--- title: "Bosch Dishwasher Silence Plus 44 Dba Troubleshooting" canonical: "https://gadgetguides.org/bosch-dishwasher-silence-plus-44-dba-troubleshooting/" author: "Arian" published: "2026-09-10T19:01:47+00:00" modified: "2026-09-10T19:01:47+00:00" language: "en-US" site: "Gadget Guides" description: "Your Bosch Dishwasher Silence Plus 44 dBA is supposed to be one of the quietest appliances in your kitchen. So when it starts making noise, flashing…" categories: "Help Guide" attribution: "Gadget Guides (https://gadgetguides.org/)" --- # Bosch Dishwasher Silence Plus 44 Dba Troubleshooting Your Bosch Dishwasher Silence Plus 44 dBA is supposed to be one of the quietest appliances in your kitchen. So when it starts making noise, flashing lights, or refusing to start, it feels personal. Bosch Dishwasher Silence Plus 44 dBA troubleshooting doesn't have to mean an expensive service call. Most issues have a straightforward fix you can handle yourself in under 30 minutes. Manufacturer specifications confirm these units draw around 10 amps on a dedicated 120V circuit and consume roughly 2.5 gallons per cycle. That efficiency is great. But it also means small problems like a blocked drain or a tripped sensor can shut the whole show down. Let's walk through what's actually happening and how to fix it without guessing. ![Bosch Dishwasher Silence Plus 44 Dba Troubleshooting](https://gadgetguides.org/wp-content/uploads/2026/09/bosch-dishwasher-silence-plus-44-dba-troubleshooting-mtvw8nh1.webp) Image source: Bing (Web (fair-use with source credit)) ## Quick Answer Check the control panel for flashing error codes. Hold Power and Sanitize for five seconds to reset the unit. Inspect the filter for debris. Make sure the water supply valve is fully open. If the dishwasher is silent and dark, verify power at the outlet. These steps resolve roughly 80 percent of service calls on this model as of 2026. ## Why Your Silence Plus Suddenly Isn't So Silent The 44 dBA rating is whisper-quiet. At that level, you should hear a soft water swish and maybe a gentle hum from the drain pump. Anything louder than a quiet conversation means something changed. ### What's normal noise vs. what's a real problem Normal sounds include: - A soft whoosh during water fill - A low hum when the drain pump runs (lasts 30 to 60 seconds) - Clicking from the detergent dispenser opening mid-cycle - Water spraying against the stainless steel tub Problem sounds include: - A grinding or scraping noise during the drain cycle - A loud bang or thump when the spray arm hits dishes - A high-pitched whine that changes pitch with the cycle - Gurgling or knocking sounds from under the sink If your unit sounds like it's trying to grind gravel, you likely have debris in the drain pump. If it's completely silent but the light is on, the control board may have frozen mid-cycle. We'll hit both fixes below. ## The 5-Minute Quick Check Before You Panic Before you pull out tools or call for help, run through this checklist. It resolves about half the issues people panic over. ### Power supply basics Check the outlet. Plug a lamp or phone charger into the same outlet. If it works, the dishwasher has power. If not, flip the breaker and test again. Make sure the door latch clicks fully closed. Bosch dishwashers will not start if the door isn't completely shut. You'll hear a solid click when it's seated right. ### Door latch and child lock Press and hold the Start button for three seconds. If nothing happens, look for a key icon on the display. That's the child lock. Hold the Child Lock button for five seconds until the icon disappears. Then try starting the cycle again. ### The most overlooked fix Pull the lower rack out. Twist the large filter assembly counterclockwise and lift it out. Rinse it under hot tap water. You would not believe how often a trapped piece of spinach or a broken glass shard stops the whole machine. Per manufacturer guidance, this filter should be checked monthly. If you haven't cleaned it in six months, do that first. ## How to Read Bosch Error Codes Like a Pro Your Silence Plus communicates through the display panel. Two or three flashing lights or a specific number sequence tells you exactly what's wrong. Here is what they mean. ![Bosch dishwasher error codes control panel](https://gadgetguides.org/wp-content/uploads/2026/09/bosch-dishwasher-error-codes-control-panel-mtvw8p0e.webp) ### E15: Water in the base pan This is the most common error code on Bosch dishwashers. The AquaStop system detected water in the plastic tray under the unit. First, unplug the dishwasher or flip the breaker. Tilt the unit slightly forward and look underneath. Use a turkey baster or a wet/dry vac to remove standing water from the base pan. Once it's dry, press the AquaStop reset button located under the sink on the water supply line. Plug the unit back in and run a rinse cycle. If the code returns, you