    Drain pump blockage

    Wiring / connection

    Foreign objects such as coins, lint, or small garments lodged in the pump or pump filter restrict water flow and prevent the tub from emptying in time. Inspect and clean the pump filter as the first step.

  2. 02

    Kinked or clogged drain hose

    Wiring / connection

    A drain hose that is kinked, pinched, or partially blocked at the standpipe connection slows drainage enough to trigger the timeout. Check the full length of the hose and confirm the standpipe is not blocked.

  3. 03

    Failing drain pump motor

    Part replacement

    A pump motor with a worn impeller or degraded windings may run but produce insufficient water flow to empty the tub within the allowed time. If the pump hums but drains slowly or not at all, replacement is likely needed.

  4. 04

    Faulty pressure sensor or air tube

    Part replacement

    If the pressure switch or its connecting air tube is cracked, kinked, or defective, it may not signal to the control board that the tub has emptied, even when drainage is working correctly. Inspect the air tube for damage and test the pressure switch for proper function.

  5. 05

    Standpipe height or drain configuration issue

    Wiring / connection

    If the drain hose is inserted too far into a standpipe or the standpipe is too tall, a siphoning or back-pressure condition can slow effective drainage. Confirm the drain hose installation meets the height and insertion depth requirements for the unit.

See the test procedure for each cause

Frequently asked questions about 18

What does 18 mean on a GE washer, dryer?
Error code 18 means the drain pump clearing algorithm failed. The washer ran the drain pump for the maximum allowed continuous time but the pressure sensor never confirmed the tub was empty. This points to a drainage problem, most often a blocked pump, clogged filter, or restricted drain hose.
How do I fix error code 18 on my GE washer?
Start by checking and cleaning the drain pump filter, which is the most common source of blockages. Next, inspect the drain hose for kinks or clogs at the standpipe connection. If those are clear, test the drain pump for proper operation and inspect the pressure sensor air tube for cracks or kinks. Replacing a failed pump or pressure sensor will be required if the components themselves are defective.
Will resetting my GE washer clear error code 18?
A reset may clear the code temporarily, but if the underlying cause is not resolved, the error will return as soon as the washer attempts another drain cycle. The pressure sensor must confirm an empty tub within the allotted drain time for the cycle to complete successfully. Resetting without addressing the blockage or faulty component is not a lasting fix.
Is it safe to use my GE washer when error code 18 is showing?
It is not advisable to continue running the washer while this error is active. The machine stopped the cycle because it could not confirm the tub drained properly, and running additional cycles risks leaving standing water in the drum, potential overflow situations, or additional stress on the pump motor. Resolve the drainage issue before resuming normal use.
How much does it cost to repair a GE washer showing error code 18?
If the fix is simply clearing a clog from the pump filter or hose, the repair may cost nothing beyond your time. Replacing a drain pump typically runs between $75 and $200 depending on the part cost and whether you hire a technician. Pressure sensor replacement is generally less expensive, often falling in the $30 to $100 range for parts, with additional labor costs if a professional is involved.

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