A couple of people on here mentioned he filtration system, or charcoal filter that is in the
water resovoir as being problematic. We removed it. This morning the pot brewed entirely.
Not sure how that all is inter-connected, but it worked.
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Before you take anything apart, which I came close to doing, take a toothbrush to the metal pins/spouts. After running I don't know how many cups of vinegar and letting it sit, it still wouldn't brew more than two ounces. I was going to attempt a fix found on the internet, and I thought, what the heck -- can't hurt. So I took out a new toothbrush and brushed both pins (didn't have to remove anything) and voila! Out came some grounds in a cup of water and it brews the full amount of whatever oz. I choose. Works great, normal and I didn't have to disassemble anything.
I haven't solved the problem, but I continue to disassemble my K30. Most likely points of failure for the blue start light not coming on appear to be a sensor to detect the cup is in place (two small holes on the left/right front edge of the cup holder) or a sensor in the resovoir lid where the blue pin presses on a pressure switch. I did find that the red wire to this switch gets caught in the lid hinge and may be damaged. I will post more if I finally discover the root cause but may just go to Bed Bath & Beyond and buy the resovoir model with a 2 year warranty. Lesson learned. Cheap switches and mechanical devices.
mcdevito75 here, Your Mr. Coffee may need cleaning, here"s how, Fill the resovoir with white vinegar, cycle thru the machine 3 times, half way thru the 3rd time stop 1/2 way thru and turn off machine for 30 minutes, then recycle. After that rinse your Mr, Coffeee by cycleing thru fresh water each cycle takes another resovoir of fresh water to get rid of the vinegar. If this is not the problem, maybe the pump is shot. Contact Mr. Coffee by phone or online at Mr. Coffee.com or replace the machine.
I replaced my broken carafe on model: 169164 by purchasing a RIVAL 12 cup coffee maker PIL-HC08104 from WalMart for $10.24 and simply put my black handles on the new pot whaic had white handles. The pot appear to be exactly the same.
Mine just started to do the exact same thing. So I decided to clean it using the "Clean" program and just water. I put the brewer through the cleaning program 3 times - each time it would brew water from 12 cups to 8 cups, I'd tap the brewer on the countertop, it would brew from 8 cups to 4 cups, tap it again, and it would brew the remaining cups. So, I called the Mr. Coffee help line (800-672-6333). The most-likely problem is that the hose is no longer attached in the water reservoir. The help line suggested that I take it in to a service center. I live in Urbana, IL and the closest service center is in Oak Lawn, IL - 2 hours away from me!!
Here is my solution:
1) Buy another coffee brewer.
2) Smash your current Mr. Coffee brewer into a million pieces (this relieves stress) and go buy another coffee brewer (probably stay away from Mr. Coffee products).
Hope this helps.
Frustrated in Urbana
It's probably time for a good cleaning. Follow the procedure in the manual, or get some commercially available coffee maker cleaner. When the minerals build up enough, the water flow and heating is reduced enough to keep it all from passing through.
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This information is for the GE model number 169164 12 cup digital coffee maker. The Micro fuse is shorted open. There are two underneath the housing. They are made by MICROTEMP® and are the G400 series rated at 216 Degrees Centigrade.
You can check these with a Ohm meter to see if you have continuity. Checking across the leads of each one they should show infinity. If not you've identified the bad one. You can pick up a new thermal fuse at Radio Shack. The closest one to the specs of the Microtemp is a Radio Shack part number 270-1321 rated at 228 Degrees Centigrade. Before removing the old one notice which way the hat end faces. Use a heat sink when soldering the new thermal fuse in place by using alligator clips or a pair of pliers.Reassemble and your back in business as a Barista.
Note: There are four Phillips head screws under the rubber pads. The three unusual screw heads may be removed/installed with a small screwdriver installed in just one of the slots.