Hardie HR6100 Controller: Zone 2 Not Activating

On a Hardie HR6100 controller, zones 1, 3, and 4 operate normally, but zone 2 fails to turn on.

Simple Diagnostic Test

Swap the wires for zone 2 and zone 3 at the controller terminals.

If zone 2 runs when connected to terminal 3, the controller is faulty.
If zone 2 still does not run, the solenoid or field wiring for zone 2 is the problem.

This quick test isolates the fault to either the controller output or the valve circuit.

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