Check the door balance by disconnecting the opener and manually lifting the door halfway; it must remain set up without the need of increasing or falling. Moreover, Test the operation of the remote and wall swap, changing batteries if essential. Newest openers have limit adjustment screws or electronic Regulate buttons. https://spencertnvzn.arwebo.com/60631735/5-tips-about-old-chamberlain-travel-limit-adjustment-old-liftmaster-travel-limit-adjustment-screw-drive-garage-door-opener-travel-limits-you-can-use-today