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Steve Overly Posted on Jul 29, 2018

Bunn my cafe mcu red light flashing. Water does not heat. Water will run out if brew button pushed, but of course it is cold

2 Answers

Brian Short

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  • Posted on Nov 12, 2021
Brian Short
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My Bunn MyCafe MCU had this same problem. You have a failed thermostat limit switch. It's an easy and inexpensive repair. The Thermostat limit switch prevents the machine from heating when it fails. Bunn part no. 29329-1000. I bought mine from amazon for 8 bucks. Unplug and drain it into your sink, remove the screws on the top, back and sides. Mind you there are some hidden under the rubber feet and one in the vent thing on the top of the back. Put those screws in a cup, you'll need them all. Wiggle the bottom and back covers off and you'll see the stainless steel reservoir. On the reservoir you'll see the round thermostat limit switch with 2 wires going to it. You'll need to pull the wires off the switch they will be tight - don't pull by the wire! carefully wiggle them off by pulling on their metal clips. I used a pair of pliers. Once the wires are off, carefully pry up on the metal spring clip that holds the switch to the reservoir. Again, you'll need to be gentle. The switch will fall out. Install your new one, its not directional. Just get it under the spring clip again and put those wires back on. Make sure they're secure. Take your time. have fun finding out where all the screws went again. I think they're all the same. Fill it with water, plug it in and let it warm up.

Lillian Ingster

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  • Posted on Aug 26, 2021
Lillian Ingster
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I have the identical problem, and I noticed it this morning after there were 2 very brief (seconds) power outages the previous night. Reading around the internet I read that the fuses inside the unit are the likely culprit, and need to be replaced. You can buy fuses made by others, for this unit. But not from Bunn. And there are video instructions around that show how to do it. The fuses are crimped on, not soldered. Mind you, I haven't tried to do this, yet, but that's what I read. Good luck!

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Anonymous

  • 1 Answer
  • Posted on Dec 08, 2007

SOURCE: Home Cafe GT300 Black and Decker- won't work, brand new

I have the GT300, and it also started having problems with the 14oz and cream loight s blinking. After trying the unplug and replug thing I gave up, I came back to it the next day and it started working again so I just kept running it over and over until I got it to fail again when I opened the lid and put a pod in to make a cup of coffee. It wouldn't work again so I unplugged it and set it back up and held my hand on the lid and applied a little pressure and it started working again, so far with a little preesure applied it still works. My guess is there is a switch that dosen't make as well as it should, you don't have to hold the lid down during the entire brewing cycle just long enough for it to get started. Good Luck

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Anonymous

  • 1 Answer
  • Posted on Jul 20, 2010

SOURCE: I have a Talea Giro and the red alarm light keeps

Checklist:

  • Water tank full
  • Remove dregdraw for at least 10 seconds then re-insert
  • Beans in hopper
  • Beans lid correctly inserted
  • Steam knob Exactly in off position

Anonymous

  • 36 Answers
  • Posted on Mar 30, 2011

SOURCE: I push the start button (the one with the red

Sounds like there an issue with the heating element. When the element goes bad it wont pull any water from the tank nor will it heat the water sending it up through the shower head and onto the beans. Unfortunately, since Braun has discontinued ALL kitchen appliances here in the US many of the parts are obsolete including the heating element for this machine.

Anonymous

  • 10319 Answers
  • Posted on Jun 05, 2011

SOURCE: We have model b80 that will not brew. Water

add a cup of distilled vinegar and let stand overnight then try it in the morning to descale

Anonymous

  • 4323 Answers
  • Posted on Jul 02, 2011

SOURCE: Found cycle not finished, water

Hi

First make sure that nothing is blocking the drain pump assembly located inside the lower front panel of the dishwasher. If the issue returns after its cleaned then it means that the control board has gone bad and should be replaced. Hope this helps...please post back for further assistance.

Daniel

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Related Questions:

0helpful
1answer

I just plugged in and put water in the top resevoir of my Bunn coffee maker, Model MCU. The The red square is flashing. How long does it take until it is green and ready to brew?

