Question 1

how do i adjust the coffee strength on this thing? the knob doesn't seem to change much.

Accepted Answer

DIAGNOSIS You're likely confusing the two main controls. The grind size knob (often numbered 1-7) changes how fine the beans are ground. The coffee quantity knob (often with a cup icon) changes how much ground coffee is dosed into the basket. Strength is a combination of both. FIX For a stronger, more intense shot: 1) First, adjust the grind size to a finer setting (a lower number). This creates more resistance for the water, leading to a slower, richer extraction. 2) Then, adjust the coffee quantity to a higher setting (more grams of coffee). This gives you a thicker coffee puck. Make one change at a time and taste the result. Start with the grind. If you go too fine, the machine might struggle or the coffee will taste bitter. IF THAT DIDN'T WORK If the coffee still tastes weak after adjusting both, your beans might be the issue. Old, stale, or lightly roasted beans will naturally produce a weaker, flatter taste. Try a fresh, dark roast espresso blend and run a cleaning cycle to ensure no old oils are contaminating the flavor. HEADS UP The grind setting is sensitive. Only adjust it while the grinder is running (press a single coffee button without a cup underneath). A quarter-turn can make a big difference. Don't force it past its stops. And remember, a stronger shot isn't just about volume—it's about the quality of the extraction.

Question 2

the machine turns on and heats up but when i press brew, nothing happens, no pump sound.

Accepted Answer

DIAGNOSIS This is often a simple but frustrating one: the machine thinks the brew group isn't fully locked into place. There's a safety microswitch that prevents operation if it's not correctly seated. FIX 1) Make sure the machine is on and warmed up. 2) Open the front service door. 3) Pull the brew group release lever to eject the brew group. 4) Inspect it. Make sure there's no old coffee puck stuck in it and that it's clean. 5. Reinsert it firmly. You should feel a distinct click and see it sit flush. Sometimes you need to give it a little extra push at the end of its travel. Close the service door and try the brew function again. IF THAT DIDN'T WORK If it's definitely seated correctly, the microswitch itself might be faulty or have a loose connection. You can try unplugging the machine for a few minutes to reset the electronics. If the problem is consistent, accessing and checking that switch involves taking off the outer casing, which is a more advanced repair. HEADS UP Always remove and rinse the brew group regularly. If coffee grounds and oils build up on its sides or the tracks it slides on, it can prevent it from sliding all the way home, triggering this exact problem. A quick weekly rinse prevents this.

Question 3

i just got a used magnifica s and the coffee tastes terrible, like burnt plastic or chemicals.

Accepted Answer

DIAGNOSIS That's classic "new machine taste" or, in your case, "old-stored-machine taste." The internal plastic water lines and the boiler need a good flushing to clear out any stale water, manufacturing residues, or cleaning solution from the previous owner. FIX Don't use coffee beans for this. 1) Fill the tank with fresh, cold water. 2) Place a large cup under the coffee spout. 3) Run multiple cycles of just hot water through the machine. Use both the coffee brew function and the hot water dispenser. Do this until you've run at least 2-3 full tanks of water through. 4) Remove and thoroughly clean the brew group, drip tray, and water tank with mild soap and water. Let them air dry. IF THAT DIDN'T WORK If the bad taste persists, the previous owner might have used a non-food-safe cleaner or descaler, or there's mold/mildew. You'll need to run a proper descaling cycle with a food-grade descaler (like De'Longhi EcoDecalk), followed by several more rinse cycles with fresh water. HEADS UP The first few cups from any new or long-unused machine will often taste off. This flushing process is essential. Also, if they used vinegar to descale, that taste can linger; a commercial descaler does a better job without the smell.

Question 4

steam wand just drips or sputters weak steam, won't froth milk properly anymore.

Accepted Answer

DIAGNOSIS The tiny holes in the tip of the steam wand are almost definitely clogged with dried milk and mineral scale. It's a maintenance item, not a breakdown. FIX First, always purge the wand by releasing a burst of steam into an empty cup right after frothing. For the clog, you need to soak the tip. Remove the steam wand tip if possible (it usually unscrews). Soak it in a cup of hot water with a drop of dish soap or some espresso machine cleaner for 30 minutes. Use a pin or the special tiny cleaning tool that came with the machine to gently poke through each hole. Reattach and run steam into a cup of water to clear any remaining debris. IF THAT DIDN'T WORK If the wand still sputters after cleaning the tip, the internal steam valve or pipe might have a scale blockage. This would require running a full descale cycle (see the three-light-flashing fix above), as the descaler solution also runs through the steam system. HEADS UP Get in the habit of wiping the steam wand with a damp cloth immediately after each use, before the milk cooks onto it. That single habit will prevent 90% of these clogs. Never let milk sit inside or on the wand.

Question 5

my machine says it's out of water but the tank is completely full, what's going on?

