开门正常、关门卡住，优先检查对位与摩擦If the open door works but the closed door binds, check alignment and friction
如果锁在门打开时可以顺畅转动，关门后却明显变紧，问题不一定来自锁芯本身，也可能是锁舌与门框孔位不齐、天气条挤压或门体轻微下垂。A lock that turns smoothly while the door is open but becomes tight when closed may not have a cylinder problem. The latch may be misaligned with the frame opening, weather stripping may add pressure, or the door may have shifted slightly.
- 若人在室内且能够安全操作，比较门打开与关闭时的转动阻力；不要把自己反锁在外。If you are safely inside, compare key resistance with the door open and closed. Do not perform a test that could leave you locked outside.
- 轻推、轻拉或稍微抬门测试阻力是否变化，但不要用身体撞门或强扭钥匙。Gently push, pull or slightly lift the door while testing once, but do not strike the door or force the key.
- 观察门与门框四周缝隙、锁舌擦痕、strike plate 位置和天气条是否明显挤压。Inspect the gaps around the door, latch rub marks, strike-plate position and compressed weather stripping.
- 检查铰链是否松动、门是否下垂，以及近期温湿度变化后问题是否加重。Check for loose hinges, a sagging door and whether temperature or humidity changes recently made the symptom worse.
- 若钥匙开始弯曲、锁芯松动或需要明显加力，立即停止，避免造成断钥匙。Stop if the key begins to bend, the cylinder moves or noticeably more force is required, because the key may break.
- 拍摄门边锁舌和门框孔位，并说明开门与关门测试的差异后再电话咨询。Photograph the latch and frame opening, and explain the difference between the open-door and closed-door tests when calling.
简短答案Short answer
如果开门时锁具正常、关门后才卡住，常见方向是锁舌与门框孔位不齐或门体受力。不要强扭，记录推拉门时的变化并拍摄锁舌与门框位置。If the lock works with the door open but binds only when closed, latch and frame misalignment or door pressure may be involved. Do not force the key; record how gentle pushing or pulling changes the symptom and photograph the latch alignment.
电话咨询前准备Before calling
准备所在 borough 与街区、建筑类型、门锁照片、钥匙状态、进入授权证明和希望安排的时间。拨打 518-870-5063 后，以当次电话确认的覆盖、时间与报价条件为准。Prepare the borough and neighborhood, building type, lock photos, key status, proof of authorization and preferred timing. Call 518-870-5063 to confirm coverage, scheduling and estimate conditions.
官方参考Official reference
官方页面用于核对公共安全、消费者或租客信息；本文提供一般说明，不代替执法、物业或法律专业意见。Use the official page for public-safety, consumer or tenant information. This general guide does not replace law-enforcement, property-management or legal advice.