KDI TECH HELP
Automatic Gate Help Center
Find the symptom that matches your gate, make safe visual checks and know when it is time to call a professional.
Built for residential, HOA, multifamily and commercial gate systems throughout Charleston and the South Carolina Lowcountry.
⚠ Gate safety comes first
Never bypass a photo eye, safety edge or monitored input. Do not increase force to overcome a binding gate or work inside energized equipment. Stop if the gate moves unpredictably.
What is your gate doing?
Choose the closest symptom to jump directly to a troubleshooting guide.
Browse all guides
5 GUIDES
Start with the symptom
Fast, safety-first checks for the most common automatic-gate problems.
Automatic gate won’t close →
Check photo eyes, obstructions and alignment before requesting service.
LiftMaster gate won’t open →
Separate access-device, power, safety and mechanical causes.
Gate closes, then reopens →
Understand safety inputs, obstructions and mechanical resistance.
Gate stuck after a power outage →
Restore normal operation safely and recognize battery-related symptoms.
Sliding gate dragging or off track →
Spot track, wheel, rack and alignment problems without forcing the gate.
3 GUIDES
LiftMaster diagnostics
Model-aware guidance for LA400 and LA500 operators, limits and diagnostic codes.
Read the correct diagnostic code →
Identify the controller and record the exact code sequence safely.
LA500 limit lights blinking →
Learn what SET OPEN and SET CLOSE indicators usually mean.
LA500 errors 93, 94 and 99 →
Understand the codes and when to stop cycling the operator.
2 GUIDES
Access and vehicle detection
Isolate problems involving remotes, keypads, receivers and in-ground vehicle loops.
Remote or keypad not working →
Determine whether the problem is the device, receiver, power or programming.
Is the vehicle loop working? →
Use safe observations to distinguish detection, wiring and controller issues.
1 GUIDE
Maintenance and reliability
Prevent avoidable failures and plan service around gate usage and environment.
How often should a gate be serviced? →
Choose a practical inspection and maintenance interval for your property.
Inside a gate operator
Still need help?
KDI Parking & Controls installs, repairs and modernizes automatic gates and access-control systems throughout Charleston and the South Carolina Lowcountry.
Safety-first troubleshooting • Local gate specialists • Same-day repair available when scheduled