20 Most Recent Cuisinart CHW-12 12-Cup Coffee Maker - Page 8 Questions & Answers

Take it back must be in warranty.

In an empty machine,(no coffee, no filter), pour in a 50-50 mixture of water and white vinegar. Allow the machine to start brewing and when a cup or so has run through, stop the brewing process and let it sit for an hour or two. This should dissolve some of calcium buildup in the machine and allow it to complete a full cycle. May have to do this a couple of times to fully clean out the mineral buildup. After cleaning, run a pot of clear water through to rinse out the remaining vinegar.

Need sevice the Machine

Try leaving the device unplugged for 30 minutes before trying again. In older Cuisanart coffee makers it took that long before the internal computer would reset itself when electrical power is reapplied. If the problem persists and you have verified the controls are set properly then likely the heater circuit control has failed.