Irritrol KwikDial: Intermittent Zone Operation and Blinking Battery Symbol

A single zone cycling on/off with a blinking battery symbol and "SEN" message points to a faulty solenoid or rain sensor issue.

Diagnosis

• Blinking battery: Controller recharging internal battery—normal if brief.
• One zone intermittent: Likely a failing solenoid on that valve.
• "SEN" message: Rain sensor active or faulty sensor wire.

Steps

1. Check rain sensor—bypass if needed.
2. Test solenoid resistance (25–60 ohms).
3. Replace solenoid if out of range.
4. If multiple zones affected, controller may be failing.