Toro Vision 1 Controller Blows Top Fuse (0.5A) Repeatedly

Why the Toro Vision 1's F1 Fuse Keeps Blowing

Both fuses blown; bottom 1A fuse replaced okay. Top 0.5A fuse (F1) blows immediately on power-up.

F1 protects the controller from overvoltage (lightning, bad transformer, power surge).

Test transformer output: should be 22–26 VAC. If higher, replace transformer.
If transformer is good, recent lightning may have damaged the controller's input circuitry. The controller will need replacement.

Irrigation: Toro ECTRA "Fuse" Flash on Zone 2: Internal Breaker Tripped by Shorted Solenoid or Wire; Toro Vision II Controller Repeatedly Cycles and Won’t Shut Off; Toro DDC-6: Blank Screen with AC Power, Works on Battery Only; Locating a Buried Valve Box on a Toro Vision System; Toro Vision Controller Mystery 1 AM Cycle: Default Program After Power Loss; Toro Vision Series I Blows Fuses After Storm: Replace Controller; Toro Vision 1 Transformer Wiring: Terminals 0, 15, 24 After Wire Disconnection; Toro Vision I F2 Fuse Blows Instantly – Transformer or Controller; Sprinkler Controller Display Dead: Transformer or Fuse Check; Toro Vision I Controller Starting at Wrong Time

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