"clean" light will not go out
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.
on Mar 05, 2010