Ok I located some information on your unit.

first of all it has a 7 year parts and service warrenty. If the unit may be within this warrenty period please call 1(NNN) NNN-NNNNfor information about a free service call to repair the unit.

If it is not under the warrenty period then you should first look under the counter and locate a part that slips around the top collar of the unit. This is a magnetic pick up that detects the magnets in the switsh/stopper. If it has slipped then you need to place it back in position. This should fix the problem. If that is not the problem then you will need to call the same number as above to determine where the nearest service and parts store is located in your area.

Once you have this information give them a call and tell them that the magnetic pickup of your unit has failed. They will arrange for you to purchase the new part.

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Best regards, XXXXX XXXXX Smithy