Smart Irrigation Controller Upgrades

A conventional controller does exactly what it is told, forever. If it was programmed for twenty minutes per zone three times a week in April, it will still be running twenty minutes three times a week in a rainy June and a dry September. Most of the waste on a well-built irrigation system is not leaks — it is a good system running a schedule that stopped matching the weather months ago.

A smart controller closes that gap. It pulls local weather data, tracks how much water the landscape has actually received and lost, and shortens, skips or extends cycles accordingly. The hardware is not the interesting part; the configuration is. A smart controller that has been plugged in and left on defaults performs no better than the timer it replaced. What makes it work is telling it the truth about each zone: clay soil, slope, rotors versus spray heads, shade versus full sun.

That is the part we do carefully, because it is where the savings actually come from.

Symptoms homeowners notice

• The system waters during or right after a rainstorm
• Run times have not been changed since the system was installed
• Summer bills spike and nobody is sure whether the schedule is to blame
• You want to check or shut off the system from your phone while travelling
• The existing controller has lost its program more than once
• Some areas stay soggy while others stay dry on the same schedule
• Water running off a slope or down the driveway during cycles
• You would like alerts when a zone behaves abnormally
• The existing controller is old enough that parts are no longer available

The most likely causes

• Fixed schedules cannot track weather. A conventional timer has no knowledge of rainfall, temperature or season. It repeats what it was given, which is correct for perhaps a few weeks of the year.
• Seasonal adjustment never gets used. Most conventional controllers have a seasonal adjust feature. Almost nobody touches it after the install, so the system waters at peak-summer rates in October.
• Rain sensors are a blunt instrument. A rain sensor interrupts a cycle during rain, which helps, but it knows nothing about how much water the soil already holds or how hot the coming week will be.
• Clay soil needs cycling, not longer runs. Piedmont clay absorbs water slowly. A single long run time produces runoff. Smart controllers can split runs into soak cycles automatically once told the soil type.
• One schedule for very different zones. A shaded bed on drip and a full-sun slope on rotors have almost nothing in common, but a fixed program often treats them similarly.
• Nobody notices a failure. A conventional controller reports nothing. A zone that stopped working, or one that runs twice, goes unnoticed until turf dies or a bill arrives.

How a technician diagnoses it

• Before recommending a smart controller we check whether one will actually help, because there are systems where it is the wrong first purchase.
• A smart controller optimises scheduling. It cannot fix hydraulics. If the system has a mainline leak, a valve weeping, broken heads or a zone overloaded with too many heads, a smart controller will simply schedule a broken system more intelligently. On those systems we fix the hardware first and upgrade the controller second — in that order, or the savings never appear.
• We also check the practicalities. Station count, because the new controller needs to match or exceed it with room to grow. WiFi signal strength at the controller location, since garages and basements are often the weakest spot in the house. Whether there is an existing rain sensor to retire or retain. And whether the field wiring is sound, because transferring good wiring is quick and transferring a system with three latent wire faults is not.
• Then we look at each zone individually: head type, soil, slope, sun exposure and plant material. That is the information the controller needs, and gathering it is what separates a configured smart controller from an expensive clock.

What the repair involves

1. Verify the system is worth automating. Zones run, heads checked, obvious leaks and pressure problems identified. Hardware faults get fixed before scheduling gets clever.
2. Confirm placement and signal. WiFi strength checked at the mounting location. A weak signal is solved before installation, not after.
3. Label and transfer wiring. Every field wire is labelled at the old controller and terminated to the same zone number on the new one, so zone 3 is still the zone you think it is.
4. Mount and power. Indoor or weather-rated outdoor enclosure as the location requires, with the transformer and common properly connected.
5. Configure zone by zone. Soil type, slope, head type, sun exposure and plant material entered for each zone. This is the step that produces the savings.
6. Program inside the legal window. Schedules set within the Georgia 4 p.m. to 10 a.m. landscape watering window, with cycle-and-soak timing for clay soil and enough margin for the whole system to finish before the morning cutoff.
7. Set up the app and alerts. The controller is connected to your account on your phone, notifications configured, and remote shutoff demonstrated.
8. Run every zone and hand over. All zones cycled, coverage watched, and the zone-to-area map written down so the app labels mean something.

