Hardie Total Control 12‑Station Shows “SHORT” on All Stations

16‑year‑old controller shows SHORT on all stations (including unused). Power cycle and battery removal didn’t help. Master valve wire removed, same result.

Possible Causes

1. If master valve/pump start relay draws more current than controller output, it triggers SHORT.
2. Otherwise, direct short in field wiring or controller board.

Check master valve solenoid current; if not used, inspect field wires for shorts.