Keurig Descale Light Won’t Turn Off: 10 Fixes

Quick Fix

Keurig descale light won’t turn off? Run the descale cycle again with fresh descaling solution, then run at least 12 cleansing brews with plain water. If still on, unplug for 5 minutes, hold the power button, plug back in. The light needs multiple rinse cycles to reset.

Why Won’t the Descale Light Turn Off?

The Keurig descale light stays on when the machine still detects mineral buildup, the descale cycle wasn’t completed properly, or not enough rinse cycles were run. Some models require specific button combinations to reset the light manually after descaling.

Method 1: Complete Full Descale Cycle

Run the entire process from start to finish.

1. Empty the water reservoir completely
2. Add Keurig descaling solution and water (full bottle + water to fill line)
3. Place large mug on drip tray
4. Run brew cycles until reservoir is empty (no K-cup)
5. Let machine sit for 30 minutes with power on
6. Rinse reservoir thoroughly
7. Fill with fresh water
8. Run at least 12 rinse brews

Method 2: Multiple Rinse Cycles

The key is running enough water through.

1. After descaling, fill reservoir with fresh water
2. Run brew cycle (no K-cup)
3. Repeat until reservoir is empty
4. Refill and repeat – do this 3-4 full reservoirs
5. Light should turn off after sufficient rinsing

Method 3: Hard Reset Keurig

Reset clears stuck sensor readings.

1. Turn off the Keurig
2. Unplug from wall
3. Remove water reservoir
4. Wait 5 minutes
5. Hold power button for 5 seconds (while unplugged)
6. Reattach reservoir
7. Plug in and turn on

Method 4: Reset Descale Light (K-Supreme/Plus)

These models have a specific reset procedure.

1. Press and hold 8oz and 12oz buttons together
2. Hold for 5 seconds
3. The descale light should turn off
4. If not, repeat descale cycle first

Method 5: Reset Descale Light (K-Slim)

K-Slim uses different reset buttons.

1. Press and hold 8oz and 12oz buttons for 3 seconds
2. Or hold the K button for 5 seconds
3. Light should blink and turn off

Method 6: Reset Descale Light (K-Classic/K-Elite)

Older models may need this method.

1. Turn off machine
2. Hold down 8oz and 10oz buttons
3. Turn machine on while holding buttons
4. Continue holding for 5 seconds
5. Release buttons

Method 7: Use Stronger Descaling

Heavy buildup needs more treatment.

1. Use undiluted white vinegar instead of solution
2. Fill entire reservoir with vinegar
3. Run through completely
4. Let sit for 4 hours (or overnight)
5. Run 4+ reservoirs of fresh water

Method 8: Clean the Needle

Clogged needle triggers descale warning.

1. Turn off and unplug Keurig
2. Open and close K-cup holder
3. Use a paper clip to clear the needle
4. Use Keurig needle cleaning tool if available
5. Run several water-only cycles

Method 9: Clean Water Reservoir Sensors

Dirty sensors give false readings.

1. Remove water reservoir
2. Clean the magnet/sensor area on reservoir bottom
3. Clean corresponding area on machine
4. Use damp cloth – no soap
5. Reattach and try again

Method 10: Contact Keurig Support

If light still won’t turn off.

• Call Keurig at 1-866-901-2739
• Have model number ready
• They may have model-specific reset procedures
• May offer replacement if under warranty

FAQ

Can I ignore the descale light on Keurig?

You can use the machine, but mineral buildup will worsen, affecting taste and eventually damaging the machine. The light is a warning that maintenance is needed.

How often should I descale my Keurig?

Every 3-6 months depending on water hardness. If you have hard water, descale every 2-3 months. The machine will alert you when needed.

Can I use vinegar instead of Keurig descaling solution?

Yes, white vinegar works well. Use undiluted vinegar, run through, let sit 30 minutes, then rinse with 3-4 full reservoirs of water to remove vinegar taste.