Microwave Door Not Closing? Latch and Spring Fixes

When a microwave door is not closing or sealing, the door switches never trip and the unit will not run. Usually, a worn latch assembly or a broken torsion spring is the cause. First, check that the latch hooks are intact. Then, inspect the latch and springs below.

Safety first. Unplug the microwave before you open the cabinet. The high voltage capacitor can hold a lethal charge long after you unplug the unit, so it must be discharged before any internal work. Because of this shock hazard, leave the magnetron, high voltage diode, and capacitor to a qualified technician. Never run the microwave empty.

Parts to inspect for a microwave door that will not close

1. Door Latch Assembly

When the door will not close, a worn latch assembly is the first thing to check. The door latch assembly holds the door closed and trips the door switches. When the latch or its hooks wear or break, the door does not seat and the microwave will not run. So inspect the hooks and springs for wear and clean breaks. Replace the latch assembly if it no longer holds the door or trips the switches.

Unplug the microwave before you reach this part, and have the high voltage capacitor discharged first, since it can hold a lethal charge even when unplugged.

2. Torsion Springs

The torsion springs on a drop-down door balance the door so it holds position and closes flush. When a spring stretches or breaks, the door sags, hangs open, or slams. So inspect both springs for even tension and clean ends. Replace the springs as a pair so the door stays balanced.

Unplug the microwave before you reach this part, and have the high voltage capacitor discharged first, since it can hold a lethal charge even when unplugged.

Check the hooks and springs

Before you order parts, inspect the door. First, look at the latch hooks that poke into the frame and make sure none are broken. Then, check the torsion springs at the hinge for even tension. Because a cracked hook or a stretched spring is the usual cause, this look tells you whether to replace the latch, the springs, or both.

Get the parts

We supply OEM and replacement parts in bulk. Browse the Appliance Parts catalog, or request a bulk quote for volume orders.

Is the microwave old or failing often? So weigh a repair against a new unit, and browse complete microwaves and more when a replacement makes more sense.

Most of the time, a microwave door that will not close traces back to one worn part. So replace it, then run a short test with a cup of water and confirm the fix.