What model microwave replaced the JVM3660 SM model?

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.

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.

I would check door switches first. That's any easy fix. See my help file here.
The service manual reprint would be either SM-MQ8797BW or SM-MQ8797BH. They may be close enough to troubleshoot electrical trouble, with the only real difference being trim or color, etc.
You can order Quasar parts from Encompass here or you can call them toll-free at 866-779-5835.

Click below for the manual: (see page 29)

Manual

Hope this helps

Zeppelinx12

The circuit board must be replaced.

You can remvoe the bottom of the microwave without taking it off the wall. This page talks about this problem. http://www.appliance-repair-it.com/microwave-turntable.html

Hello :

F-3 error is an error code for a bad keypad . If you couldn't find the spare parts , then it will be cheaper to replace the microwave.

good luck .

please rate !

First of all, you must be sure you are using a microwave safe container. If it is not marked as such, it is not.

Try heating a cup of water in a clear glass container. If it still does not work right, your stirrer may be bad.

You can usually find helpful exploded view diagrams and order parts by entering your full model number here.

There should also 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.

At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

LIGHT BULB

I have a diagram at my site which helps you find & replace many GE cooktop and cavity light bulbs. It's at http://207.234.249.73/mwd/ge_lamp_replacement.jpg

If there's no obvious removable cover over the bulb (most often on the rear or side) and the owner's manual doesn't address it, then disassembly will be required.

Bulbs can be had in most grocery stores, hardware stores, home improvement centers, and big box or department stores.

Many models use halogen lamps. You must not touch the new one with your bare skin, as the oils will shorten the bulb life.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

First, Unplug the microwave. Remove the top housing or cover from the unit by removing just the screws holding the cover on.Most of the screws will be philips head.Sometimes manufactures will use quarter inch hex or torc head screws.From the rear of the cover, lift up and pull back to remove.CAUTION:BE CAREFUL NOT TO TOUCH ANYTHING IN THE HIGH VOLTAGE SECTION.You can then locate the lamp and replace it.Always use the same wattage lamp when replacing.Remember, when reinstalling the top cover, you must slide the top and side guides into place located at the front inside cover. Use two people if possible, it makes it alot faster.Then reinstall all screws.Do not overtite.Then your ready for use.

Remove the grill, should be screws on the top of the unit. There should be one screw behind the grill at the top of the control panel. Remove it and pop the control panel up to remove it. Make sure the mw is unplugged first. Then you can remove the board.