Hardie Controller: Last 2 Stations Won't Run Manually

Hardie Controller Works on Stations 1–3, Not 4–5

If manual operation works for first 3 stations but not 4–5, the fault is likely in the field (valves/wiring), not the controller.

Voltage Test at Controller

1. Activate station 4 manually.
2. Measure VAC at controller terminals: Common (C) to Station 4.
3. Should read 24–26 VAC.
4. If voltage good → controller OK, problem in field.
5. If voltage low/missing → controller output failed.

Field Voltage Test

At the valve box for station 4, measure at solenoid leads while station 4 is active. Good voltage = wiring OK, solenoid/diaphragm bad. Low voltage = wire damage or bad splice.

Repair

• Replace solenoid (unscrew, swap, same two wires).
• If solenoid clicks but valve doesn't open → replace diaphragm.
• Guide: irrigationtutorials.com