#8 Liftmaster 41A6104 Cable tension monitor

The LiftMaster 41A6104 Cable Tension Monitor is a replacement part for use with the LiftMaster 3800 Garage Door Opener. The opener comes standard with a cable tension monitor. The garage door cable tensioner is used to monitor the cables for any slack. If excessive slack is detected, the door will reverse. This helps eliminate service calls and keep the garage door opener working properly. The cable tension monitor must be connected correctly and working properly before the garage door opener will operate in the down direction.

The replacement parts for LiftMaster 3800 Garage Door Openers can be installed without removing the opener from the wall. The simple replacement is necessary when the LED light on the operator flashes 9 times and reverses the garage door when no obstructions are present. Before replacing, ensure the Cable Tension Monitor is correctly connected to the garage door operator. If no obstructions are present and all connections are secure, a replacement Cable Tension Monitor should be installed. Cable Tension Monitors ordered through North Shore Commercial Door usually ship the next business day for fast repair.

• Model 41A6104
• Compatible with LiftMaster 3800 Garage Door Openers