Know your hinges and closers
- Cam-lift (gravity) hinges: the door rides up a ramped cam as it opens and drops back down to close itself. Common on reach-ins. A worn cam stops the door closing.
- Spring-loaded hinges: a coil or torsion spring inside the hinge pulls the door shut. Tension is sometimes adjustable.
- Separate door closers: a spring or hydraulic arm at the top or bottom of the door, more common on larger cabinets and cold room doors.
- Hold-open stops: a detent that keeps the door open at about 90° or more for loading. Worn stops let doors swing into walls or other equipment.
- Drawer runners on undercounters work differently; their equivalent problem is a drawer that does not close fully.
What the symptom tells you
| Symptom | Likely cause | First step |
|---|---|---|
| Door rubs the frame on the handle side | Door sagging; loose top hinge or worn bottom hinge bush | Tighten hinge screws; check bush |
| Door does not close the last few centimetres | Weak closer, worn cam, cabinet leaning forward | Level cabinet; check closer and cam |
| Door swings open on its own | Cabinet leaning forward or to hinge side | Level cabinet |
| Door slams hard | Closer spring too strong or hydraulic damper failed | Adjust or replace closer |
| Gap at top corner of handle side | Door twisted or sagging | Adjust hinge, then paper test |
Check the cabinet is level first
Before adjusting anything on the door, put a spirit level on the cabinet. A unit that leans forward will let a perfectly good self-closing door drift open, and one that is twisted will make the door appear to sag. Levelling fixes a surprising number of door problems on its own. If the unit sits on castors, check none has come loose.
Tightening and shimming hinges
- 1. Isolate power if the door has wiring for lights, heaters or a door switch.
- 2. Support the weight of the door — have a second person hold it or wedge it gently from below with a soft block.
- 3. Tighten the hinge mounting screws on both the cabinet and door sides. Do not overtighten into thin steel.
- 4. If a screw spins without gripping, the thread has stripped. Do not force a bigger screw; ask a technician to fit a threaded insert or rivet nut.
- 5. If the door still sags, the bottom hinge bush or pin may be worn. Replacement bushes are inexpensive and restore the door's height.
- 6. Some hinges allow shimming with thin washers to raise or move the door. Use the manufacturer's shims or stainless washers, never cardboard.
- 7. Close the door and do the paper test all the way round.
Adjusting door closers
Spring hinges and arm-type closers often have an adjustment screw or a series of tension holes. Follow the manufacturer's instructions exactly: a loaded spring can release suddenly and injure fingers. Increase tension in small steps until the door closes reliably from about 30° open, without slamming. Hydraulic closers that leak oil or close at uneven speed should be replaced rather than adjusted.
On cam-lift hinges there is no adjustment; if the door no longer rises and falls cleanly, the cam is worn or cracked and should be replaced.
Habits that prevent hinge wear
- Do not hang heavy items on door racks beyond what they are designed for; extra weight drags the door down.
- Train staff not to swing doors into walls or kick them shut.
- Use the hold-open stop when loading instead of propping doors with crates.
- Keep hinges clean and dry; mop water and sugary spills corrode pins and bushes.
- Check hinge screws monthly on the busiest units.
When to call a technician
Call for service if the hinge mounting has torn out of the cabinet, if a glass door needs adjusting (glass is heavy and fragile), if the door has heater or lighting wiring that passes through the hinge, or if reversing the door swing is needed. These involve removing the door, which on a glass or wired door is a two-person job with risks to both the door and the people.
Safety notes
Isolate power before working on doors with wiring. Support doors while hinge screws are loose — a falling stainless or glass door can cause serious injury. Keep fingers clear of spring closers. Door work does not involve the refrigeration circuit, but if panels must come off near pipework on units using hydrocarbon refrigerants, leave it to a technician trained for flammable refrigerants.
Frequently asked questions
- Can I reverse a refrigerator door to open the other way?
- Many solid-door reach-ins are designed to allow it, using the manufacturer's kit and instructions. Glass doors and doors with wiring are best left to a technician. Check before buying if you need a specific swing.
- Should I oil the hinges?
- Use only a small amount of food-safe lubricant if the manufacturer recommends it. General-purpose oil attracts dirt and can drip onto food or gaskets.
