How to Clean a Dishwasher Filter and Clear the Drain

Most dishwasher drain codes (LG OE, Whirlpool F9E1, GE C1/FTD) start with a dirty filter, a kinked hose, or a clogged air gap. This 10-minute routine covers all three.

Safety first: Unplug the appliance (or switch off its breaker) before you remove panels, filters or hoses. Turn off the water supply valves before you disconnect any hose, and keep a towel and shallow pan handy. Never work on wiring, gas lines or sealed refrigerator systems yourself.

Check your model: Filter and hose locations vary. Follow your manual where it differs.

Steps

Turn the dishwasher off at the breaker or unplug it.
Pull out the bottom rack and scoop out any standing water and debris.
Twist the filter counterclockwise and lift it out. Careful, as stainless edges can be sharp.
Scrub it under warm running water with a soft brush.
Reinstall the filter until it locks.
Under the sink, straighten the drain hose and move anything pressing on it.
Pop off the air gap cap (if you have one) and clear debris; run the garbage disposal.
New disposal? Make sure the knockout plug was removed.

Tips

Clean the filter monthly.
Use dishwasher detergent only. Dish soap causes suds and leaks.

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