Craftsman 1/2 hp GDO remotes will not program
Model # 139.53964SRT GDO
remote # 139.53681B Gray with Blue buttons.
After replacing the batteries in the 2 remotes we have I went to re-program them useing the standard procedure via the manual.
1)press & hold the SRT button 6 seconds until the LED next to it goes out.
2)press & hold the remote door button
3)press & hold the light button on the door control
4)press & hold the door control push button
5)release all buttons after opener light flashes.
After doing this I press the remote for the door to go up and it goes up but will not go back down with the remote. The only functional/operational control is the wall control (in which the green LED will constantly blink) Even the remote keypad will not work. Also, the light button on the wall control unit will not turn on/off lights.
Thank you in advance for any help.