20 Most Recent Mr. Coffee Classic 12-Cup Coffeemaker - Cocoa (MRX35) Questions & Answers

Inside is a heating element, most likely burnt out. Because that type of machine is self contained unit it is time to throw it out, mr coffee machines are dime a dozen these days. Can pick up another at wall mart for about 30 bucks. Not worth even attempting to fix or take apart a self contained factory machine . Sorry there is no good news, simple fix on that type of machine, unless you have warranty on it.

Mr. Coffee... | Answered on Mar 19, 2012

I found the missing vinyl washer.

Mr. Coffee... | Answered on Jan 23, 2011

In my experience with this coffeemaker, the Special Cleaning Cycle light doesn't illuminate until the machine is very clogged up. The risk of ignoring this indicator and waiting too long to clean it is that by the time it does get cleaned the calcium deposits will end up clogging the check valve, thereby shutting down at once. Regular cleaning will prevent significant amounts of calcification and thereby result in hotter, better tasting coffee and less risk that the loosened mineral deposits will end up clogging vital parts of the machine if and when you do clean it.
If you notice, the inside of the lid to the water tank states that the unit should be cleaned every 30 days. This is true whether you see the cleaning indicator light illuminated or not. To clean the coffeemaker, you must add 20 oz of undiluted white vinegar per the owner's manual, then press the "clean" button. If you do not recall the last time the coffeemaker was cleaned and wish to start off on the conservative side, you may wish to use a diluted solution of white vinegar (about 1/3 to 2/3 water).
The coffeemaker will brew part of the vinegar, then pause 30 minutes, then restart itself. Use clear water to rinse at least two times after the process completes. This will take about an hour in all. If you are in a hurry, you can just run vinegar through a regular "Brew Now" cycle; however, this will be somewhat less effective.
When adding fresh, cool water to rinse the vinegar out, make sure to allow a few minutes to cool down between rinses because the element is extremely hot. You may wish to use a vessel other than the carafe to fill the water tank while rinsing because it will take less time. Otherwise, the carafe may crack or shatter if you take it off the hot plate and fill it with cool water straight away.
Finally, I suggest you visit MRCOFFEE.com and put the model number in their web search box. The Classic Edition Coffeemaker came in three varieties: MRX33 (black), MRX35 (brown) and MRX36 (red). The instructions are otherwise identical in operation and features. There will be a link at the bottom of the description to the user manual. If the model number no longer appears on their site, use your favorite search engine and type "model + manual + PDF" or terms to that effect.

Mr. Coffee... | Answered on Mar 05, 2010

Unplug it and start all over with the clock.. I'm not sure if this will work or not.. but it seems to work when my tv looses its sound.. some kind of chip inside.. well, if that dont work,, I will look in to that model and see whats going on..

Mr. Coffee... | Answered on Aug 22, 2009

You can download the complete manual in English here:
MRX35 manual

Mr. Coffee... | Answered on Mar 02, 2009

3 beeps means plugged water line. Take off the bottom of the coffee maker with a small phillips head screwdriver. Use pliers (I used needle nose type) to remove the wire clamps holding on the silicone water tubes to the hot plate. In my case, the water line from the reservoir to the plate was clogged with something I couldn't see until I blew on the hose and it popped out, could have been scale, grounds etc Clean with vinegar. Back in service!

Mr. Coffee... | Answered on Jul 19, 2020

I see two problems that you've described.

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.

Mr. Coffee... | Answered on Jun 27, 2020

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