When your Calgary irrigation controller display goes blank, shows an error, or the system stops running on schedule, the cause is usually one of five things — most of which you can diagnose in under 10 minutes. This guide helps you identify the issue before calling for a repair visit.
Controller Not Working — Quick Diagnosis
| Symptom | Most Likely Cause | First Step |
|---|---|---|
| Display blank / unit dead | Power failure — transformer or outlet | Check if outlet has power; test transformer with a multimeter |
| Shows “ERR” or zone fault | Short circuit in zone wiring (damaged wire or bad solenoid) | Disconnect zone terminals one at a time until error clears |
| Schedule set but won’t run | Rain sensor override or seasonal adjustment set to 0% | Check rain sensor bypass switch; check seasonal adjustment setting |
| Runs continuously, won’t stop | Stuck-open zone valve or programming loop | Manually shut off at controller; check valve box for stuck valve |
| Clock resets to 12:00 repeatedly | Dead internal backup battery | Replace AAA/9V backup battery inside controller (usually $2-$5) |
Calgary-Specific: Rain Sensor Override
Many Calgary irrigation systems have a wireless or wired rain sensor that prevents the system from running after rainfall. If the sensor gets stuck in “wet” mode (common after prolonged rain or a sensor fault), the controller will show normal programming but refuse to run any zone. Look for a bypass switch near the sensor or at the controller — switching to bypass lets the system run while you diagnose or replace the sensor.
My irrigation controller was working and suddenly stopped — what happened?
Sudden stops in Calgary are most commonly caused by a power interruption (brief outage that wiped the clock) or a rain sensor stuck in “wet” position. A power outage erases the programmed schedule on older controllers — check that all zones still show run times and the clock shows the correct time. If the schedule is gone, reprogram it. If the schedule is intact but the system won’t run, check the rain sensor bypass. Still stuck: call J.G. Irrigation at 587-433-4795.
Irrigation Controller Repair Calgary — Same-Week
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