Commercial & property management

Door closers and panic bars: signs they need service

The closer and the panic bar are the two pieces of hardware on a commercial door that work hardest and get noticed least, right up until a door will not latch at closing time or will not open when it should.

By Timmy Creighton, founder and licensed locksmith · Major Key Locksmith · October 2026

Door closers

Most commercial closers have adjustment valves that control how fast the door swings, how fast it finishes the last few inches, and how much it resists being thrown open.

Slamming. Usually an adjustment. Left alone, it loosens hardware and cracks frames.
Not latching. The door stops just short. Also usually an adjustment, sometimes a sign the door has dropped.
Oil on the floor or the closer body. The seals have failed. A leaking closer cannot be adjusted back to health and needs replacing.
The door swings freely with no resistance. The closer has lost its fluid or its arm has come loose.

When a closer needs replacing, we supply and fit commercial-duty closers, including LCN.

Panic bars

Panic hardware, or exit devices, let people leave by pushing the bar, without a key and without knowing how the door works. That is a life-safety function, so it is worth keeping right.

Sticky or slow to return. Needs cleaning, adjustment or parts.
The door does not latch after someone goes out. Often the closer, sometimes the latch on the device.
It has been propped or tied to stay unlocked. Many non-fire-rated devices can be “dogged” with a key to hold the latch back during business hours. Devices on fire-rated doors are made without that feature, because a fire door must latch.

Get it looked at

Our commercial evaluation is $350: diagnosed, quoted, and often fixed on the same visit. For multi-door properties we can walk every opening and give you one list.

Questions people ask

Can a door closer be repaired, or only replaced?

Adjustment fixes most slamming and not-latching problems. A closer leaking oil has failed seals and is normally replaced.

Can we leave our panic bar door unlocked during business hours?

On many non-fire-rated doors, yes, by dogging the device with its key. Fire-rated doors must latch, so their devices are not made to be dogged.

Our exit door has a chain on it at night. Is that okay?

No. Chaining or padlocking an exit door blocks the way out in an emergency. If the door needs to be more secure at night, there are code-compliant ways to do it, and we can talk you through them.

Want a straight answer about your building?

Tell us what you are dealing with. We will say what it needs, what it costs, and whether it is a job for us at all.

Commercial door hardware Call 973-922-3597

Keep reading

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Any price mentioned here is the one published on our pricing page as of October 2026. The final price is always confirmed with you before any work begins. More answers from the blog →