Why Is My Dishwasher Not Cleaning Dishes?

A dishwasher can hum through an entire cycle and still hand back plates that are filmy, gritty or plainly dirty. When that happens, the more telling question is not how much soap went in but whether water is reaching every dish with enough force, heat and volume to do the work. Reading the pattern of what stays dirty is where a useful diagnosis begins.

Read the pattern before blaming the detergent

The dishes themselves carry clues. If only the upper rack comes out poorly while the lower rack sparkles, that split points toward the upper spray arm or the tube that feeds it, since a blockage there can leave the top of the tub underserved while the main circulation keeps cleaning below. When every rack disappoints in the same way, the issue more often sits with the shared parts: the main wash pump, the overall fill, or a filter that has changed how water recirculates. Note which racks fail, whether food is redeposited or simply never removed, and whether it happens on every setting. Those observations shape where an on-site check starts.

What actually moves and heats the water

Clean results depend on a chain of conditions holding together. Spray arms have to spin freely and keep their jets clear; a tall pot or utensil that stops an arm from rotating, or mineral buildup narrowing the jets, can quietly cut coverage. Behind them, the wash pump and its circulation motor supply the pressure, and a weakening motor is one possible reason spray force falls off. The fill matters just as much: if the inlet valve or the float limits how much water enters, there may simply be too little in the tub to wash properly. Temperature is the quiet partner in all of this, because wash water that never gets warm enough struggles to dissolve detergent and lift grease, leaving a film that looks like a soap problem but is really a heat one. Any of these can be the cause, and similar-looking residue can come from different sources, so a plate’s appearance alone should not decide which part gets touched.

Rule out the water and the soap first

Before anything mechanical is suspected, it is worth confirming the confounders that have nothing to do with the appliance. Hard water is common across much of the GTA, and its minerals leave cloudiness and spotting that imitate a wash fault. Detergent that is old, underdosed, or wrong for your water can do the same. Running the machine with a fresh, correctly measured detergent and, where appropriate, a rinse aid gives a cleaner baseline to judge against. If dishes still come out poor after that, the evidence points back toward the machine and a proper look is the sensible next move.

Keeping the check safe

Stick to the maintenance the owner’s manual actually invites: clearing the accessible filter, wiping the arms, checking that nothing blocks their spin. Leave the pump housing, wiring and inlet plumbing alone, and never force a stuck spray arm or pour harsh chemicals in to chase an unknown fault. If the dishwasher leaks onto the floor, smells hot, trips the breaker or shows scorched wiring, stop using it and leave the deeper inspection to a technician. Jotting down the model number and exactly what you see saves time at the appointment.

Bringing Riko in

When self-checks run out, a visit sorts the possibilities out by testing rather than guessing. Riko books a flat $89 diagnostic to inspect the filter, spray action, fill, heating and accessible controls, and that fee comes off your bill the moment you approve the work. Most dishwasher fixes land between $150 and $350 once the fault and any part are pinned down, and if you have not used us before, $40 comes off the repair under the current offer. We are a licensed and insured team serving Toronto and the GTA, backed by a workmanship warranty, and we work strictly on residential electric appliances. Gas units and their lines, restaurant and other commercial machines, and sealed refrigeration or compressor work all fall outside what we handle. Dishwashers are the one appliance we also install; for fridges, washers, dryers and ovens we repair only.