Question about GE JVM1850 1000 Watts Microwave Oven

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Can I just disconnect the motor and operate the oven without it

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You must have the fan running to cool the magnetron tube. It would burn up in short order without the fan.

Posted on Oct 06, 2009

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Posted on Jan 02, 2017

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My over the stove microwave starts continues for a few econds the f-7 appears and it stops


F7 means power to magnetron is interrupted.

I don't recommend that someone without experience and an understanding of the safety procedures undertake troubleshooting this.
You can find manuals and helpful exploded view diagrams for your model here and my favorite parts supplier is here. There is a technical sheet hidden behind the controls that has helpful technical and troubleshooting information. It will say something like this:

F7 Power to magnetron interrupted

1. Unplug microwave oven or disconnect power.
2. After 40 seconds, check to see whether this solves the problem.
3. Unplug microwave oven or disconnect power.
4. Check cooling fan operation
5. Check the magnetron.
6. Check P65 connection on the relay control board.
7. Check the P56/P66 connection between relay board and relay control board.
8. Check wiring to the 1200W inverter and control system. See "Checking Inverters."
9. Check operation of all interlock switches.
10. Replace all parts and panels before operating.
11. Plug in microwave oven or reconnect power.
12. Check voltage at 4903-1 on relay board. If it is 120, unplug microwave oven or disconnect power.
13. Replace inverter.
14. Replace all parts and panels before operating.
15. Plug in microwave oven or reconnect power.
16. If problem persists, unplug microwave oven or disconnect power.
17. Replace relay control board.
18. Replace all parts and panels before operating.
19. Plug in microwave oven or reconnect power.
20. If problem persists, unplug microwave oven or disconnect power.
21. Check for reversed plug connection on controls or loose wiring.
22. Replace all parts and panels before operating.
23. Plug in microwave oven or reconnect power.

William E. Miller, AS-EET
http://www.MicrowaveControl.com
Microwave Oven Control Panel Repair Nationwide
"Recycling by repairing since 1982"

Oct 05, 2016 | Kenmore Microwave Ovens

Tip

Replacing a Turntable Motor on a Microwave


The following advice is for MOST microwave ovens (including over-the-range models). This is a fairly simple repair that can be accomplished without uninstalling the microwave oven.

If the turntable motor has failed, it can be replaced by following these steps:

1. Unplug the microwave.

2. Open oven door and remove glass tray and carousel ring.

3. Locate and remove the screws holding the bottom panel (under the microwave) in place. With the screws removed, the bottom panel should open from the front with the hinges in the back.

4. Disconnect the connector plug from the turntable motor.

5. Reach inside the oven and remove the coupler. This is the small plastic piece that the center of the glass tray sits on. You may have to gently pry up with a flat screwdriver to get it to come loose, then pull straight up.

6. With the coupler removed, loosen the mounting screw(s) to the motor and it should easily come out from under the oven.

7. Install new motor in the reverse order of the steps I just provided.

There are many appliance parts websites that carry replacement parts cheaper than retail. The average cost for most of these motors is about $30. Prices do vary depending on model number. I hope you find this information helpful.

on Dec 01, 2009 | Microwave Ovens

1 Answer

GE microwave oven squeals as carousel is rotating. Noise stops in a minute or so but begins anew when the unit is used again.


If it is the wheel on the turntable that squeels, wash the turntable in strong solution of washing up liquid and water.
If it does it without a turntable fitted, change the turntable motor.

Replacing the turntable motor.

The motor assembly is fixed to the base of the oven usually with two screws and access i obtained by removing the inspection plate directly beneath the motor. It is usally a plug in synchronus motor that revolves at a few revs per minute but the plastic cogs in the motors gear box fail and the motor assembly must be replaced. They are fairly inexpensive and obtainable usually from a domestic appliance repair shop.
If you feel confident, disconnect it from the mains power, remove anything in the cavity and turn it upside down if it is a tabletop model, a little more complicated if it is built in!
Remove the inspection plate and disconnect the motor. Remove the motor and go and get a new one. Re fit it and put the microwave back in its position. Plug it back in, with the turntable and plate. Put a cup of water on the plate inside of the oven and heat for 20 seconds to check the plate goes round.
Hope this helps.

Jan 01, 2011 | General Electric Microwave Oven

1 Answer

I have a ratteling noise from the motor that spins the fan next to the overhead light inside the microwave. when i disconnect the motor the noise goes away. How important is this little fan?


That "little fan" is the Microwave "Stirrer" without it the magnetron will burn out real quick. Due to the microwave being reflected back. That "Fan" scrambles up the MW, and scatters it in the chamber.

Feb 15, 2010 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

I have a ge spacemaker over the range microwave oven model number jvm1631bj02 and it blows fuse after fuse and seems to blow right before the fan would engage within the first couple of seconds


Sounds like you have a shorted fan motor. Disconnect the power going to the fan and then try turning the microwave on again. Do not run the microwave for more than 5 or 6 seconds without the fan operating. If this does not cure your problem then the next most likely problem is either the AC Capacitor (silver can), or the Magnatron (4 inch square silver unit with cooling fins and thick wires. The voltage present on these two units can hold a charge in excess of 5000 volts, even after a time it is unpluged. Don't go near these unless you know what you are doing.

