Valve symptoms are usually zone symptoms.
Crandall irrigation problems are easier to diagnose when you watch both coverage and where water travels. Persistent runoff, low spots and drainage paths should be part of the inspection, not treated as background.
Zone will not start
Valve, solenoid, wiring, controller signal or supply can all be involved.
Zone will not stop
A stuck or debris-affected valve can keep flowing after the controller stops.
Wet valve box
Standing water or hissing near a valve box can point to a fitting, diaphragm or seal problem.
Collect clues while the system runs.
- Which zone contains the problem?
- Does the controller show that zone active?
- Does the zone start and shut off correctly?
- Is water pooling, leaking or spraying pavement?
- Did the issue begin after digging, mowing or landscaping work?
- Do nearby heads or other zones show the same symptom?
The visible symptom and the failed component are not always the same thing.
Local symptom
One bad head or one wet spot may be local, but pressure, wiring and valve problems can create symptoms elsewhere in a zone.
System symptom
If multiple heads are weak, several zones misbehave or the controller acts inconsistently, diagnose before stacking unrelated part replacements.
Repair and operation belong in the same conversation.
Crandall irrigation problems are easier to diagnose when you watch both coverage and where water travels. Persistent runoff, low spots and drainage paths should be part of the inspection, not treated as background.
After repair: run the affected zone again and confirm shutoff, coverage, leaks, overspray and runoff.
Related irrigation pages.
Need valve repair in Crandall?
Have the zone, symptom, controller behavior and leak or coverage clues ready.