Question about Cuisinart SPB-7 SmartPower Work Top Blender

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Cusinert blender lights blink wont turn on Changed thermal fuse with Radio Shack 10 amps fuse, no change...lights blink, but motor won't turn. Product: Qusinart SPB-7BK

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I had the same problem and I manaed to fix my Cuisinart SmartPower Duet blender. There are two thermal fuses, one tape attached to each stator winding. Both of mine were blown.

In addition, when the fuses blew, it must have spiked the triac. I had to replace mine. It's the black 3-legged transistor looking device with a small metal heatsink attached to it. This gizmo directly throttles the power to the motor under control of the microprocessor. There are some guides on the internet on how to test it.

Also, the clutch was very hard to remove and needs to be removed to more easily replace the thermal fuses. I clamped down the end of the motor shaft to a bench vise real hard and then I used a 7/8-inch open-end wrench to wedge into the clutch prongs which made it much easier to apply torque. Remember that its screw threads are reversed from normal screws so that it does not unscrew during operation. You have to turn it counter-clockwise to unthread it.

Hope that helps!

-Vince

Posted on Oct 01, 2008

  • Brian Friess
    Brian Friess Nov 09, 2011

    I completely disassembled my SPB-7, trying to find the "thermal fuse taped to the coils" but wasn't able to find it. Can you give me a link to a picture of what I'm looking for? I think it may have blown a fuse, but I don't know how to find what you're describing.

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Do the lights come on but the motor won't come on? I had the same issue with my Cuisinart blender.

The problem is very often a thermal fuse. It protects the motor by opening the circuit if there is too much current or if the motor is overheating. If indeed this is the issue with yours, the device is less than $2 each is sold at Radio Shack but finding someone to replace it for you might be hard. On my motor there were two thermal fuses taped onto each stator winding. It took about 1-1/2 hours of work to remove and rework because of the unusual location.

Another part that often blows is the triac that controls the motor. This is around $4 but again, it's finding someone who can replace it with the correct replacement.

Hope that helps,

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