1 The second rectangle has a length of 16 centimeter (6.3 in) and a width of 8 centimeter (3.1 in). 2  Find the linear scale factor between the two shapes. 3  The length of the smaller rectangle corresponds to the length of the larger rectangle. 4  The length of the smaller rectangle equals 4 centimeter (1.6 in).
Reset the Keypad. The Smart or Learn button on the motorized unit attached to the garage ceiling resets the keypad and the control unit that operate the garage door opener's motor. You'll need to enter a new code into the keypad to make it operational again and reprogram the control unit.o verify that the reset took, enter the old PIN code into the keypad to see if it opens the garage door. If it does, the reset didn't take. Repeat the step to reset the keypad and verify the old code doesn't work before proceeding.
Tip. Before buying a new remote to work with your garage door opener in the event you lost one, verify that it will work with the model of garage door opener you have. Some universal remotes come with a dial that you set to match your garage door opener model.f your garage door fails to operate, unplug the unit for at least 1 minute and up to 5 minutes, depending on the model you have, to allow it to complete a power reset. After the allotted time has passed, plug the opener back into the power outlet.