Richdel 446PR "FUSE 7 16" Error—Controller Replacement Time

Richdel 446PR (6-zone) shows "FUSE 7 16" randomly, even when not scheduled. Manual run works. Sporadic auto operation.

Diagnosis

Circuit board failing. "FUSE 7 16" = corrupted display (zone 7 on 6-zone controller?). Intermittent = aging components.

Replace controller. Not worth repair. Options:

Same wiring, modern reliability.

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