Should be about 8-15 mins depending how cold the water was. Here are the instructions: Aloha! ukeboy57

http://www.bunn.com/sites/default/files/care-and-cleaning/43460_0002d_mycafe_use_care_manual_english_0.pdf
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Bunn coffee maker leaks

VPR has a semi-sealed tank that keeps +1 pot of water heated and ready to brew. Pouring in a full pot of cold water will fill the top tray and allow a slow trickle of cold water into the top which forces hot water to over flow into the brew basket. This continues until all the cold water drains into the heater tank. So the brew is matched volume per volume. UNLESS the tank was empty or not filled prior to brewing. Follow the brewing instructions from Bunn (on line for *FREE* download at Bunn.com)
* If it leaks (from the bottom) only when you pour in water. Then your pouring it too fast and over flowing the fill tray. slowdown, watch the level in the tray. do not fill past the lid.
* If it leaks just sitting (not brewing) then there is a hole in the tank. Call for service.
* If it leaks after filling the tray half way. then the top of the tank has a leak, loose, cracked, or missing gasket. There is quite a few gaskets on the lid. Call for service.
* Final; Leaks are always bad around electrical equip. Best to unplug and call for service to be safe.
Aloha, ukeboy57
0helpful
1answer

How do I fix my bunn #053213cs from leaking from the bottom

VPR has a semi-sealed tank that keeps +1 pot of water heated and ready to brew. Pouring in a full pot of cold water will fill the top tray and allow a slow trickle of cold water into the top which forces hot water to over flow into the brew basket. This continues until all the cold water drains into the heater tank. So the brew is matched volume per volume. UNLESS the tank was empty or not filled prior to brewing. Follow the brewing instructions from Bunn (on line for *FREE* download at Bunn.com)
* If it leaks (from the bottom) only when you pour in water. Then your pouring it too fast and over flowing the fill tray. slowdown, watch the level in the tray. do not fill past the lid.
* If it leaks just sitting (not brewing) then there is a hole in the tank. Call for service.
* If it leaks after filling the tray half way. then the top of the tank has a leak, loose, cracked, or missing gasket. There is quite a few gaskets on the lid. Call for service.
* Final; Leaks are always bad around electrical equip. Best to unplug and call for service to be safe.
Aloha, ukeboy57
0helpful
1answer

When running brew rite through you coffee maker does the water need to be cold

Cold is better because it will cause the heating element to activate which will increase the effectiveness of the brew rite.
1helpful
1answer

BUNN MY CAFE BAD TAST WITH COFFE OR HOT COCO

Try really cleaning the basket that the water and coffee or cocao goes into. If you don't really clean it well, it will have the taste of the last thing brewed mixed in with the new brew. Coffee followed by coffee should not be a problem, but coffee followed by cocao will give the cocao a coffee taste, and visa versa.
0helpful
1answer

Delonghi EC850 coffe mashine red light are flashing

I have a Delonghi Figaro and the red led flashing means:

The unit has run enough times to likely be scaled, this is a reminder to run weak acid (vinegar or citric acid) through to descale. Then rinse twice with clean water.

Scale will slow the brewing process so if it's brewing slowly you should do this regardless of the LED.

The LED can be reset by pushing <Prog.> and <On.> at the same time.

Of course, none of this is in the manual.
0helpful
2answers

When i make coffee sometimes the water that comes out is cold or luke warm

The brewer has not had enough time to reach its operating temp (usually 7 mins after a brew cycle). If that is not hte case then the machine needs to be descaled.
7helpful
2answers

My tim hortons coffee maker is not brewing as quickly..s there a wayto clean it

Make a 1/2 pot 50/50 mixture of cold water and white vinegar then run it through the machine in normal brewing fashion. Place a clean filter in the brewing cup to catch the white deposits that are removed. Allow the mixture to cool, then repeat the process several times while using the same filter. Finally, run several pots of fresh water through to work out the taste of the vinegar. Repeat whenever the brewing time seems to be excessive.
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Bunn coffee maker

It sounds like you have a pour over model and the problem is the tank isn't full. Turn the machine off (or unplug it). Put a pot on the warmer like you are going to brew coffee. Pour clean cold water into the top until it starts coming out the sprayhead (above where the coffee grounds go). Now plug it in and turn on. Let it heat up then you can brew.

The way your machine works is that there is always about 2-1/2 pots of water in the tank. The water you pour in to make coffee is actually pushing the hot water in the tank out. So, if you don't fill the tank before using it, you may be hurting the heating element since it isn't totally submerged in water.
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