The controller (timer) tells each zone when to run and sends the signal that opens each valve.
Controller repair includes reprogramming, fixing terminal wiring, replacing transformers or fuses, and diagnosing failed station outputs.
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Signs You May Need This Repair
- Blank screen
- Zones not running on schedule
- Zones running at wrong times
- Some zones not responding
- Error messages
Common Causes
- Programming issues
- Power or transformer problems
- Loose terminal wiring
- Surge damage
- Failed station outputs
How a Technician Handles It
- Review programs and settings
- Check power and transformer output
- Inspect terminal wiring
- Test station outputs
- Repair, reprogram or recommend replacement
Repair or Replace?
Settings, wiring and transformers are often fixable. If outputs or the main board have failed, replacing the controller is usually more practical.
DIY or Call a Pro?
Checking settings, rain delay and GFCI outlets is safe. Electrical testing is best left to a technician.
Typical Cost
See our Sprinkler Controller Replacement Cost Guide for typical ranges. Prices vary by location, parts, access and how much diagnosis is needed.
Related Problems
- Why Isn’t My Sprinkler Controller Working?
- Why Is My Sprinkler Controller Screen Blank?
- Why Won’t My Sprinkler System Turn On?
- Why Are My Sprinklers Running Twice?
- Why Are Multiple Sprinkler Zones Not Working?
Related Repairs
Frequently Asked Questions
Can a sprinkler controller be repaired?
Often, when the issue is settings, wiring, a transformer or a fuse.
When should I replace my controller?
When testing shows failed outputs or the controller is unreliable.
Can a storm damage my controller?
Yes. Surges can damage transformers and outputs.
Bottom Line
Controller repair starts with the simple checks and moves to electrical testing if needed. A technician can tell you whether repair or replacement is the better option.
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