Richdel 446PR: No Zones Work After Valve Repair — Controller Voltage Test Needed

After Replacing Diaphragm/Solenoid on Zone 2, All Zones Dead

Manual bleed works (water sprays from bleed screw), but no automatic or manual operation from controller.

Step-by-Step Voltage Testing

1. Test controller output: Run Zone 1. Measure voltage at terminal #1 (+) vs C/common (-). Need 22–26 VAC. - Low voltage → controller bad.
2. If controller OK, test at valve wires: Same measurement at Zone 1 solenoid wires. - Low voltage → field wire damaged. - Good voltage → check solenoid wiring (one wire to common, one to hot).
3. If voltage at solenoid but valve doesn't open: Diaphragm installed incorrectly or defective. Reinstall or replace.

Key Insight

Bleed screw operation proves water supply and valve mechanics work. The fault is electrical: controller, wiring, or solenoid connection.