Botanic Garden >> Gardening > >> Question and Answer >> Irrigation

Richdel 446PR Program A Fails After 2 Months – Slide Switches Worn

Program A works manually but not auto; Program B works. Controller is 1994 vintage.

Advice

Slide switches wear out. Replace with Irritrol Rain Dial (6/9/12 station). Wiring: label field wires, transfer to new controller. New controller has internal transformer; 110 V hookup same.

Irrigation: Irritrol Rain Dial RD1200 Button Failures – Panel Replacement; Controller Outputs 24V Constantly on One Zone: Workaround or Replace; Richdel 446 PRi Controller No Zones Activate: Common Wire and Flow Stem Checks; Find a Broken Zone Wire: Rent a Wire Locator; KwikDial Controller: All Zones Show Voltage Simultaneously—Controller Failed; Richdel 446PR "FUSE 7 16" Error—Controller Replacement Time; Zone 2 Works Without Pump, Fails With Pump – Relay Interference; Single Zone Not Working: Valve & Solenoid Troubleshooting; Richdel 446 Controller Shows Zone On but No Valve Response; Three Zones Won't Activate from Controller (1, 3, 5)

Garden Articles

Irritrol RD-900: Controller Clicks But No Zones Activate

Richdel 446 Auto Mode Loops: Remove Stacked Start Times

Irritrol HR-6100: Program C (Zone 4) Not Working—Valve Diagnosis

4-Zone Sprinkler: Zone 3 Dead, System Cycles Endlessly

Rain Bird E-9 Controller Dead After Power Outages: Reset and Diagnostic Steps

Why One Sprinkler Zone Stopped Working Overnight

Toro EL-6 Plus Zone 3 Failure: Complete Diagnostic Guide

Plants

Richdel 446PRi Zone 1 Runs Only 2 Min: Slide Switch Contact Failure

Richdel 446PR Zone 2 Not Working—Solenoid Location and Replacement

Toro Zone 1 Stays On All Cycle—Controller or Diaphragm

Hunter XC Station 1 Won't Activate from Controller—Valve Works Manually

Hunter Pro-C No Zones Run: Transformer Failed (0.02V)

Hunter ICC: Zones 2–8 Show Voltage But Don't Run—Wiring Fault

Zone 1 Pressure Drops to Zero After Winterization