The washer’s hoses live in a cramped space, so a small leak can stay
hidden until it reaches the floor below. When the machine is idle, take
a look with a flashlight rather than dragging it out by the hoses. Note
the age and visible condition of the supply lines, fittings, and drain
connection.
Look for bulges, kinks, rust at the connections, drips, and a hose
pressed sharply against the wall. Follow the washer manual for
drain-filter cleaning if the model has an owner-accessible filter; have
a towel and shallow pan ready because water may come out. Make sure the
drain hose remains secured at the standpipe or sink, but do not seal it
in a way that defeats the required air gap or arrangement.
A worn supply hose should be replaced with a compatible product and
properly fitted connection. If a shutoff is stuck, a fitting leaks, or
there is evidence of water behind the wall, use a qualified plumber.
After any service, run a cycle and look again for slow drips. A pan and
leak sensor can provide extra notice, but neither repairs a failing
connection.
Keep a note of the installation or replacement date. I list local
plumbers on Helpful
Resources and leak sensors and basic maintenance items on Homeowner
Tools & Supplies.