What affects the cost

A smart controller upgrade costs more than a like-for-like timer swap, mostly in configuration time rather than hardware.

• Station count required, including spare capacity for future zones
• Indoor versus weather-rated outdoor enclosure
• Controller model and feature set
• Whether existing field wiring can be transferred directly or needs repair first
• Whether WiFi coverage at the controller location needs improving
• Number of zones to configure, since each one is set up individually
• Whether flow or soil-moisture sensors are being added
• Whether a new outlet or surge protection is needed at the controller

For published rates and general North Georgia market ranges by repair type, see the Georgia irrigation repair cost guide.

Does this repair require digging?

None. A smart controller upgrade is entirely at the wall: the old unit comes off, the new one goes on, and the same field wires are transferred across.

The only way digging enters the picture is if testing during the upgrade reveals a wire fault or a valve problem that was already there. We would tell you about that as a separate repair rather than folding it silently into a controller job.

How long does it take?

A straightforward upgrade on a system with sound wiring is usually a one-to-two hour job on a typical residential controller: transfer, mount, connect, configure, app setup, run every zone.

Larger systems take longer simply because every zone is configured individually, and a sixteen-zone property has sixteen sets of soil, slope and head-type decisions. Properties with poor WiFi at the controller, or with wiring that needs sorting out first, add time. We would rather spend the extra half hour on configuration than hand over a smart controller running generic defaults.

Should the water be shut off?

No water shutoff is needed for a controller upgrade. The valves stay closed throughout, and the water supply is untouched.

After the upgrade you gain a better shutoff than the isolation valve for everyday purposes: the app lets you stop a running cycle or suspend the whole system from anywhere. That is genuinely useful when you are away and a neighbour tells you a head is spraying the street. It does not replace the isolation valve for an actual leak — a stuck valve still needs water physically shut off.

Will leaving it alone raise the water bill?

This is the whole argument for the upgrade. The waste on most systems is a schedule that no longer matches conditions, and a smart controller addresses that continuously instead of whenever someone remembers to change it.

The specific savings come from skipping cycles when rain has already delivered the water, shortening cycles in mild weather instead of running peak-summer times in October and April, and splitting long runs into soak cycles so water infiltrates clay instead of running down a slope and into the street.

The honest caveat: a smart controller does not find leaks in the ground and will not stop a valve that is weeping. If your bill jumped suddenly, that is a leak, not a scheduling problem, and the controller upgrade should come after the repair.

North Georgia considerations

The legal watering window is the first thing a smart controller has to respect here. The Georgia Water Stewardship Act permits landscape watering with publicly supplied water only between 4 p.m. and 10 a.m., any day of the week; watering between 10 a.m. and 4 p.m. is not permitted. Private wells and reuse water are exempt. Some smart controllers, left to their own devices, will happily schedule a cycle at 11 a.m. because that is when their algorithm prefers. Every controller we configure has that window enforced, with start times staggered so a multi-zone system finishes before the 10 a.m. cutoff rather than being cut off mid-cycle. Always check with your own water provider as well, since individual utilities may add their own restrictions.

Piedmont clay is the second. Clay-heavy soil across this region has a low infiltration rate, so a twenty-five minute run on a slope produces runoff long before the root zone is wet. Telling the controller the soil is clay lets it split that into shorter cycles with soak periods between, which is often the single biggest improvement on an older system.

Rainfall pattern is the third. North Georgia gets substantial summer thunderstorms, frequently heavy and localised. A weather-based controller catches those and skips the next cycle, where a fixed timer waters into already-saturated clay. On rolling terrain around Lake Lanier and the Chattahoochee corridor, where slope makes runoff worse, that difference shows up quickly in both the bill and the turf.

Frequently asked questions

Related services

Where we do this work

Irrigation Medics covers Hall County and the Lake Lanier communities, the Gwinnett corridor through Duluth, Suwanee and Buford, and North Fulton and Forsyth. Rates are the same everywhere — see the full service area.