Question about Mr. Coffee MRCTB Coffee Maker

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I have a Mr Coffee MRCTB and it does not work

The coffee maker is not working and I do not have any repair or user manuals. After pouring the water in there it just sits there and does nothing

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  • sherylj45 Sep 28, 2008

    I kept adding water until I put in a pot and it finally started brewing. But it is leaking from the bottom.



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You don't. It stays in there inside the heating tank. When you put in cold water, it pushes out the already-hot water. Every year or so, you need to clean it out, or have someone do it for you. I just cleaned about a half inch of gunk out of one we have had at the fire station for about 10 years. Never knew we were supposed to clean it out...yuk. Tastes better now. Clean as a whistle! Also had to replace an overheat safety switch, $8.00 on-line.

Posted on Jan 06, 2010

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  • Frank Jan 18, 2012

    We have the same problem here with the safety switch. I tried to search for it on line but could not find it. Where did you find yours?

  • Kipp Sep 25, 2012

    How did you clean it? Did you remove the back cover? Of course it says "no user servicable parts" but that is probably to support their service centers. Please let me know. Thank you

  • Kipp Sep 25, 2012

    How did you clean it? Did you remove the back cover? Of course it says "no user servicable parts" but that is probably to support their service centers. Please let me know. Thank you.


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I believe this maker works of the simple act of water in and water out. Reservoir holds about 2 pots worth of water to stay warm. Once water is poured in the hot water will be pushed out. You need to make sure the reservoir is full, once full initial warm up is around 5 minutes or so, thermostat will cycle the element to its set temp. Fill your pot - pour - put empty pot under fast or you will make a mess very fast because it doesn't take long for the water to pour out.. good luck

Posted on Feb 28, 2015

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Okay, question. It does take quite a bit of water to get it ging. But, when you are all finished using it how do you get the extra water out of it?

Posted on Nov 05, 2008

Stupid question, but did you pour enough water in? It took a LOT of water before it finally started brewing.

Posted on Apr 26, 2008

I have one also. I just traced it down to a bad thermostat control. I have yet to figure out how to replace the thermostat. The problem is the thermostat stops heating the water before the water gets hot enough to be ejected over the coffee grounds.

Posted on Sep 16, 2007

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Sounds like there are a couple of problems -

First, are you certain that the coffee basket is clean? If the coffee basket has a valve on the bottom that allows you to remove the carafe to pour a cup of coffee, make sure the valve is clean. Being dirty would cause it to trickle coffee slowly into the carafe, and will hold coffee in the basket too long.

2nd, you may need to flush the water heating system as they can become corroded with precipitated solids from the water.
To do this, mix 1 part vinegar to 2 parts water in the carafe. Pour into the coffee maker and tell it to make coffee. Do this a couple of times, using a fresh mix of vinegar and water each time. Pour the used mixture down the drain.
When you feel it is clean, follow it up with a fresh pot of water. Then wash and rinse the carafe.

The coffee maker is now ready for it's next use.

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