Question about GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

Auto-fan turns on too often.

While cooking after 10 min fan starts working and keeps blowing for quite some time. Seems like it's trying to cool overheated oven (microwave), but it isn't hot. This wasn't happening before. I suspect that some kind of sensor is at fault. Any suggestions are greatly appreciated. We have GE Profile Spacemaker oven which is 3 years old.

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Normally the exhaust / vent / hood fan will come on automatically if the stove top or the bottom plate of the microwave gets too hot.

Also, there may be some settings for the auto-fan that can work like this.

Consult your manual. If you don't have it, you can download GE owner's manuals and installation instructions here.

Otherwise, the hood fan thermostat may be failing. It should be normally open when you do a continuity check.

If you or someone you know wants to look into this, we have critical safety, disassembly, and troubleshooting info at our site, and our link is at our listing here on FixYa.

We even have a video on our site that shows you how to safely & easily remove the control panel assembly in less than 5 minutes so you can check out your oven.

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" hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting & testing.

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

Posted on Jul 21, 2008

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Hi I have a Panasonic NN SN 797S. works perfectly for say 20 mins and then blows a fuse. Replace the fuse and it may work for 2 days or 10 mins and then a fuse blows again. I was told the noise filter


Is the internal cooling fan working when you cook?

If not, the magnetron will overheat, and the unit will draw excessive current.

Otherwise, I would suspect the inverter.

Due to the complexity and lethal voltages used and produced in inverters, I do not recommend that an inexperienced person work on repairing an inverter.

You can find an authorized Panasonic servicer here.
In Canada, you can find an authorized Panasonic servicer here.

The service manual is here.

You can order Panasonic parts & accessories from Encompass here or you can call them toll-free at 866-779-5835.

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The power keeps shutting off


see the details and fix it. God bless you
All microwaves have some sort of a cooling fan to help keep the magnetron and controls at a tolerable level. Most OTR models will usually use the vent motor for the cooling fan also. Countertop units have a small fan behind the control panel somewhere. Either way, if the cooling fan is not working and heat builds up, it is going to open a thermostat. On some makes, this thermostat might re-set itself as soon as the temperature cools down. Other makes, you will have to replace the thermostat or fuse.
If this is your microwave oven repair problem, you will need to check the operation of the fan. Below in the component testing chart, you will see how to test the fan. Also, if possible, make sure the fan is not obstructed somehow and not turning. Also check your fan relay at your control board for voltage, if no voltage, replace control board. This fan should come on at the same time any cooking starts.

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Nov 15, 2012 | Panasonic NN-SD697S Microwave Oven...

1 Answer

Microwave shuts off after 10 seconds


see this causes and fix it. God bless you
All microwaves have some sort of a cooling fan to help keep the magnetron and controls at a tolerable level. Most OTR models will usually use the vent motor for the cooling fan also. Countertop units have a small fan behind the control panel somewhere. Either way, if the cooling fan is not working and heat builds up, it is going to open a thermostat. On some makes, this thermostat might re-set itself as soon as the temperature cools down. Other makes, you will have to replace the thermostat or fuse.
If this is your microwave oven repair problem, you will need to check the operation of the fan. Below in the component testing chart, you will see how to test the fan. Also, if possible, make sure the fan is not obstructed somehow and not turning. Also check your fan relay at your control board for voltage, if no voltage, replace control board. This fan should come on at the same time any cooking starts.


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We have just purchased a Kenwood microwave/combination oven and are concerned there may be a problem. When the food has finished cooking and the microwave beeps it seems there is a fan or something still...


In most modern combination microwave ovens, if not all, there is a fan that comes on after use to cool the magnetron and cavity down. This is quite normal but if you still have doubts, contact Kenwood's web site and send them a question.
Hope this halps to put your mind at rest.

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I PUT A POTATO IN FOR 6 MIN. AND AFTER ABOUT 2 MIN. IT SHUTS DOWN AND A MIN OR SO LATER IT STARTS UP AGAIN ,BUT THE TIME STILL COUNTS DOWN AND THE TURNTABLE IS STILL TURNING, AND YESTERDAY I HAD TO UNPLUG...


it sounds like it is overheating. but if only stops for a minute or so dont know if that would be enough time to cool off.When you start it up can you hear the fan running? does it keep running when it shuts down? if it's not running then thats the problem If the fan is running and shuts down when it shuts down then try shaking the door when you start it up the next time or you can try it the first time just to eliminate it being a faulty interlock switch. let me know about what you find about these two ideas.

Sep 02, 2009 | Sanyo Microwave Ovens

1 Answer

Fan keeps running


Neither the owner's manual nor the quick start guide for this model addresses that specifically, but most commercial microwaves do work this way to ensure proper cooling.

The manual does state that when you open the door then close it, the light and fan will stay on for an unspecified period of time.

If the word "HOT" appears in the display, the magnetron is overheated and the fan will run until the temperature is brought down.

If the fan fan NEVER shuts off, then there may be a stuck relay or defective sensor.

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

Nov 06, 2008 | Microwave Ovens

1 Answer

GE JVM1870 Spacemaker Microwave Fan Malfunctioning when Cooking


There are two different fans in this model, as with almost all over the range microwaves.

One is the hood vent exhaust fan, which you can turn on and off at will, and which should always be on when cooking on the stove top.

This fan does not automatically come on when you cook with the microwave.

The fan which should always be on (automatically) when you are microwaving is the internal magnetron cooling fan.

If the cooling fan fails, the magnetron can overheat and the thermal cutout (TCO) / thermostat will open, killing the power to the oven. Ideally, this protects the magnetron from being destroyed.

If the thermal device is a thermostat, it will reset when it cools down, and the oven will work.

If the thermal device is a true thermal fuse, it is a one-time device and if it blows, it will have to be replaced.

If your cooling fan is bad, it needs to be replaced before using the microwave.

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" hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting & testing.

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

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1 Answer

Fan problem


So is it cooking okay?

I would guess that your hood thermostat is failing.

The hood thermostat's job is to turn on the exhaust / vent / hood fan whenever the temperature above the cooktop gets too high.

A thermostat can only trip so many times before it starts to fail. Then it may come on by itself from time to time then finally stay on permanently.

If you or someone you know wants to look into this, we have critical safety, disassembly, and troubleshooting info at our site, and our link is at our listing here on FixYa.

We even have a video on our site that shows you how to safely & easily remove the control panel assembly in less than 5 minutes so you can check out your oven.

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" hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting & testing.

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

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2 Answers

GE Profile Spacemaker keeps asking for time date reset and will not operate


The power to the unit is drooping (when the heavy microwave load kicks in) causing the reset.
Try plugging it into a different outlet (whole different circuit if possible) and if that works then you have a wiring problem to the original outlet.

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