Whirlpool Dishwasher Repair in Toronto — Not cleaning / dishes still dirty

• On the Whirlpool W10/HE tall-tub platform the wash-failure that actually leaves the unit full of dirty dishes reads as F4E3 (4-3 on no-display WDT/WDF models via the Clean-light blink pattern): in the field this points to the wash/circulation-pump fault - the machine fills and drains normally but the pump never pressurizes the spray arms, so nothing gets scrubbed (a shorted pump winding or a lost board-to-pump communication line). Note that some model generations map F4E3 to a heating error on Whirlpool's own code chart, so we confirm by the actual won't-wash symptom and a pump ohm reading, not by the code alone. We back-probe the pump connector and ohm the motor for a shorted/open winding before condemning anything, because a chafed harness or loose spade at the pump reads identical to a dead pump - a fresh circulation pump on a broken wire still won't wash. Only a genuinely failed motor gets the model/serial-coded wash-pump assembly, ordered against the data plate, not guessed off the code.
• The F9-family (F9E1, read 9-1) is the diverter fault and the signature 'only one rack comes clean' complaint on this platform: the diverter motor rotates a disc in the sump that alternates water between the lower and upper spray arms, so when the control can't confirm disc position (or the disc strips) water is stuck feeding one level only - bottom rack spotless, top rack still food-caked, or vice-versa. The genuine cure on a confirmed motor/disc fault is the diverter motor & disc assembly W10537869 (supersedes/cross-references 2684962, W10195076, AP5650272, W10476222, W10849439; the W10843811 diverter motor is the sibling on some WDT730/WDT750 builds). We enter the service diagnostic and run the diverter step to hear it cycle before quoting - a disc merely gummed with hard-water scale can sometimes be cleaned rather than replaced.
• A diverter that motors fine but still washes one rack weakly points at the diverter shaft seal W10195677 (WPW10195677): it's the rubber grommet the diverter shaft turns inside, and when it perishes the diverter loses its pressure boundary - water bypasses instead of being driven up to the upper arm, so the top rack washes soft and finishes dirty (and you often find seep water at front-centre on the floor as the same tell). Whirlpool now wants the whole diverter motor sold for this, but the seal is the real fault; we silicone-grease and seat the new grommet (it sits slightly taller) rather than condemning a healthy W10537869 motor on what is a cheap seal.
• Film and gritty redeposit on dishes that supposedly 'washed' is most often the food chopper, not the spray system: the 4-blade chopper W10083957 (current OEM W10083957V; supersedes WP8268383 / 8268383) minces food fine enough to drain, and when the blade dulls or a popcorn kernel or glass shard jams it, particles survive the cycle and resettle on the load as a sandy film. We pull the lower arm and filter and inspect the chopper directly - a worn chopper is a cheap, high-impact fix owners almost never suspect, and it cross-references the same Whirlpool part across KitchenAid/Maytag/Kenmore 665 sister tubs.
• Cold wash water leaves a greasy film that looks like a wash failure but is a heat fault: the tub-floor heating element W10518394 (supersedes W10134009 / 8194250 / W10441445) raises the main-wash water to the temperature that dissolves grease and activates detergent, so an open element means the cycle runs cool, detergent never fully dissolves, and dishes finish greasy/filmed even though the arms are spinning. We ohm the element for continuity (and sanity-check the wash thermistor, since a cold-biased temperature reading mimics a dead element) before quoting heat - a $90 element thrown at a thermistor problem is the classic mis-diagnosis.
• Detergent that's still caked in a shut dispenser cup at cycle end is the 10-1 (FAE1) dispenser fault: the cup's wax-motor actuator never popped the door, so the main wash ran with no detergent and the load comes out dirty with a full, soggy detergent puck still in the cup. We confirm the cup actually releases on the wash phase (it's the dispenser-cup wax motor on FAE1/10-1, NOT the vent wax motor that throws FAE2/10-2) before quoting the detergent/rinse-aid dispenser assembly W10861000 (supersedes W10620296 / W10620298) - a sticky cup latch or a hardened dispenser flap from GTA scale is sometimes a clean-and-free fix, not a part.
• A large share of Toronto dishes-dirty calls are not a broken machine at all but hard-water chemistry plus a clogged filter and scale-plugged spray-arm jets: a fouled cylindrical filter (quarter-turn counter-clockwise to unlock) starves the wash, and lime-blocked jets stop the arms sweeping so only the rack centre washes. We flush the filter and sump, clear both arms' jets with a pin, set rinse-aid up for hard water, and recommend an affresh cleaner run - cloudy film that wipes off with vinegar is mineral deposit, not a parts problem, and we demonstrate a clean load on the way out rather than selling a chopper or diverter on a water-quality issue.

Whirlpool not cleaning / dishes still dirty in Toronto — the local specifics

• The recurring Toronto pattern on Whirlpool dishes-dirty is the split-rack tell: a unit that cleans the bottom rack but leaves the top rack food-caked almost always traces to the diverter (F9-family motor/disc W10537869 or a perished W10195677 shaft seal), while an all-over greasy film points instead at cold wash from an open W10518394 element or detergent never releasing on a 10-1 dispenser fault. In our hard-water service area we also see a steady run of 'machine is fine, water is the problem' calls - scale-plugged jets and a fouled filter masquerading as a wash failure.
• We bring the platform dishes-dirty kit to these calls: diverter motor & disc W10537869 with the W10195677 shaft seal, food chopper W10083957/W10083957V, heating element W10518394, and the dispenser assembly W10861000 - plus a pin and affresh cleaner to clear scale-plugged arms and demonstrate a clean load when the real fault is Toronto water, not a broken part.

For the full Whirlpool dishwasher module — every fault, part number and code — see Whirlpool dishwasher repair in Toronto, and for the same fault across all brands the dishwasher not cleaning / dishes still dirty guide.