Many controller faults are repairs rather than replacements — a blown fuse, a failed transformer or a bad connection costs far less than a new unit. When replacement is warranted, general North Georgia market figures put a conventional controller at roughly $225 to $550 installed and a smart WiFi controller at roughly $325 to $750 installed, with station count, enclosure and configuration time driving the difference. Irrigation Medics bills $125 for the first hour on site and $80 per hour after, parts separate. Those ranges are market estimates, not quotes.
Repair first: what fails that does not need a new controller
A blown fuse deserves emphasis, because replacing it without finding out why it blew is a wasted visit. A fuse blows because too much current was drawn, and that almost always means a short in the field — a nicked wire, a failed splice sitting in water, or a shorted solenoid. Measuring resistance on each station identifies the offending one in minutes.
- The fuse or resettable breaker, usually blown by a short in the field wiring rather than by the controller itself.
- The plug-in transformer that converts household power to the 24 volts the valves need.
- A loose or corroded terminal connection, particularly on outdoor enclosures.
- A single failed station output, on a controller where the rest of the stations still work.
- A dead backup battery, which can leave a program lost after every power interruption.
What moves the price of a replacement
| Factor | Effect on cost |
|---|---|
| Station count | The single biggest driver — a 6-station unit and a 24-station unit are very different products |
| Indoor or outdoor mounting | Outdoor units need a weather-rated, lockable enclosure |
| Conventional or smart | Smart controllers cost more as hardware and take longer to configure properly |
| Existing wiring condition | Sound labelled wire transfers quickly; a bundle of unlabelled wire has to be identified station by station |
| Power supply at the location | An existing outlet or hardwired supply is straightforward; adding one is electrical work |
| Number of zones needing reprogramming | Configuration time scales with zone count, especially on smart units |
| Accessories to reconnect | Rain sensors, master valve and pump start relays each need reconnecting and testing |
Want this looked at rather than read about?
Diagnostic-first visits across North Georgia. Call 770.335.8595 or request service — you get an estimate before any work begins.
Is a smart controller worth the difference?
It depends entirely on whether the system underneath it is sound. A smart controller adjusts watering to weather data and lets you manage the system from a phone, and on a well-maintained system with correct coverage it genuinely reduces waste and takes the guesswork out of seasonal adjustment.
On a system with a broken head, a seeping valve and two mis-aimed zones, a smart controller automates all of that more precisely. It cannot detect a coverage fault, and it will not notice a lateral leak. The order of operations is: fix the hydraulics, then automate.
The other honest point is that most of the savings people attribute to smart controllers come from correct scheduling, and correct scheduling is available on a conventional controller too — it just has to be done by hand each season. What you are buying is the automation of a task that otherwise gets forgotten.
The installation detail that matters most
Wire identification. A controller swap is only quick if the existing field wires are labelled or can be identified confidently. Where they are not, each station wire has to be traced back to its valve so the zone numbering still means something afterwards — otherwise you end up with a working controller that waters the front lawn when you press the button for the back.
Getting that right, and writing down what each station actually operates, is what makes every future repair on the system cheaper. It is worth the time.
Related answers
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Services that fix this
Controller Repair
The brain of the system: no power, dead stations, lost schedules and surge damage diagnosed and repaired.
Read more →Smart Irrigation Controllers
Weather-based watering that adjusts itself — set up properly for Georgia clay and the legal watering window.
Read more →Where we work
Irrigation Medics repairs irrigation systems across Hall County and the Lake Lanier communities, the Gwinnett corridor through Duluth, Suwanee and Buford, and North Fulton and Forsyth — Johns Creek, Alpharetta, Milton, Roswell and Cumming. Same rates throughout. See the service area.