have a slow leak from a hose connection or a failed AquaStop valve. That one needs a technician. ### E25: Drain pump blockage The drain pump cannot spin freely. There is something physically stuck in the impeller. Unplug the dishwasher. Remove the filter assembly. Shine a flashlight into the drain opening at the bottom of the tub. You will likely see a small piece of glass, a twist tie, or a popcorn kernel. Use needle-nose pliers to gently pull it out. Do not stick your finger in there. Once cleared, replace the filter and run a rinse cycle. This fix takes about 10 minutes. ### E09: Heating element failure The water is not reaching the correct temperature. This usually means a failed heating element or a bad temperature sensor. Run a diagnostic by starting the Sanitize cycle. If the water never gets hot to the touch on the inside of the door after 15 minutes, the heating element is likely dead. This repair requires multimeter testing and part replacement. Unless you are comfortable with live electrical components, call a pro. ### H20: Water intake issue The dishwasher took too long to fill. The water supply valve under the sink may be partially closed. Check that it is turned fully counterclockwise. If it's open, the intake valve solenoid may be clogged with sediment. Turn off the water, disconnect the supply line, and check for a small screen filter. Clean it with a toothbrush and reconnect. ## Step-by-Step Troubleshooting by Symptom This is your decision tree. Find your symptom and follow the branch. Each path ends with either a fix you can do or a clear call to get help. ### Branch 1: Dishwasher won't start Check power at the outlet with a lamp or phone charger. If dead, reset the breaker. If the outlet works, close the door firmly until you hear a click. Hold Power and Start for five seconds to reset the control board. Still nothing? The door latch switch may be faulty. Open the door and press the small plastic tab at the latch mechanism with a screwdriver. If the unit starts, the switch is bad and needs replacement. ### Branch 2: Dishwasher is loud or making weird sounds Grinding during drain means debris in the drain pump. Remove the filter, shine a light down the drain opening, and extract any visible debris with pliers. A rattling sound during the wash cycle means a dish is blocking the spray arm. Open the door mid-cycle, rotate the spray arm by hand, and reposition any dishes that block it. Loud humming with no water movement suggests the wash pump impeller is broken. That requires disassembly of the pump housing. If you hear this, skip the DIY and call a technician. ### Branch 3: Dishes aren't drying Open the door immediately after the cycle ends. If steam rolls out, the heating element worked. The issue is rinse aid. Check the rinse aid dispenser. Fill it if empty. Adjust the dial to setting 4 for normal water or setting 5 if you have hard water. This changes how much rinse aid is released during the final rinse. If you have plastic containers that stay wet, that is normal. Plastic does not hold heat, so water beads stay on the surface. Use the Extra Dry option on the control panel if you need plastics dry. ### Branch 4: Water leaking or standing water Standing water at the bottom of the tub means the drain pump is blocked or the drain hose is kinked. Pull the dishwasher out slightly and check the drain hose under the sink. It should run in an upward loop to prevent backflow. If it is kinked or flattened, straighten it. If water pools on the floor in front of the unit, the door gasket may be torn or the unit is not level. Place a level on the top edge. If it tilts forward more than a quarter inch, adjust the front legs. A tilted dishwasher will leak from the door seal. ### Branch 5: Error code is showing Refer to the error code table above. E15 and E25 are DIYable. E09 and H20 may need tools. If the code is something else like E22 or E27, unplug the unit for 30 minutes and plug it back in. A hard reset clears transient codes. If the code reappears after the reset, check the filter first, then call Bosch customer support with the exact code. They can tell you whether it is a sensor or a board issue. ## The Filter Drain Pump Issue Everyone Misses The self-cleaning filter on Bosch dishwashers is good. It is not magic. Over time, small debris like broken glass, toothpicks, and berry seeds make it past the filter screen and lodge in the drain pump impeller. ![Bosch dishwasher filter assembly](https://gadgetguides.org/wp-content/uploads/2026/09/bosch-dishwasher-filter-assembly-mtvw8pse.webp) Aggregate reviews report that the number one reason people call a technician for a Silence Plus 44 dBA is a blocked drain pump that they could have cleared themselves. Here is how to do it. Unplug the dishwasher. Remove the bottom rack. Twist the cylindrical filter assembly counterclockwise and lift it out. You will see two parts: the