invincible

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  1. S

    1994 Harman Invincible Insert - Won't shut down

    Hello, Over the course of 2 weekends, my Harman Invincible insert began a 3 blink error message. It would reset after being unplugged for a few seconds, but would resume the error message hours after. This increased in frequency until it became a constant error signal. In one instance...
  2. Dadof2nutz

    Harman Invincible Insert woes

    New to the forum, I finally joined after searching the web & constantly being directed to the site. I have a Harman Invincible insert that I bought used in 2013. I installed it in the early fall and it worked flawlessly all last winter with routine maintenance. I gave it a real thorough cleaning...