一、防盗门外锁芯打不开怎么回事?

产生原因：

1、外锁芯在受到外力的作用无痕蓄意破坏，使锁芯内部弹子错位，会使锁芯无法开启。

2、被别有用心的人向锁芯内注入胶水和异物，会使锁芯无法开启。

3、甚至不法分子利用技术开启工具拨动护锁片产生自动锁死，会使锁芯无法开启。

解决方法：

1、清理干净异物，并加铅笔粉末后用钥匙开启。

2、别人蓄意破坏导致锁芯打不开，所以建议用户更换一把新锁。

二、开门的时候有刺耳金属摩擦声音怎么办?

当开关门有金属摩擦声时，又懒得找维修人员来修理，亲们可以尝试在门折页上滴少许润滑油。

三、为什么防盗门经常出现打开关上困难的问题?

因为钢质门重量较重，使用一段时间后(通常为1-3个月)门扇有可能会有轻微下坠而导致开关不太轻松。确定是这一问题后可把门框上的锁控用挫刀向下挫大一些，或在合页上加垫一只薄薄的介子。

四、想开门，钥匙却插不进锁头里，怎么办?

有时候大家可能还会遇到开门时钥匙无法完全插入锁孔，如果你现在处于冬天的北方，首先要检查锁孔内是否结冰，其他季节检查锁孔里是否有其它异物。实在不行就不要硬碰硬咯，还是乖乖找维修人员吧。

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五、锁门时第二道锁却锁不上，怎么办?

小编隔壁的邻居前阵子的防盗门也出现了小毛病，防盗门在使用过程中，由于开关门时撞击过大，有可能造成门框和门体错位，锁舌被卡住。不用担心!如果是对的钥匙，可以正常插入锁孔，可以尝试往锁芯里吹入钢笔沫。对门用力往里推一下，或者用拉一下门体。