Accepted Answer

DIAGNOSIS The float switch in the water tank—that little white plastic piece that moves up and down—is likely stuck or the sensor contacts are coated with mineral scale. The machine can't tell there's water, so it won't operate. FIX 1) Remove the water tank. 2) Look at the bottom where it connects to the machine. You'll see the float assembly. Gently push up and down on the float with your finger to make sure it moves freely. 3) If it's sticky, clean it. You can soak the bottom of the tank (or just the float area) in a mix of warm water and a little white vinegar for 20 minutes to dissolve any limescale. Scrub gently with a soft brush. 4) Rinse thoroughly and dry the contacts on both the tank and the machine's base with a clean cloth. Reinstall the tank firmly. IF THAT DIDN'T WORK The sensor in the machine's base might be faulty. Try unplugging the machine for 10 minutes to reset the electronics. If the problem comes back immediately, there might be a wiring issue or a failed sensor that needs professional attention. HEADS UP Always use filtered or softened water if you can. Hard water minerals are the main cause of this float sticking. If you see a white crusty buildup anywhere in the tank, that's scale, and it's time for a descale cycle too.

Question 6

coffee keeps coming out really weak and watery no matter how fine i set the grind, help?

Accepted Answer

DIAGNOSIS This usually points to the brew group—the part that holds the coffee puck—not building enough pressure. The most common culprits are a worn-out seal/gasket or old, clogged shower screens, not the grind. FIX Start with a deep clean of the brew group. Remove it (usually by pressing a lever or button to eject it). Rinse it under warm water. Pay special attention to the two metal shower screens (one on the machine, one on the brew group). Use a small brush, like an old toothbrush, to scrub away any baked-on coffee oils. Let everything air dry completely before reinserting. Also, check the rubber seal (gasket) where the brew group locks in. If it's cracked, hard, or flattened, it needs replacement. IF THAT DIDN'T WORK If cleaning doesn't help, the issue might be with the pump itself losing strength, but that's less common. Before assuming that, make sure you're using enough coffee. Adjust the "coffee quantity" knob to a higher setting so the machine doses more grounds per shot. A fuller basket creates better resistance. HEADS UP Oily, dark roast beans can gunk up the shower screens much faster. Performing this brew group rinse every week or two if you use it daily will prevent most weak coffee issues. Don't use soap, just water and a brush.

Question 7

the grinder on my delonghi magnifica s is making a horrible loud screeching or grinding noise, is it broken?

Accepted Answer

DIAGNOSIS That awful noise is almost certainly a small rock or a super-hard, dried-up bean fragment that got caught in the burr grinder. It's a common issue with automatic machines. The grinder isn't broken, it's just jammed. FIX First, unplug the machine. You need to get to the grinder burrs. Remove the bean hopper by twisting it counter-clockwise and lifting it off. Look down into the grinder chamber—you might see the offending piece. Use a small flashlight and a pair of long-nose pliers or tweezers to carefully extract any foreign object or rock-hard bean bit. Then, manually turn the top burr (the one that moves) with your fingers to make sure it spins freely. Reattach the hopper, plug it in, and try grinding on a coarse setting with a few fresh beans. IF THAT DIDN'T WORK If the noise persists after clearing visible debris, a piece might have fallen deeper or a burr could be damaged. You'll need to remove the top burr assembly. With the hopper off, there's usually a plastic ring you can unscrew or tabs you depress to lift the whole burr carrier out for a more thorough inspection and cleaning. HEADS UP Always check your beans before pouring them in. A single small stone can cause this. Also, if you leave beans in the hopper for months, the oils can go rancid and the beans can become extremely hard, increasing the chance of this happening.

Question 8

my magnifica s is just showing three flashing lights and won't make coffee, what do i do?

Accepted Answer

DIAGNOSIS That's the machine's way of telling you it needs a descale. The three flashing lights (usually the coffee, steam, and hot water lights) is the universal "descaling required" signal on these De'Longhis. It's not a breakdown, just maintenance time. FIX You'll need to run the descaling program. First, get a bottle of De'Longhi-branded descaler or a citric acid-based descaler made for espresso machines. Don't use vinegar. Empty the drip tray and water tank. Mix the descaler with fresh water in the tank as the bottle instructs. Put a large container under both the steam wand and the coffee spout. Turn the machine on, press and hold the steam button for about 5 seconds until all the lights start flashing. The machine will now pump the solution through. It'll take 20-30 minutes. When the tank is empty, refill with fresh water and run the program again to rinse. IF THAT DIDN'T WORK If the lights keep flashing after a proper descale cycle, the machine might not have registered it. Try unplugging it from the wall for a full five minutes to do a hard reset, then plug it back in. Sometimes the control board just needs a fresh start. HEADS UP Don't ignore this. If you keep trying to use it with the descale light on, you can eventually get scale blocking the internal thermostat, which is a much pricier fix. Run the descale every couple of months if you have hard water.

De'Longhi Magnifica S Automatic Espresso Machine

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