Question about DeLonghi ® Combi CoffeeEspresso Maker

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Coffee maker wont start

When i turn the machine on, the lights go on but nothing else happens? It is a delonghi model# bco-120t. do you know where i can find a wiring diagram?

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I had the exact same problem with my DeLonghi Caffe Verona Expresso Machine (very old) and I replaced the thermal fuse and works fine! I did call DeLonghi and the tech told me the Thermal Fuse is the most common problem of no power. (providing your unit is plugged in and the receptacle works) In my unit the fuse is on top (only one) and it did have a plastic sleeve over it. The fuse was bought at Radio Shack for 1.99 and I had to solder it on because I forgot to get the little crimp ends from the Radio Shack guy. oops If I can do it...anybody can. (55 year old Grandma)

Posted on Apr 08, 2011

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There are thermal fuses on the bottom. You must remove the bottom cover to see them under the heating tray. If the heating does not work the water will not heat and rise (no drip - nada). I posted some pics on my ebay store.

I am not a Coffee Machine technician, I am a computer technician who can troubleshoot to the electronic component level. I understand that some of my comments may not be correct so keep your negative comments to yourself. This worked for me on many Coffee Machines that I had to resell. Just sharing the love. Thank you.

WHERE ARE THE THERMAL FUSES: There are 2 thermal fuses under the coffe tray and 1 fuse under the espresso boiler. (YOU WILL HAVE TO REMOVE THE BOTTOM COVER OF THE MACHINE). What this fuse does is regulate the temperature of the heating element so that everything doesn't melt (yep, I tried to bypass the fuse and found out the hard way..testing...testing..). Anyway, replacement for these thermal fuses are sold at RADIO SHACK for about $2.00. (Yep, only $2.00) If you open the bottom cover of the coffee maker and you will see the 2 fuses, they look like resistors. they are covered in a plastic tube to prevent damage. Clip them off I used a small wrench(radio shack) to pry open the small clamps that hold them, replaced them, then reclamped the new fuse back on.
REPLACEMENT FUSES: The thermal fuses have the watts/Amps and temperature stamped on them. There is 1 part that I use and has been working well for over a year ( over a year, yes this machine can last a long time!!).
The part # is Labeled - Raido Shack 270-1321 Thermal Fuse 438°F (226°C) 250VAC 10A (For heating devices like coffee makers and hair dryers). The temperature may vary + - a few degrees° on the label, from what I have seen.

HOW TO TEST THERMAL FUSES: These fuses are not only used for temp control but they also close the curcuit. If the fuse blows then it is open and will not heat. I use my ohmeter (put 1 prong at each end of the fuse) and if it reads open it means that the thermal fuse is bad, it has blown, there is no current running through it. I believe a light meter can check for continuity also and are much cheaper. Test by putting the test leads at each end of the fuse (1 prong at each end).If the light turns on then you are good, getting continuity. If you cannot get no light then it is bad. You can test your light fuse with a simple wire, touch each end and the light should go on, cut the wire in the middle and no light!!easy.
fyi. If your coffee does not get hot enough the fuse may need to be replaced also.

Know that a reading of OL means "over limit." That means the resistance is off the charts, and you have a break in the circuit. If you got an OL reading for the plug wires, you'd know there was a broken wire that needs replacing. In this case, we got an OL reading because the light switch is in the "OFF" position.

Read more: How to Use an Ohmmeter '

Consider that a low reading, anywhere from 0 to .5, indicates very little to no resistance. This means there's a continuity of current in the circuit. This is the reading you should get

Read more: How to Use an Ohmmeter '

Posted on Sep 30, 2010

  • turks42 Mar 12, 2011

    This sounds like the right solution; problem is, there is some rather unusual hardware (think small hexhead, only with a pin protruding from the center) attaching the bottom plate to the unit, which clearly requires a specialized tool. Any ideas where to get one?



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