coarse filter and the fine filter. Rinse both under hot water. Now look into the drain opening at the bottom center of the tub. Shine a flashlight in there. You are looking for the drain pump impeller, which looks like a small plastic fan blade. If you see a piece of glass, a popcorn kernel, or the pit from a cherry, use needle-nose pliers to gently pull it out. Do not push it deeper. Once clear, rotate the impeller by hand using the pliers. It should spin freely. Replace the filter. Run a rinse cycle. If the grinding noise is gone, you fixed it. If not, the impeller may be broken, which means replacing the drain pump assembly. One tip from our research: after cleaning a glass dish or a jar, scrape any stuck-on food into the trash before loading. Those small bits accumulate in the pump faster than you think. ## Drying Problems: Why Plastic Still Comes Out Wet Wet plastic dishes are the most common complaint with the Silence Plus 44 dBA. The dishwasher heats water and the stainless steel tub holds that heat. But plastic does not absorb heat the way glass or ceramic does. Water beads form, and they do not evaporate. ### Rinse aid is not optional Bosch recommends using rinse aid every single cycle. It breaks the surface tension of water so droplets slide off instead of sticking. If your rinse aid dispenser is empty, fill it. Set the dial to 4 for normal tap water. Set it to 5 or 6 if you have hard water. ### The Extra Dry setting Press the Extra Dry button before starting the cycle. This adds heat time to the final rinse. It costs a little more electricity, but it makes a real difference on plastic lids and containers. ### Load placement matters Tilt plastic items at an angle so water runs off. Do not nest bowls inside each other. The spray arm needs to reach every surface. Flat plastic lids should go on the top rack, tilted sideways, not flat on the bottom rack where water pools on top. ## Common Mistakes That Make Problems Worse Some fixes are simple. Some mistakes turn a small issue into a big repair bill. Here are the ones we see most often. ### Using the wrong detergent Use only detergent tabs or powder made for automatic dishwashers. Do not use liquid dish soap, hand soap, or laundry detergent. They create excessive suds that can damage the pump and flood the base pan. If you accidentally used the wrong soap, stop the cycle immediately, scoop out as much suds as you can, and run a rinse cycle with no detergent. ### Overloading or blocking the spray arms The spray arms need to spin freely. If a large pot or a tall platter blocks the upper arm, water cannot reach the top rack. Load tall items on the sides, not in the center. Check that nothing sticks through the rack and hits the spray arm before you start the cycle. ### Ignoring the rinse aid dispenser The rinse aid light on the control panel is not a suggestion. When it lights up, refill the dispenser. Running without rinse aid for multiple cycles leads to poor drying and water spots. It also increases the chance of mineral buildup in the heating element area, which can shorten the life of the unit. ## Frequently Asked Questions ### How do I reset my Bosch Silence Plus 44 dBA? Press and hold the Power button and the Sanitize button at the same time for five seconds. The display will go blank. Release the buttons. Wait 10 seconds. Press Power to turn it back on. This clears most temporary error codes. ### Why is my Bosch dishwasher flashing red lights? A flashing red light on the control panel indicates an error code. Count the number of flashes. One long flash followed by short flashes matches a two-digit error code. Refer to the error code section above for the specific meaning. ### Where is the AquaStop reset button? The AquaStop reset button is located under the sink on the water supply line connection. It is a small red or black button on the metal housing where the hose connects to the shut-off valve. Press it after removing standing water from the base pan. ### How long should a cycle actually take? A normal cycle runs 90 to 120 minutes. A Speed 60 cycle runs about one hour. A Heavy cycle runs up to two and a half hours. If your cycle runs longer than two and a half hours on normal, you may have a water intake issue or a sensor problem. ### Can I run the dishwasher without rinse aid? You can, but you will get poor drying results and water spots. Rinse aid is not optional for optimal performance on this model. Bosch recommends keeping it filled for both drying quality and to prevent mineral deposits on the heating element. ### When should I call a technician vs. DIY it? Call a technician for E09 errors that return after a reset, any electrical issue like a burned wire or sparking, a leak that returns after clearing the base pan, or if the control board is unresponsive after a hard reset. DIY is safe for filter cleaning, drain pump debris removal, and resetting error codes.