Coffe does not stay hot in carafe

There are three things it could be, the motor that drives the brewing unit, the brewing unit itself or the pressure relief valve. You need to operate while looking inside with a torch to see what is happening. This is done with the back, the top and the beans side side cover removed for visibility.

unplug the coffee maker. Let the unit cool down for say a half hour. Try another pot of coffee and see if it comes on after plugging it back in of course

The two most common reasons for overflow or underflow have to do with the carafe lid and the filter basket - they key to smooth flow with this coffee maker is making sure the filter basket and carafe lid are making the proper contact with each other so that the center knob on the carafe lid pushes slightly up on the filter basket spring. Make sure the carafe lid is completely closed. Make sure the filter basket is pushed all the way down. Make sure you are not using the gold tone filter and a paper filter at the same time. For some reason, I get better results when the handle of the carafe is resting against the right side wall. If everything is in place, I would suspect a problem with either the filter basket being clogged or some problem with the carafe lid - call Cuisinart as they should be able to order these parts for you.

What are the simptoms? Once you pour the water and add the coffee it should start when you press the coffee button.

OH Yeah!
That is the number one failure in these machines. (owned four of them)
The problem is one or both of the "twin" thermal fuses or the thermostat for water
heating and hotplate,( one in the same) has gone open. I have tried for a long time to locate correct replacement parts to no avail. I would STRONGLY not recommend trying to bypass as these are not only controls but a safety feature as well. I was lucky a wile back and found one without a carafe at a garage sale. used it for parts, now those have failed also. Really miss them. If I ever find a source for parts I will post it here with replacement procedure.

EfACTOR

probably need to descale the machine scale stay on the heater and doesnt heat as much use descaler not vinegar thanks pierre

Just found the answer!


The type 453 coffee maker offers a carafe ‘pre-warm’ function.
This feature will heat the carafe for 5-10 minutes before the brewing process begins and is indicated by a flashing red light.
To toggle this feature, push the top-right button in the control panel until the display reads "off".

Hmm. Better late than never. Just got home with ours. Same problem. Called Cuisinart 800 number. Catch is on top of handle. There is a slight lip on each side there. Pop it up with pressure on both sides simultaneously. To replace, line up lid carefully with top of carafe and press firmly until it pops back on.

I just had the same failure, but fortunately, had already bought a used 10-cup unit a few months back as a spare.

The component in question is a thermal circuit breaker, of the sort which does not reset. Once activated, it is destroyed,  

I have been unsuccessful locating the same component on the internet, but it seems to be a very high temperature unit, with the nomenclature "Tf 318 C" which because of the lower case "f", leads me to conclude that it's designed to trip at 318 degrees, C, or a very healthy 604 degrees, F.

Similar fuses in other appliances range around 230 degrees C (446 degrees F),  which is in the ballpark.

The failure is easy to verify.  If blown, there will be powdery white residue on the inside of the bottom plastic cover near the part.  Also, an ohmeter will show an open circuit across the contacts.  (Unplug the unit before measuring!)

Screws to remove the bottom cover are three tamper resistant torx screws.  

If I am unable to find an exact replacement, I will use a thermal fuse in the same power and temperature range (10 Amps, 300 degrees C trip).

Because my unit unequivocably did not experience over temperature conditions, I suspect this is a component aging issue and that there is no other problem with the coffee maker.

Supporting this is the fact that the unit works fine after I moved the good part from my spare coffeemaker to the dead one.  

Leave the carafe off the hot plate and place the basket in holder with the lip under hinged flange so it sits flat. Then replace the carafe and the basket should not move up when the Pause and Serve button opens. I just bought this pot too and
love it but except for the basket placement problem.