Common sprinkler system controller programming errors

We love the Hunter Pro-C controller so much that we use it almost exclusively in all of our residential and commercial lawn sprinkler installations. It is very user friendly, functional, compatible with all automatic lawn irrigation systems and comes with a great warranty from the factory

Hunter Industries has several lines of commercial and residential controllers, but they all operate similarly. These timers are pretty easy to understand; however, there are a couple of irrigation system scheduling mistakes that trip people up.

The most common mistake is confusing the “Set watering start times” and “Set station run times” features.

Customer: “My sprinkler system runs through the entire cycle just like I programmed it, but then it starts all over and runs through the cycle again and again.”
Well trained Irrigation Incorporated technician: “Check the program start times and be sure that only Start Time #1 is programmed. The others should read “off.”

Most Hunter controllers can operate several times per day if desired. The Pro-C has three programs… A,B and C. Each of these three programs can run up to four times per day. That’s a total possibility of watering up to 12 times per day.

​Most customers will only need to utilize Program A and water their lawn and landscape once a day. If Program A has all four start times set up, then it will run four consecutive cycles leaving the customer baffled as to how this happened!

Step-by-Step: How to Set Your Hunter Pro-C Controller to Water Once Per Day

Here’s a simplified guide to make sure your system only runs once per day with the correct run times per zone:

Set the Watering Start Time:

1. Press the PRG button until “Program A” appears on the screen.
2. Turn the dial to “Set Watering Start Times.”
3. Use the + or – buttons to set Start Time #1 (e.g., 8:00 a.m.).
4. Press the right arrow to move to Start Time #2.
5. Use the + or – buttons to change it to “OFF.”
6. Repeat this for Start Times #3 and #4, and set both to OFF.

Set the Run Time Per Zone:

1. Turn the dial to “Set Station Run Times.”
2. Use the arrows to go to Station #1.
3. Set the watering time (e.g., 10 minutes) with the + or – keys.
4. Use the right arrow to move to the next station and repeat.

Once completed, your system is now programmed to water once per day for the appropriate time per zone.

Common Programming Mistakes to Avoid

Even though the Hunter Pro-C is intuitive, many users still fall into these common traps:

• Multiple Start Times Enabled – This causes the system to run the full cycle multiple times.
• Using Programs A, B, and C Simultaneously – Most homeowners only need Program A. Don’t accidentally schedule all three.
• Missing Zone Run Times – If a station doesn’t have a run time, it won’t water—even if the system starts.
• No Seasonal Adjustments – Not changing your watering schedule between seasons can result in overwatering or under-watering.
• Power Loss Without Backup Battery – Your settings may reset if you don’t have a battery installed.

How to Use Your Sprinkler System Controller Effectively

Sometimes your irrigation controller can look intimidating, but it really isn’t. Actually, it’s very simple—and with just a little practice, you’ll feel confident making schedule changes whenever needed. This not only keeps your lawn and landscape healthy but can also help lower your water bill.

For best results, stick with Program A unless there’s a special need for B or C, and only set Start Time #1 unless you want multiple watering cycles. Water early in the morning to reduce evaporation, adjust your schedule with seasonal changes, and remember to replace the battery regularly to protect your settings.

Conclusion

Sprinkler system controller programming errors can lead to overwatering, high utility bills, and an unhealthy lawn — but they’re easy to fix with the right knowledge. Whether you’re fixing irrigation system scheduling mistakes, handling smart sprinkler controller troubleshooting, or just learning how to program a lawn sprinkler timer, understanding the basics helps you avoid common pitfalls. With a few smart adjustments, your irrigation system can run efficiently, conserve water, and keep your landscape thriving all year long.

If you need help programming your sprinkler system controller, give us a call at (440)935-1182 or send us an email at [email protected]. We’d be happy to help you!