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LG Dishwasher Not Cleaning Dishes

Dishwasher Not Cleaning Dishes is usually one of a small number of specific, repairable causes — here's what to check and when it's worth calling a professional.

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Condensation at a door seal during an appliance repair visit in San Jose, California
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Common Causes

Hardness the detergent was not dosed for

A machine set up on the imported blend and then fed groundwater leaves film and poor rinsing that reads as a pump or spray-arm fault.

A clogged filter or drain line

The single most common cause of drainage and cleaning-performance complaints.

A failed door latch or control fault

Many dishwashers won't start at all if the door sensor doesn't register a full, secure close.

Local conditions that matter here

This is the local fact that matters most for anything plumbed. Groundwater at 11 to 26 grains per gallon is harder than Las Vegas; the imported blend at 4.5 to 9 is not. Two houses a few streets apart get genuinely different water, so a descaling interval that works at one address is wrong at the other, and a softener sized for a previous house is usually wrong at this one.

What You Can Check Yourself

Check and clean the filter at the bottom of the tub
Confirm the door latches fully and the cycle selector is set correctly

Parts That Most Likely Need Replacing

Based on symptoms like this, these are the components our technicians check first. The exact part depends on your model and what we find during diagnosis.

Drain Pump
Door Latch Switch
Wash Pump / Spray Arm Assembly

In and around San Jose

San Jose — The tenth-largest city in the country and effectively a dozen markets, with pre-war stock through Willow Glen and the Rose Garden and large newer estate housing in Almaden Valley and Silver Creek. We also cover Alum Rock, Burbank, Cambrian Park across San Jose.

ZIP codes we cover in San Jose: 95002, 95008, 95013, 95042, 95101, 95103, 95106, 95108

Most cases like this are fine to schedule within a day or two, though it's worth having looked at before it gets worse. Our repair service covers same-day diagnosis and a flat-rate quote before any work begins.

Common Questions About Dishwasher Not Cleaning Dishes

Can I keep using my LG appliance while this happens?
If it's still working normally otherwise, short-term use usually isn't harmful — but a persistent issue means something is actively failing, and continuing to run the unit can turn a smaller repair into a larger one. We'd recommend having it looked at within a few days rather than waiting until it fails entirely.
Will dishwasher not cleaning dishes go away on its own?
Occasionally a one-off glitch clears itself after a power cycle, but if it's a specific component wearing out, it will keep coming back and typically gets worse over time rather than resolving on its own.
How much does this repair typically cost?
It depends on which component is at fault. We charge a flat diagnostic fee and provide a firm quote before any repair work begins — see our repair pricing page for typical ranges.
How long does a typical repair visit take?
Most single-component repairs are completed in one visit, often within an hour or two once the part is confirmed. We'll give you a specific estimate after diagnosis.
Do you offer a warranty on the repair?
Yes — every repair includes a written warranty of up to 1 year on parts and labor.
Do you service LG appliances in my area?
Likely yes — we cover San Jose and 37 surrounding communities. See our full service area list to confirm.

Still having this issue?

Same-day diagnosis, genuine OEM-compatible parts, warranty of up to 1 year.

Call (408) 341-6911

*SubZero Repair San Jose is an independent repair company and is not affiliated in any way with Sub-Zero, Inc., Wolf Appliance, Inc., or any of their distributors. We are not a factory service provider and specialize exclusively in out-of-warranty appliance repairs.

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1901 S Bascom Ave, Campbell, CA 95008 · (408) 341-6911
Call (408) 341-6911