Why won't my door close all the way by itself?

Your shop door, office door, or apartment entry door used to swing shut and click. Now it stops a few inches short, drifts closed and never latches, or slams hard enough to rattle the frame. On a door with a closer, that is almost always one of three things: the closer itself, the hinges, or the latch and strike. Each one points to a different fix.

This guide covers business and residential doors only. Roger does not handle vehicles of any kind.

First, what a door closer is

A door closer is the metal box mounted at the top of the door or the frame, with an arm that connects the two. Inside is a strong spring and a chamber of hydraulic fluid. The spring pulls the door shut. The fluid slows it down so it does not slam. Small valves on the body set how fast the door swings and how hard it finishes.

Most closers control two stages. The sweep is the main swing, from fully open to a few inches from the frame. The latch is the last few inches, where the door needs a little extra push to snap the latch into the strike. Many commercial closers also have a backcheck that cushions the door if it is thrown open hard.

Why it stops short or will not latch

• It got cold. This is the most common reason in the fall. The fluid inside thickens as the temperature drops, so a closer that was set right in the summer now moves slowly and runs out of push before the latch catches. It often comes back on its own in spring, which is why it seems to fix itself.
• The latch speed is set too slow, or the closer's spring power is too low for that door. Wind, a heavy door, or air pressure from the building's heating and cooling can be enough to hold it open the last inch.
• The door is dragging. Loose or worn hinge screws let the door sag, so it rubs the frame or the threshold near the latch side. The closer is fighting friction it was never set for.
• The latch and strike are out of line. The door reaches the frame but the latch hits the edge of the strike plate instead of dropping in. Look for fresh scrape marks on the strike.
• New weatherstripping or a thicker door sweep. Fresh seals for the winter can add just enough resistance that the door no longer closes the last inch.

Why it slams

• The sweep or latch speed is set too fast.
• The closer is leaking. Look for oily streaks on the closer body, the door, or the floor under it. A closer that has lost its fluid has nothing left to slow the spring, so the door bangs shut. A leaking closer cannot be refilled. It needs replacing.
• The arm has come loose from the frame or the door, or a screw has backed out, so the closer is no longer controlling the door properly.

What is safe to check yourself

• Open the door and look at the closer body and the floor for oil. Oil means replacement, not adjustment.
• Check the arm. Every screw at the closer, the arm shoe on the frame, and the elbow should be tight. A loose arm is often the whole problem.
• Tighten the hinge screws, especially the top hinge on the latch side of the frame. If the screws spin, they need longer screws into the framing, which a locksmith or handyman can do.
• Close the door slowly by hand. If it rubs, catches, or the latch hits the strike edge, the problem is the door or the strike, not the closer.
• If the closer has a cover, the adjustment valves are usually marked S (sweep), L (latch), and sometimes BC (backcheck). If you adjust one, turn it no more than a quarter turn at a time and test the door between turns. Clockwise usually slows the door, counterclockwise speeds it up, but check the label on your model.

What not to do

• Do not back an adjustment valve far out to make the door faster. On many closers, turning a valve out too far lets fluid escape and ruins the closer. If a quarter turn or two does not fix it, stop.
• Do not take the closer off the door or unhook the arm under tension. The spring inside is loaded, and the arm can swing hard. Removing and replacing a closer is a job for a locksmith or door hardware pro.
• Do not prop open, disconnect, or remove the closer on a fire-rated door. Doors to stairwells, corridors, and the door between an attached garage and a house are often required to close and latch on their own to slow fire and smoke. A closer on those doors is a safety device. If a door needs to stay open during the day, a locksmith can talk you through hold-open hardware that releases when the fire alarm sounds, installed the right way.
• Do not crank the spring power all the way up to beat the wind. A door that is too hard to open is a problem for people with limited strength, and many commercial doors have limits on how hard they can be to push.
• Do not chain, padlock, or lock a closer-equipped exit door so it cannot open from the inside. If the closer or latch is failing on an exit door, get it repaired, not blocked.

Adjust, repair, or replace

If the door is dragging or the strike is off, that is an alignment job, and the closer may be fine. If the closer is not leaking and only needs its speeds or spring power set for the season, that is an adjustment. If it is leaking, the arm is broken, or it is the wrong size for a heavy or windy door, it needs replacing.

A cold-weather slowdown that comes back every year can be fixed for good. A locksmith can set the closer for winter, or fit a closer built to hold its speed across temperatures.

What moves the price is whether it is an adjustment or a replacement, the size and grade of closer the door needs, whether the arm or mounting needs to change, whether the hinges or strike also need work, and whether it is after hours. You see a qualitative range up front, and the locksmith confirms the price in person after seeing the door.

Booking through Roger

Describe the door: business or home, inside or outside, what it does now (stops short, slams, will not latch, got slow when it turned cold), and whether you see oil on the closer. A photo of the closer and the label on it helps. Roger books one vetted local locksmith and confirms the appointment, so you know which company is coming. Home and business only.

You can describe the problem on rogerrepair.com and get one locksmith booked.