A dishwasher can run for years while its filter stays out of sight
beneath the lower rack. Then dishes start coming out gritty or the tub
smells stale. The first step is to find the model number and look up its
specific cleaning procedure; some designs have a removable filter and
others differ.
Turn the machine off and follow the manual to remove and rinse an
accessible filter. Reassemble it fully before the next cycle. Check the
spray arms for blocked openings if the manufacturer allows it, and wipe
debris from the door gasket. Whirlpool’s
filter instructions are an example of how model-specific the removal
and reinstallation can be. Don’t pry at a part that doesn’t release the
way the manual describes.
While the dishwasher runs, look at the floor in front and the
accessible cabinet area nearby. A wet toe kick, recurring standing
water, or a door that no longer seals deserves appliance service or a
qualified plumber, depending on the source. Continuing to run a leaking
machine can damage the cabinet before the problem is obvious from
above.
A cleaning cycle is useful when the manual recommends one, but it
won’t repair a bad inlet, hose, pump, or gasket. Keep a note of the
model and filter location for the next cleaning. I have local service
contacts on Helpful
Resources and leak sensors and basic supplies on Homeowner
Tools & Supplies.