The following article details how to modify a Guardian Model 628 to operate efficiently in an RF environment.

ARTICLE: Garage Door Opener RFI Modification

The following article details modifications made to a Guardian Model 628 to operate unimpared in an environment with radio frequency interference. Please follow the link below for full details.

  1. Mr. Roger M Martin's picture
    Aug 26, 2017

    I bought a Gaurdian GDOWLESKEY*D keyless pad , but i cant find a way to program it to my exsiting door opener that is 25 Yrs OLd.

    Can it be done --or is the opener unable to to take a keyless pad.
    If so --is there a hard wired system avavilble?

  1. Brian's picture
    Aug 26, 2017

    Dear Mr. Martin,

    Please send a photo of the garage door operator to which you are trying to program the keypad to or call 424-272-6998 on Monday and we'll be able to resolve the issue at hand.  Thanks


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