Display shows “CLEAN” and unit beeps; brew cycle may not start or stops early until cleaning is performed.

Safety first: Unplug the coffee maker and let it cool completely before handling any internal parts.

This indicator is usually a maintenance reminder, not a failure, but heavy scale can cause overheating and flow issues.

• Run a descaling cycle:
  • Fill the water reservoir with a 1:1 mixture of white vinegar and water up to the MAX line.
  • Place an empty carafe on the warming plate and ensure the filter basket is empty.
  • Plug in the unit, power it on, and start a brew cycle. If your model has a dedicated CLEAN button, press and hold it as per the manual to start the cleaning cycle.
  • Allow the unit to run until about half the reservoir is empty, then press STOP and let it sit for 30 minutes to dissolve scale.
  • Restart and complete the cycle.
• Rinse thoroughly:
  • Discard the vinegar solution and run 2–3 full cycles with fresh water only to remove odor and residue.
• Clean the drip valve and basket:
  • Remove the brew basket and wash it with warm soapy water.
  • Inspect the spring-loaded drip-stop valve under the basket; press it several times under running water to clear coffee oils and debris.
• Reset the CLEAN indicator:
  • On most Mr. Coffee models, the CLEAN light turns off automatically after a full cleaning cycle. If not, unplug the unit for 5 minutes, then plug back in.

If the CLEAN message returns immediately after proper descaling, internal scale may be severe and professional service is recommended.