Micro spacemaker XL 1800 does nothing like not getting power not at panel or or outlet there good

probably fryed the magnetron, with something like foil or metallic, try unplugging it for 12 hours maybe it will reset if not throw it out

I'm betting your base model number is JVM1860, JVM1861, JVM1870, JVM1871, JVM3660, or JVM3670.
That's the automatic louver you're having trouble with. There are micro switches in the louver assembly which tell the controller when the louver is open or closed.
If one of those switches or the louver motor fails, the louver will not work correctly.
Did your cooktop lights recently fail?
Sometimes the surge from them shorting will cause damage to the circuit board, which can be repaired.
There should be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, testing, and locating components.
There is a video here showing how to remove a typical over the range control panel assembly in under 5 minutes.
You can find helpful exploded view diagrams and order parts by entering your full model number from the tag on the oven here.

Check fuse. If bad test the door switches. Replace bad one and then the fuse.

https://www.manualslib.com/products/Ge-Jvm3670wf-Profile-Spacemaker-Xl-1800-36-Microwave-Oven-1842926.html

Click link to download manual

Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101 =-=-

It sounds like the main transformer has failed. It would be cheaper to replace the whole microwave than repair this one. Sorry to be the bearer of bad news. Hope this helps. Good luck.

You likely need to replace the fan motor.

check fuse inside unit microwave has a fuse around 15 to 25 amps get at local hard ware store u should discharge capacitor before installing fuse not nessary in microwave

Yes the main fuse has blown for several different reasons. If you have no electrical know how, or experience using a multimeter you really should have a pro take a look at it. It could be anything from a bad capacitor, a bad High Voltage diode, a bad door switch or maybe even a bad magnetron or a control panel. Not really a job for a novice to attempt, as the main AC fuse will not blow for no reason. Good Luck

On a GE microwave F3 means you have a failed keypad.

We replace these for customers nationwide with our guaranteed $39.95 service.

If you might want to replace it yourself, I have uploaded a handy guide with pictures showing you what's typically involved. It's here.

Please feel free to contact me directly if you need more help.

We're happy to help and we appreciate your thoughtful rating of our answer.

William E. Miller, AS-EET
[email protected]
http://www.microwavedisplay.com