Replaces previous part number 8054389
The Reference Switch mounts on top of the operator powerhead in the rear where the belt or chain moves around sprocket. There are tabs attached to the belt and chain that tell the operator to stop running when they come in contact with the Reference Switch. If the operator continues to run and will not stop when it should then it's possible the reference switch is bad and needs replaced or the tab on the belt or chain has come off so be sure to check both.
Marantec opener replacement part for the following models:
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