You can follow this link here for programming: http://embed.widencdn.net/pdf/plus/cgi/qbzpzlupid/114a3485.pdf?u=gsn58x If there are any issues please contact customer service at 800-528-9131.
Here is the link to the KLIK1U remote: https://embed.widencdn.net/pdf/plus/cgi/qbzpzlupid/114a3485.pdf?u=8agqx6
No, it is not compatible with the Martin 3700 door opener.
This clicker in Not compatible with garage door openers manufactured by Allstar, Marantec, or Hormann. I suggest you get a Marantec clicker by searching online for someone (i.e., there are a few) that sells them.
No, this remote is not compatible with Guardian.
Absolutely. Purchased it a year and a half ago. Easily installed. Works great.
We recommend our KLIK3U Universal Garage Door Remote. https://www.homedepot.com/p/Chamberlain-Clicker-SS-Universal-Remote-Control-KLIK3U-SS/301305844
I just replaced a clicker on an older Genie. I used the GenieMaster, Model 37335R which is available from Home Depot. Needs to be programmed for your opener using old clicker as a model.
Left side is for one garage door opener and right for another. I would recheck program for right side again. Maybe defective.