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Irrigation/RD 600 - EXT dial doesn't change functions


I noticed the watering stop last week. My Irritrol RD 600 -EXT has 7:00 AM always on the dial, and turning the dial does not change the function or output. Changing the battery does nothing too - the 7:00 AM read out just stays there. I can turn on the water by hand on the stems, but the system isn't working. Where should I start to remedy this? Thanks.

Your microprocessor may have been compromised. I would contact them directly as they do offer a repair service. Otherwise you may consider a new controller.

Phone Numbers & Hours of Operation:
Controller Repair Services:
M-F from 6:00am to 2:30pm, Pacific Time

Best of luck


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Robert Diersing


I am able to answer any questions related to lawn irrigation systems and backflow devices. But pumps are not my speciality since they are not common in my area. Most of my product experience is in Hunter, Rainbird and Irritrol components.


I have been in the Irrigation Industry since 1998 with experience in everything from residential to athletic fields, commercial, industrial to complete Hospital campuses

Irrigation Association

I have been quoted in trade magazine articles.

Kent State University 12 CEU's per a year in Industry related classes

Awards and Honors
Irrigation Association Certifications: Certified Irrigation Contractor State of Florida Licensed Irrigation Contractor State of Florida Certified Backflow Tester State of Ohio Certified Backflow Tester EPA WaterSense Partner

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Hospitals, School Districts, National Franchises, Government Agencies

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