17Programming Transmitter to Power Head UnitNote: Do not press any button on the Transmitter until instructed1. Press the PROGRAM Switch button located on the garage doorpower head unit once. The red PROGRAM STATUS light on themotor power head unit and overhead lamp will turn on andremain lit for one minute, indicating that it is ready to learn theTransmitter.2. Press the button on the Transmitter you wish to use to operatethe door. The PROGRAM STATUS light on the power head willturn on and off three times indicating a successful learn.3. Press the same button on the Transmitter once more to confirmoperation. The opener will turn on and move the door.At this point you will be able to activate the opener.Battery: If the LED (light) on Transmitter is dim or does not turnon, or the opener does not respond when a button is pressed,repeat “changing the transmitter code” operation or replace thebattery. To replace battery, insert a coin in the coin slot and twistcoin to access battery compartment. Some transmitters use twoCR2016 or equivalent batteries while others use a single MN21 orequivalent battery. Snap case together after replacing.Reprogramming to the Power Head Unit may be necessary.Step 23a: Two Button Transmitter Security Code Change and ProgrammingAvailable only for 303/372 MHz combo models.Note: The following steps describe the process to change the Transmitter security code and to program theTransmitter.IMPORTANT: You MUST change the Transmitter security code prior toprogramming the device to the power head unit.WARNING: During programming the garage door mayoperate. Keep people and objects clear of the moving door toprevent door damage or possible personal injury.Changing the Transmitter Code1. Press and hold the button on the transmitter that you want to change(left button or right button). The GREEN LED (light) will flash once andthen turn off.2. Continue to hold the button until the GREEN LED begins to flash(approx. 10 seconds).3. When the GREEN LED flashes, immediately release the button andthen immediately press and hold the same button again. The GREENLED will now come on steady.4. Continue to hold the button until the GREEN LED begins to flash (approx. 5 seconds).5. When the GREEN LED flashes, immediately release the button.6. The code for this button has now been changed to a new randomly generated code. Do not press the buttonagain until instructed in “Programming Transmitter to Motor Head Power Unit”.7. You must now re-program this transmitter to the motor head unit. See “Programming Transmitter to Motor HeadUnit” above.Note: After the transmitter is programmed, see “Programming Transmitter to Power Head Unit” above. Aftercompleting “Programming Transmitter to Power Head Unit” proceed to step 24.