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New Orbit Controller Shows Fault on One Station—Wiring or Solenoid?

Landscaper-installed Orbit controller shows fault on one station. Manual valve operation works. Landscaper threatens $125 charge if homeowner caused issue.

Fault Meaning

"Fault" = electrical short detected on that station circuit. Two causes:

Crossed/shorted wires: Recent digging may have nicked insulation
Bad solenoid: Even new solenoids can be defective

Determining Responsibility

New valve installed: Landscaper responsible for defective solenoid
Existing valve: Could be pre-existing solenoid failure
Recent digging by homeowner: Possible wire damage

Diagnostic Test

Disconnect field wire from controller terminal
Measure solenoid resistance (20-60 Ohms = good)
If solenoid good → wire issue (likely landscaper's installation)

If landscaper installed new valve, they should warranty the solenoid. Don't accept blame without testing.

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