How do I change the key code in a Genie 35674R Garage Door Opener UNIVERSAL "Wired" Keypad KEP-1 ?

I bought a new keypad and 2 VISOR remote (30498). As to programming garage door opener, I did like here:
programming garage door opener
- it tooks me 20 minutes and works great

Most of the time, keypads and remotes are not compatible with other manufacturers. You would be better off getting a universal keypad, which should work. Double check the older opener to make sure it is on the list of compatible devices.

Also, make sure you check the balance of your garage door periodically to make sure your springs are counter-balancing the garage door properly. If not, the lifespan of the garage door opener will be substantially shortened. Click here for a how-to video.

It's really easy to reprogram your unit:
Step 1. Hold down the (*) and the (#) keys until the keypad stops flashing.

Step 2. Determine your opener ID using the list below:

*1= linear garage door openers manufactured from 1997 to
present.

*2= Chamberlin, Sears, Craftsman, LiftMaster, Master
Mechanic and Do it garage door openers manufactured from
1997 to 2004 ( Orange learn Button)

*3= Same as *2 above, but manufactured from 2005 to present
with a (Purple learn Button)

*4= Same as *2 above, but manufactured from 1993 to 1996
with a (Green learn Button)

*5= Genie Intellicode and Overhead Door garage door openers
manufactured from 2005 to present (315 MHz).

*6= Same as *5 above but manufactured from 1995 to present
(390 MHz).

*7= Stanley garage door openers manufactured in 1998 to
present.

*9= Wayne Dalton garage door openers manufactured
in 1999 to present.

Openers with learn Buttons

Programming: Enter the PIN that you want to use, remember
(4) digits only. then press #

Enter ID # from list above, for example 2 then #

Press and release the Learn button on your
garage door opener.

Enter your (4) digit PIN and press (0),
for Genie and Overhead door units press
(0) twice. To test and use wait for light to go out
on keypad, Enter you PIN and press (0).
Note: If opener doesn't function repeat programming.

From: [email protected] for further
Instructions if required.

No each manufacturer uses a different code that is built into the keypad.

How do I connect KLIK2 to a linear with a learn button

Yes

They will not work together. You need to get the keyless entry for your chamberlain garage door opener. Or got a wired system gd-1 from Domino

Yes, you purchased the wrong wireless. You must get a Genie keyless and there are two types of Genie keyless (GWKP & GWK-BL) depending on which Genie operator you have. You might think about a wired keyless entry (Domino GD-1). Then if you change your operator you don't have to change your keyless.

If you are sure the battery is good than it sound like the keypad is bad and needs to be replaced. With a 6+ year old operator I would suggest a wired keyless entry (Donino GD-1) so if the operator has to be replaced you can use the same keyless entry.

Homelink Garage Door Opener Programming Procedure:

The procedure described below was successfully applied to a 2005 Jaguar S-Type.

To begin with, several attempts were made using the programming instructions contained in my Jaguar’s owner’s manual. Though the procedure described in the owner’s manual was straight-forward and understandable, I was unsuccessful in getting the vehicle’s remote to make my garage door opener function. The particular garage door openers I have are both made by Genie. Both openers utilize the “Rolling Code” feature.

To begin with, be sure to clear previous codes on your Jaguar’s garage door opener by first turning (rotating) the ignition key to the “I” position (first notch). Next, simultaneously hold button 1 (left most button) and button 3 (right most button) down until the middle button’s red light changes from continuous on to a rapid flash. This process takes approximately 20-25 seconds. What follows is a two part process. In the first part, get your Genie portable remote and hold it near (approximately 3 inches away from) your Jaguar’s garage door opener console buttons. Choose which button on your Jaguar’s remote you wish to dedicate to your Genie door opener and simultaneously press and hold your Genie opener button and your Jaguar’s opener button. The red light on your Jaguar’s center button (button #2) will light up and within 1-2 seconds will begin to flash rapidly. You have just completed part 1 of the two part process.

Part two: Now it is time to utilize the “Learn” function on your Genie garage door opener. Press the “Learn” button on your Genie garage door opener. The red LED adjacent to the “Learn” button will begin to flash. You now have 30 seconds in which to program your Jaguar’s opener button. Using the same button you just used in the “part 1” procedure, press and hold the same button for several seconds. As before, your Jaguar’s red light in the middle button will light up and within 1-2 seconds, it will flash rapidly. Release the button you are programming. Now, here is the key piece of information! Once again, press and hold that same button. Once again, the center button’s red light will flash rapidly. Release your newly programmed button. This procedure proved successful in my application. Here is what has just happened. The first time you pressed your Jaguar’s remote button tells the Genie opener that it exists and that it is a viable candidate for making your life easier (opening the damn door). The second time you press your Jaguar’s remote button confirms to the Genie’s rolling code that your Jaguar’s signal is legitimate and is to be trusted from then on.