The short answer
The usual answer on this unit is a filter and sump full of debris, with spray arm holes blocked with scale or debris next. Both are about water not reaching the soil, and neither needs a part. Everything above the last cause is owner work with no tools and no panel off.
The symptoms, and their near misses
- The cycle sounds quieter than it used to — A spray arm that is not turning makes less noise, and that is a real clue.
- A white film on glasses that wipes off — Hard water and rinse aid rather than a machine fault.
- NEAR MISS: the machine will not start the cycle at all — Read the page on a unit that will not start instead.
What it usually turns out to be, in order
- A filter and sump full of debris — The filter under the lower arm catches food soil so it is not sprayed back. Full, it recirculates grit over everything and starves the pump at the same time. It leads the list on a White-Westinghouse dishwasher because it is a consumable maintenance job that is not mentioned at the point of sale, so most machines have never had it done.
- Spray arm holes blocked with scale or debris — The jets are small and they block from the inside with grit and from the outside with scale. Next, and for a closely related reason: in a hard-water area it happens to every machine eventually, and it produces exactly this slow decline rather than a sudden failure.
- Loading that blocks the spray arms — A tray laid flat, a handle hanging through the rack or a tall pot in the wrong place stops an arm turning. Third on the list, and worth the look because it is free to rule out, it changes with every load, and it explains the pattern where some items are clean and others are untouched.
- A weak wash pump or a stuck diverter valve — The pump makes the pressure and the diverter shares it between the arms. Last, and that is the point of this order: everything above it produces the same dirty dishes for nothing, and this one is the only parts job on the list.
The order to check in
- Twist out the filter under the lower spray arm and look at it — If it is packed, you have found both the grit and the poor cleaning.
- Take the arms off and hold them up to the light — Blocked jets are obvious once the arm is off the machine.
- Spin both spray arms by hand with the racks loaded as usual — Anything that stops an arm is your fault, and you can see it in seconds.
The checks you can make yourself
- Twist out the filter assembly, wash it under a hot tap with a brush, and clear the sump beneath it — Refit it and check it locks: a filter left loose lets debris straight into the pump.
Tools: a washing-up brushAbout 20 min
- Unclip both spray arms and clear every jet with a cocktail stick, then rinse them through — Do not use a needle or wire: it opens the jets out and changes the spray pattern.
Tools: a cocktail stickAbout 20 min
- STOP AT THIS POINT if the next step needs a meter on live terminals — That is where an owner check ends and a service call begins.
Before you open anything
Safety
Kill the power at the breaker, or unplug the machine, before a panel comes off, and close the supply valve under the sink before you touch a hose. The element in the sump holds heat long after a cycle ends, so give it time before you reach in. Never run the machine with its kick plate off, and never wedge a door latch to make a cycle start.
The line between a fix and a service call
Call once the filter is clean, the arms turn freely and spray properly, the detergent is fresh and the water is arriving hot, because at that point the machine is not making pressure. Call sooner if you see water outside the machine or it trips a breaker.
Nearest pages of this class
What is deliberately not on this page
This page covers the White-Westinghouse dishwasher as a class, not one family or model line. Where a family- or model-specific page exists it is linked here. Deliberately not here: pump part numbers, diverter test procedures and any wiring detail, all of which differ by family and belong on the page for that family.
Links: - [Water escaping from a White-Westinghouse dishwasher, and where it comes from](/blog/white-westinghouse-dishwasher-water-leak) - [White-Westinghouse refrigerator not cooling: what it usually means](/blog/white-westinghouse-refrigerator-cooling-failure) - [Why a Westbend dishwasher is leaving dishes dirty](/blog/westbend-dishwasher-cleaning-performance)
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
