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Illinois | I have a 7 section 4420 with original AIM, and twice had the small relay go bad that’s zip tied to the top left of the center rack. It’s roughly a bit smaller than a deck of cards, and I believe the original one was black and replacements have been red.
Symptoms were similar, but I think when mine went bad, certain sections stopped spraying completely instead of AIM solenoids quitting. | |
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AIM Command issues
