Motor works but doesnt turn spindle with blade on it

probably the belt from blade to motor

My guess is that the spindle is cracked at the bottom; it will turn by itself, but can not move the tray. You can check that by dropping the bottom plate (with the lights), and taking off the drive motor. It could also be the motor itself; it has very small plastic gears inside which break easy, especially if you put heavy things in the oven.

It sounds like you're talking about the coupler on the stirrer motor.

On some models, it available separately, but on some, you have to order a new stirrer motor.
You can find links to helpful exploded view diagrams and part ordering help here.

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The turntable motor can be replaced by following these simple steps:

1. UNPLUG the microwave before servicing.
2. Locate and remove the screws around the perimeter of the bottom panel of the microwave (located UNDER the microwave bottom).
3. With the screws removed the panel will open, exposing the turntable motor. Remove the glass tray and reach inside the oven cavity and grasp the turntable spindle. Pull straight up to remove it from the motor shaft.
4. With the spindle removed, disconnect the motor connector plug and mounting screws.
5. Insert new motor and reinstall everything using the steps provided in reverse order.

If you have any questions, please let me know. I hope this helps you.

NOTE: If this microwave is mounted, this repair can be performed without uninstalling the oven.

turn table motor may be going bad.. it is almost impossible to diagnose untill it stops working completely.. when it stops working completely you can test for 120v down at the motor if you get 120v you need to replace the motor.

Remove the glass table and watch the drive spindle to see if it is turning when the unit runs; just put a cup of water so the magnetron is not without load, they can be damaged otherwise.
If it doesn't turn, gently try to turn the spindle with your fingers.  If it turns manually, then the motor has failed. If it doesn't, then some foodstuff has managed to freeze the spindle.
In the latter case, pull the plug from the wall, use some foaming cleanser (it's less wet) and try to get some under or around the spindle. Let it soak overnight, then try to turn the spindle with your fingers again.  If it's now free, mop up and remove as much of the remaining cleanser as you can, leaving the table out, put a cup of water or preferably a bowl with more volume, in the unit, let it run for some minutes to try to dry the rest of the cleanser out.
Put the table back in to see if it will now turn.
If this doesn't work, it will be necessary to replace the motor.  Since this is a unit I don't know, I can't predict if it is a DIY project or not and the dealer may ask an unrealistic price for the replacement.     

I have had the turn table motor go defective in microwave ovens.

Normaly, before ordering a new motor, I always checked to make sure that there was power going to the motor assembly. I never had a power drive failure to a motor so-far. When they did not spin, the motor was defective. But, one day there will be a first time for me.

The fix was to purchase a new motor from the manufacture and install it. In some cases, I had to also replace the spindle key because the original broke when trying to remove it when removing the motor assembly.

I suggest that for servicing a microwave oven, you give it out to a service center to have the work done. There are safety issues when working on microwave ovens.

Jerry G.

Test the motor fan - unplug the oven, wait 5 minutes and discharge the capacitor. remove the oven housing.  First check for any obstructions that may be preventing the fan from rotating.  Turn the blades by hand: if they don't move easily, disconnect the wires from the motor and take out the motor for cleaning and lubrication.  if the fan blades move freely, check for a burning smell and examine the motor windings for discoloration.  If a wire is loose or broken, repair the wire connection.  To test the motor for less visible damage, set a multitester to test resistance.  the motor should have low resistance.  If not, replace it. 

It sounds like your turntable motor may be going bad. It is located UNDER the carousel and easy to get to by removing a few screws from the bottom of the oven. You can try running the oven without the carousel tray and watch the spindle to see if you can detect the same jerking motion. This would confirm the motor has a problem. If the spindle runs smoothly with no weight on it, but begins to jerk with the carousel placed back on it, the motor could still be bad, but you may also have a spindle that is slipping. In either case, replacing both would probably be a good idea just to be sure. Make sure you place a glass of water on one corner of the oven. It's not recommended to run a microwave oven empty. If you determine the motor is defective and want to replace it, make sure you unplug the oven and remove the bottom panel of the oven. There should be a couple of wires connected to the motor and the spindle just pops off from the inside of the oven cavity. It's a fairly simple repair job and will run about $30-$40. Let me know if this helps.