Best of luck.

Jan 20, 2010 | GE Microwave Ovens

1 Answer

Turnable plate isn't working


in order to be 100 % sure
you would have to check voltage to the motor while its suppposed to operate
take off the bottom 6 screws, you might need whats called a safe t, a torque wrench or star with a hole
most use phillips,
drop the bottom, you should see the turn table motor
disconnect the two leads and connect them to a voltmeter,,,
turn the unit on
you should read voltage to the meter
if not the problem is in your control board and will need to be replace
if you do read voltage and the motor is not turning
you will need to replace the actual motor
either way its a pretty simple repair and can be done without taking the unit dwon

Oct 24, 2009 | GE XL1800 1100 Watts Microwave Oven

1 Answer

RVM1435 Turntable not working


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.

Aug 15, 2009 | Hotpoint RVM1435 Microwave Oven

1 Answer

Works for approx 30 secs then it cuts off with a error Code F7 message.


Assuming yours is a model KHMS2050SSS0, here is what the technical sheet says about the F7 error code:

1. Unplug microwave oven or disconnect power.
2. After 40 seconds, check to see whether this solves the problem.
3. Unplug microwave oven or disconnect power.
4. Check cooling fan operation
5. Check the magnetron.
6. Check P65 connection on the relay control board.
7. Check the P56/P66 connection between relay board and relay control board.
8. Check wiring to the 1200W inverter and control system. See “Checking Inverters.”
9. Check operation of all interlock switches.
10. Replace all parts and panels before operating.
11. Plug in microwave oven or reconnect power.
12. Check voltage at 4903-1 on relay board. If it is 120, unplug microwave oven or disconnect power.
13. Replace inverter.
14. Replace all parts and panels before operating.
15. Plug in microwave oven or reconnect power.
16. If problem persists, unplug microwave oven or disconnect power.
17. Replace relay control board.
18. Replace all parts and panels before operating.
19. Plug in microwave oven or reconnect power.
20. If problem persists, unplug microwave oven or disconnect power.
21. Check for reversed plug connection on controls or loose wiring.
22. Replace all parts and panels before operating.
23. Plug in microwave oven or reconnect power.

(This troubleshooting guide presumes one does not know how to test electronic components. That's why they say to replace and part and check it again.)

You can find helpful exploded view diagrams and order parts by entering your full model number from the tag on the oven here.

If yours is a different model number, please reply back.

May 26, 2009 | KitchenAid KHMS2050SSS Microwave Oven

1 Answer

Whirlpool microwave oven


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.

It says:

F7 Power to magnetron interrupted

1. Unplug microwave oven or disconnect power.
2. After 40 seconds, check to see whether this solves the problem.
3. Unplug microwave oven or disconnect power.
4. Check cooling fan operation
5. Check the magnetron.
6. Check P65 connection on the relay control board.
7. Check the P56/P66 connection between relay board and relay control board.
8. Check wiring to the 1200W inverter and control system. See “Checking Inverters.”
9. Check operation of all interlock switches.
10. Replace all parts and panels before operating.
11. Plug in microwave oven or reconnect power.
12. Check voltage at 4903-1 on relay board. If it is 120, unplug microwave oven or disconnect power.
13. Replace inverter.
14. Replace all parts and panels before operating.
15. Plug in microwave oven or reconnect power.
16. If problem persists, unplug microwave oven or disconnect power.
17. Replace relay control board.
18. Replace all parts and panels before operating.
19. Plug in microwave oven or reconnect power.
20. If problem persists, unplug microwave oven or disconnect power.
21. Check for reversed plug connection on controls or loose wiring.
22. Replace all parts and panels before operating.
23. Plug in microwave oven or reconnect power.

If for some reason your tech sheet is not there, you can download it here.

We regularly repair control units for customers nationwide by mail for $39.95 postpaid in about a week with a one-year guarantee.

Feel free to contact me directly (and please remind me of your full model number) for more information & help.

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

William E. Miller
prototech@usa.net
http://www.microwavedisplay.com

Nov 30, 2008 | Whirlpool GH4155XP Microwave Oven

1 Answer

Microwave F-7 Code


F7 is q Power to magnetron
interrupted

1. Unplug microwave oven or disconnect power.
2. After 40 seconds, check to see whether this solves the problem.
3. Unplug microwave oven or disconnect power.
4. Check cooling fan operation
5. Check resistance of the magnetron thermostat.
6. Check the magnetron.
7. Check P2, P4 and P27 connections.
8. Check wiring to the 1100W inverters and control system. See
“Checking Inverters.”
9. Check operation of all interlock switches.
10. Replace inverter, if defective.
11. Replace all parts and panels before operating.
12. Plug in microwave oven or reconnect power.
13. If problem persists, unplug microwave oven or disconnect power.
14. Replace electronic control.
15. Replace all parts and panels before operating.
16. Plug in microwave oven or reconnect power.
17. If problem persists, unplug microwave oven or disconnect power.
18. Check for reversed plug connection on controls or loose wiring.
19. Replace all parts and panels before operating.
20. Plug in microwave oven or reconnect power.

Aug 08, 2008 | Whirlpool GH6177XP Microwave Oven

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