Genuine LiftMaster 50-13529 sectional door interlock switch, also known as 50450 for the Maxum industrial DC operators.
Fitment: LiftMaster Maxum JDC, RJDC, JHDC and TDC industrial DC operators.
Also sold as 50450. Rolling doors take the 50-12949.
Ordering the right part depends on the full model number, which is printed on the operator label. Call GateHouse Supplies if you are not sure — we service these units every day.
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