Garage door openers are coded to send out the same fixed code each time. They features 9 binary coding switches to set your code. There are 2 dip switches each of which can be placed in two different positions ( up/down ). The receiver and all the remotes must match. This enables you to use as many remotes as you want. Programming instructions are included with your order.
Set the nine-digit toggle code switch to match the code set from another functioning transmitter. Access to the remote toggle code switch is achieved by removal of the back cover and battery (if necessary). Move switches using a small pointed object, such as a paper clip, gently switching the small switches to either the ON or OFF position. If your original transmitter had punch-out keys instead of switches, then set the switches in your new transmitter to the OFF position for the keys that were punched out.
The Replacement Remotes Below Replace The Following Discontinued 9 Switch Models
AT-85, AT85A, AT85P, MAT85-BL, GT912
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