A: Yes. They are required to keep the door counterbalance cables in the grooves of the cable drums. Should the door encounter an obstruction, they will prevent the cables from unspooling.

A: The operating frequency is 372 MHz.

A: No. It can be installed at any point along the tube above the garage door, provided there is enough disconnect cable to hang at least six feet off the ground on the right side.

A: The opener comes with a 6 ft. power cord.

A: The normal range of wireless accessories is 75 ft. To maximize this range, fully expose the antenna, and make sure it is completely vertical. To fasten the antenna to the wall, use tape as opposed to metallic fasteners.

A: The garage door should be no more than 8 ft. high.

A: The garage door must be less than 225 lbs.

A: There is no garage door width limitation.

A: The detent pin adjusts the timing of the motor head pivot to the movement of the door. While the garage door is opening, the motor pivots up and the pin goes into the motor bushing to hold it in place. While the garage door is closing, the pin slowly moves out to the left as the door is released. When the door is completely closed, the pin is out of the bushing, releasing the motor. Only make adjustments on a properly balanced door.

A: If you run the garage door opener more than eight cycles in five minutes or for 6-8 consecutive cycles, the motor will shut down to prevent overheating. Recovery time is five minutes.

A: No. Programming should not be lost if your power goes out.