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Coffee maker RIVAL MODLE CM800

Will not make coffee does not heat at all. lights for no and off work clock & programmer OK

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  • SF_Mvandyke May 10, 2009

    Mr. Coffee ECM21 E & C Maker, 6 months old, used occasionally yet
    'mysteriously stops brewing on the "Coffee" side.

    Exterior Dials appear to work fine and light as they should, the Espresso side works fine, however, as I side above the coffee pot side neither brews nor does the plate heat. Opened it up to find a part attached
    to the plate with detachable wires EXTREMELY blackened, corroded or possibly shorted out. I have been hunting for a manual for two weeks to identify this component attached to the plate without any luck.



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Mine did this too, check for a hidden Zehner Diode. Mine came inline before the heating element. I thought it was the thermostat or the element but turned out that the diode failed and i was able to bypass it for a sec, and i mean literally a sec, and turn on the mach. Heating element heated right up, which is all i wanted to see. Looks like once i determine the value of the diode, i should be able to replace it and coffee maker will most likely be fine again. :) I think i can read the numbers, and it looks like 1250v 10A for mine, you should examine the casing of diode closely and you may find numbers on it.

Posted on Aug 17, 2009

  • Dj Williamson Aug 17, 2009

    Wrong value on Zener Diode. looks more like 10a 250V....hard to read LOL

  • Dj Williamson Aug 17, 2009

    May also be called the Thermal Fuse.


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Several possibilities:

  • bad thermostat
  • bad timer
  • bad element
You can check all the items except the timer (if electronic) by disassembling the unit and using a multimeter. The thermostat is a black button about 12 mm (1/2 inch) in diameter with two wires. The heater is usually part of a casting and has connectors on it. Also, cycle all connectors to defeat corrosion.

Posted on Jun 02, 2008


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Rival® 12-cup Coffee Maker FEATURES:
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  • Removable Filter Basket
  • Easy Pour, Non-drip Carafe with Ergonomic Handle
  • Water Level Indicator in Tank
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Coffee maker stoped working

  • Make sure the power supply is all rite (if not try with different socket)
  • If your able to seee light..then try re-programme it using buttons.
  • Still if you face same issue ..i request you to call technician.dont try any thing,Give it to safe hands
  • Thanks
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