Genuine LiftMaster K94-37806 reset switch with product ID resistor for the HCTDCU high-traffic overhead gate operator.
Fitment: LiftMaster HCTDCU and HCTDCUL high-traffic overhead gate operators.
The ID resistor tells the main control board which operator it is fitted to, so a plain reset switch will not work in its place.
Replace when the operator will not reset after an obstruction, or the board reports the wrong operator type.