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First, you have a bad empty-reservoir sensor. Mine went out on my first Mr. Coffee within the first month also. The purpose of the sensor is to trigger the beeping to simply let you know when the coffee is done. The coffeemaker would normally work fine otherwise.
Second, you have a bad heating element. This is the core function of your coffeemaker and renders it useless for anything but a nice warming plate.
I recommend replacing the coffeemaker.
In the future, make sure you do not add water to the reservoir unless the coffeemaker has been turned of for at least five minutes. This will help prolong the life of the heating element.
The heating element will naturally degrade over time. But, it can incur sudden damage when the reservoir is refilled with water too soon - while the element is still hot. Because of the simple design, if the coffeemaker is on, then both the warming plate's heating element and the reservoir's heating element are on. So, after a brewing cycle is complete, the reservoir's heating element stays on. Without any in the reservoir to keep it cool, the heating element superheats. So, if water is put in the reservoir while the coffeemaker is on or before the element has adequately cooled, the sudden burst of steam from the water contacting the element can be quite violent.
I presume you are requesting instructions for cleaning this coffeemaker...
With the coffeemaker off (either a red blinking light or no light on), pour four cups of pure white vinegar (no water added) into the reservoir. Remove any filters, but leave the strainer basket in place. Tap the "select" button three times until the red light is on (and stays on, not blinking). The cleaning cycle now begins. It should take between 45 minutes and an hour to complete. Don't be concerned about the 30-minute long pause during the cycle when nothing happens. This is intentional and part of the cycle.
After the cleaning cycle has completed, get rid of the vinegar. Rinse out the strainer basket and the coffee pot. Run a full pot of clean water thru a regular brew cycle (with the pot and basket in place, of course). Then, dump the water, rinse the pot and basket again, and run another full pot of clean water thru a regular brew cycle. Dump that water too. And, you're done!
In the manual that came with the coffee maker, the beeping is the freshness alert. When coffee is finished brewing it beeps 5 times. Every 15 minutes it beeps to let you know your coffee is 15 minutes less fresh! I just purchased this coffee maker and was looking on here how to dis-assemble the beeper. Whomever came up with the "freshness beeper" on a coffee pot needs a new job! Usually when I make coffee the whole house is asleep, now the beeping is waking everyone up! Very frustrated with this coffee pot!
Let a half caraffe worth of distilled white vinegar sit in the water reservoir for about an hour. After the hour, turn the coffeemaker on and let it brew the vinegar until a small amount of vinegar appears in the caraffe. turn the coffeemaker off and let it sit for an additional 20 minutes. Then turn the coffeemaker back on and let it brew the rest of the vinegar. Then run a full caraffe of plain water to flush the vinegar out. If the self-clean light remians on - unplug the coffeemaker for 20 minutes or longer - if you unplug it for any less than 15 minutes, the coffeemaker will not reset itself. You should be good after that - as long as you do some sort of vinegar/water cleaning once a month henceforth.
Cuisinart Coffeemaker Decalcification Process Run 2 cups distilled white vinegar and 2 cups water through the system - brew it like it was regular coffee. Then run plain water through the coffemaker to rinse the vinegar out and make sure the decalcification was successful. Repeat as needed. Don't forget to remove the charcoal water filters first. -Tha Mp3 Doctor