Closers, latches, panic hardware, levers, alignment, and routine door fixes.
Most hydraulic commercial door closers have separate valves for sweep and latch speed. Small adjustments can correct a door that slams, but turning the wrong screw too far can cause leakage or unreliable closing—especially on fire-rated doors.
A commercial door that stops before latching may have the closer adjusted too slowly, weak spring power, binding hinges, weatherstripping resistance, frame misalignment, or building pressure. Check mechanical drag before turning closer valves.
A commercial door that closes but will not latch is often sagging slightly, rubbing, hitting a misaligned strike, or moving too slowly through the final inch. Use wear marks and door gaps to identify what shifted before filing or moving hardware.
A panic bar that sticks or does not fully retract can be caused by door sag, dirty latch areas, loose trim, misaligned strikes, or worn hardware. Because panic hardware is life-safety equipment, routine checks should stay conservative and the door must always release freely from the egress side.
A loose commercial lever is often caused by a loose set screw, rose/trim fasteners, through-bolts, or wear inside the lockset. Tighten the correct fastener and verify the latch works smoothly rather than simply cranking on the visible handle.