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. Brian's picture
    Jan 15, 2024

    Please send an email with your contact informaotion to my attention at and someone from our engineering department will contact you.  Thanks

  1. Rick Kourey's picture
    Jan 14, 2024

    I am looking for an RFI remedy for my three Guardian 628 garage door openers. When I run 100 watts no problem. But when I run 600 to 1500 watts, the door openers go up and down and then remain open.


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