Dishwasher not cleaning like it used to? If you own an LG dishwasher in San Mateo and notice the spray arms seem stuck or aren’t spinning, don’t panic just yet. At Triton HVAC & Appliance Repair, we’ve seen this issue pop up across the Bay Area — and there are straight-forward steps to diagnose the problem before you need a pro.
What Do the Spray Arms Do, and Why Do They Get Stuck? Spray arms are critical to ensuring dishes actually get clean. These rotating arms—or sometimes tubes—use water pressure to spin, spraying jets of water to remove food and debris. If they stop spinning, water can’t reach every dish, leading to residue, spots, and frustration.
In LG dishwashers, the spray arms may get stuck for several common reasons: - Obstructions blocking movement - Buildup of debris or hard water - Issues in water pressure or inlet
What Should You Check First? 1. Inspect for Obstructions It’s more common than you’d think: utensils, large items, or utensils with long handles may block the arms. After running a cycle, open the dishwasher and try rotating the spray arms by hand. If you feel resistance or can’t move them, remove any items in the way.
2. Check for Debris and Mineral Buildup Sometimes, buildup inside the spray arm holes or around the spindle causes them to stick. Carefully remove the spray arms—they usually unscrew or pop off—but consult your LG model manual for exact instructions. Rinse holes with water, and use a toothpick or soft brush to clear stubborn gunk. Soaking the arms in a mix of vinegar and warm water can dissolve tough mineral deposits.
3. Confirm the Lower Arm Isn’t Jammed by the Filter LG dishwashers typically have a filter near the bottom. If the filter is not locked in correctly, it might push up against the spray arm. Double-check the filter is seated properly and both arms are free to rotate.
4. Observe Water Inlet and Pressure Spray arms rely on strong water pressure to turn. If the dishwasher’s not filling properly, inspect the water inlet valve, supply line, and the screens for blockages. Low pressure or reduced flow can prevent the arms from spinning. Confirm that home water pressure isn’t abnormally low.
5. Listen for Unusual Noises During a wash cycle, listen for rattling, grinding, or silence—these can indicate a broken spray arm, seized bearing, or failed motor. While some issues require a professional, a quick listen can prevent further damage.
When DIY Stops Working If you’ve made these checks and the spray arms are still not spinning, or if you’ve noticed cracks, loose movement, or leaks from around the arm’s base, it may be time to call in a professional. The issue could extend into the pump, circulation motor, or subtle mechanical failures best left to qualified hands.
Why Trust Triton HVAC & Appliance Repair? We’re your experienced, local choice for appliance repair in San Mateo and the Bay Area. Every repair comes with a 180-day labor warranty. Our appliance service call is $89—but we waive that charge if you approve the recommended repair. For LG dishwashers, our goal is to get you back to clean dishes without hassle or wasted cost.
Need professional help or want the peace of mind of a thorough inspection? Book online at triton-home-services.com or call (888) 993-5699 to set up service. With Triton HVAC & Appliance Repair, your home—and your dishwasher—are in good hands.