A common fault in motorized kitchen appliances is failure of the speed control Triac and/or associated Diac. This teardown shows you how to get to and replace the Triac and Diac in a Sunbeam food processor.
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Sunbeam Food Processor Triac Replacement
Repairing a faulty speed control.
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Steps
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Step #1:
- The Sunbeam food processor. When plugged into the wall it starts at full speed, and the speed control dial can't turn it off or adjust the speed.
- This is a common mode of failure when a speed control Triac has gone short circuit, or failed partially, becoming easily triggered. This usually happens after a voltage spike from an inductive load, like the motor in the appliance, or something else plugged in nearby.
- Do not under any circumstances dismantle the unit with power applied, as it is double insulated and you could be electrocuted and a residual current earth leakage device will probably not be able to trip to save you.
- If you are not confident with mains wiring, get someone who is to do this repair for you.
