A microwave turntable that won't spin is one of the most fixable appliance problems there is — most causes are things you can check in under a minute without any tools, and the food still heats either way (it just won't cook evenly). Here's the order a tech works it, easiest first.
The glass tray sits on a roller-guide ring and a center hub. If the tray isn't seated on the hub, or the roller ring is out of place or dirty, it won't turn.
Check it: Take out the glass tray and the roller ring, wipe the floor of the microwave and both parts, and set them back so the tray clicks onto the center hub and sits on the roller ring. This fixes most cases.
Spilled food or a bit of hardened debris under the tray blocks the roller ring from turning.
Check it: Clean under the tray and around the center hub so nothing is jamming the ring.
The small plastic coupler on the center hub that the tray locks into can wear out or crack, so the motor turns but the tray doesn't.
Check it: Check the center coupler — if it's cracked or stripped, it's a cheap part to swap on many models. A tech can confirm.
The small motor under the floor of the microwave that drives the hub can fail.
Check it: If the tray, ring, and coupler are all good but nothing turns, the turntable motor has failed — an affordable part. (On a cheap countertop unit, weigh it against a new microwave.)
Almost always repair (or free) — most no-spin is just reseating the tray and ring or cleaning a jam. A coupler or turntable motor is an inexpensive part. On a cheap countertop microwave, a motor repair may approach the price of a new one, so weigh it; on a built-in or over-the-range unit, repair usually wins.
In Middle Tennessee or the Baton Rouge area? We'll come to you, same-day. Anywhere else in the U.S.? Send a 10-second video, a real technician tells you exactly what's wrong for $50 (credited toward the repair), and we ship you the exact part. 24/7 — text, call, or upload anytime.
Most often the glass tray or the roller-guide ring under it is out of place or has food jamming it. Take both out, clean under the tray and the center hub, and reseat the tray so it clicks onto the hub and rides on the roller ring. If it still won't turn, the drive coupler or the turntable motor has failed — inexpensive parts.
Yes — it still heats, it just won't cook as evenly, so stir or rotate the food partway through. But it's usually a quick, cheap fix worth doing.
On a built-in or over-the-range microwave, usually yes — the motor is inexpensive. On a cheap countertop unit, the repair can cost close to a new one, so weigh it. Either way, check the tray, ring, and coupler first — those are often the free fix.