How to Fix a Microwave Turntable Not Turning

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AtoZ
July 31, 2024
Microwave Repair

Microwaves are relatively fuss-free appliances; they rarely break down and can last for decades without any issues. One problem that can occur, however, is a malfunction of the turntable mechanism. If your microwave turntable isn’t turning, our guide has you covered. Try these fixes to get it up and running again!

Note: Working with the internal components of microwaves can be dangerous, as parts can retain charge even when unplugged. Make sure you only attempt repairs to your microwave if you’re confident you know what you’re doing. It’s also important to consider the age and cost of replacement, as microwaves tend to be a relatively low-cost appliance, it may be simpler to just replace the entire appliance. 

Microwaves are usually expected to last about seven years, or less if they’re subjected to heavy use. If your microwave is getting close to this age, replacement may be the better option, as it is likely to experience further issues even if you fix the turntable malfunction. 

Check the power supply

First things first – you need to determine that the turntable is the issue. If the turntable is at fault, then other functions in the microwave will still be working. 

  • Check the display. This should still be working – if not, it’s likely a power issue. 
  • See what happens when you try to start the microwave. If the light comes on and it heats but doesn’t spin, the turntable is the issue. If nothing happens, then there may be a larger electrical problem. 
  • Check the door mechanism. Sometimes a microwave won’t operate properly if there’s an issue with the door latch, so ensure that the latch shuts firmly. 

Once you’ve ruled out other issues, you can move on to pinpointing the fault with the turntable.

Check for obstructions

If food, debris, or a loose part obstructs the turntable, it won’t be able to function properly. Here’s how to check:

  • Unplug your microwave.
  • Remove the turntable tray and the roller ring. Thoroughly clean the tray, especially the part that fits onto the turntable itself. Wipe the roller ring with a damp cloth, paying special attention to the rollers. 
  • Check the turntable mechanism for debris or obstructions. Clean the entire area thoroughly to make sure no grime or debris can impact its movement. 
  • Once all the parts have been thoroughly cleaned, put the roller ring and the turntable tray back in place, ensuring that they are positioned correctly. 
  • Place a microwave-safe container in the microwave and run a test to see if the turntable is now spinning. If not, move on to the next step in this guide. 

Inspect the turntable motor

If the turntable tray and all the external parts appear to be working normally, there may be an issue with the turntable motor. A damaged or worn motor will need to be replaced so that your microwave can function properly – here’s what to do:

  • Unplug your microwave. 
  • Remove the outer panels to access the motor. Consult your manual for specifics on your model. 
  • Locate the motor – this will be in the space beneath the main microwave cavity. 
  • Disconnect the faulty motor, including the wiring harness and the drive coupler. Before you remove it, take a picture to help you connect the new one. 
  • Source a replacement motor which meets your microwave’s specifications. Put the new one in place, ensuring it is hooked up to the wiring and held in place firmly. 
  • Put your microwave back together.
  • Restore power and run a test to see if the turntable is spinning properly. If not, check the next steps in this guide. 

Replace the drive coupler

Another part that can affect the operation of your microwave’s turntable is the drive coupler. This part connects the turntable motor to the turntable and if it’s damaged or misaligned it will prevent the turntable from functioning. Here’s what to do:

  • Unplug your microwave.
  • Remove the outer casing to access the drive coupler. Consult your manual if you’re unsure of the exact location – in most models, the coupler can be found underneath the bottom of the interior cavity. 
  • After removing the cover and locating the coupler, inspect it carefully. It should be obvious if it’s damaged or not. If it appears cracked, warped, or damaged in some way, it will need to be replaced. 
  • Purchase a replacement coupler that is compatible with your model of microwave. 
  • Remove the old coupler. It may be held in place with clips or screws depending on the model of microwave you own. 
  • Discard the old coupler and put the new one in place. 
  • Put your microwave back together and restore power. 
  • Run a test to see if the turntable is rotating as normal.

Replace the drive pin

Another small part that can fail and prevent the turntable from spinning is the drive pin. This is a small pin that connects from the motor chest to the drive coupler and if broken or misaligned will prevent turning. This can become broken through normal wear and tear, or become dislodged by force, such as rough handling of the microwave while moving. Here’s what to do:

  • Unplug your microwave from the power source. 
  • Remove the necessary panels to locate the turntable motor and drive pin, consulting your manual as necessary. 
  • Check for the drive pin. If it’s broken, half of the broken pin may be still inside the motor shaft. Carefully use needle-nosed pliers to remove the broken piece. 
  • Source a replacement drive pin, ensuring it’s the same size as the broken one. 
  • Put the new pin in place so that it is securely held in the motor shaft.
  • Put your microwave back together.
  • Restore power and run a test cycle to see if the microwave is functioning normally. 
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