Question about General Electric PVM1870SMSS Microwave Oven

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No power to microwave

During defrost the microwave totally shut down. The lights came back on twice afterwards but when started again, everything shut down immediately. Tried changing main fuse and control board with no success.

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My Kitchenaide KEMC378KSS0 Oven Microwave Combo shut down.


Is it possible the cord got knocked loose during the work?

The parts list with exploded views is here.

My site is MicrowaveControl.com so feel free to e-Mail me at pupista@gmail.com for details and free advice.

Sep 27, 2016 | Microwave Ovens

1 Answer

Ge spacemaker jvm1650sh01 starts to microwave then loses power


See this FixYa solution.

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

May 27, 2010 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

Our Microwave keeps running and won't stop. It is


The fan you hear is probably the magnetron cooling fan and that, and the light, are probably both controlled by the electronics board that controls everything else. You might inquire online at Maytag or the Sears parts department to determine the cost of a replacement board but I suspect it will either not be available at all or cost 3/4 of a new microwave.

Jan 23, 2010 | Maytag MMV4205 Microwave Oven

1 Answer

Refrigertor not gettng cold enough, and now freezer is doing the same. when we turn the number to 9 you can hear it go on - but still food is defrosting. Milk in frig not getting cold enough. Refrig is...


The evaporator coil behind the cover on the back wall inside the freezer will ice up under normal conditions. Every 8 to 10 hours for around 20 minutes the defrost timer (or in most newer models the electronic adaptive defrost control) will turn the defrost heater on to melt the built up ice. There is a defrost thermostat which prevents the heater from overheating the freezer by breaking the heater circuit when the temp reaches close to 32 degrees F. The entire cooling system shuts off during the defrost cycle and starts back when the timer advances through the cycle.

If this ice is not melted it will continue to build up until the air can’t flow over the coil to circulate the cold air through the freezer and into the fridge. The temperature change in the fridge is usually noticed first followed by the freezer.

If the defrost thermostat is bad it can prevent the heater from coming on OR it won’t turn the heater off when it gets too warm. It is clamped to the evaporator coil at the top to sense the temp. If it appears to be misshapen it is bad.
With an ohm meter it should show continuity when cold and none when warm.
You can also bypass the thermostat to see if the heater comes on then. If it does then you know the thermostat is bad and needs replaced.

The defrost heater is located on the evaporator. It is in a tube which is at the bottom and can also go up the sides of the evaporator. On some types you can see a burnt spot if it’s bad. With an ohm meter it should show continuity from end to end when disconnected from the wiring in the freezer. You can also test the wiring for voltage when it’s in the defrost mode.

If you have a defrost timer you can test it. It can be located under the fridge behind the kick panel on the front. Some are in the fridge with the controls at the top. You can turn the defrost timer till it clicks and everything shuts down. The heater should now come on. If it does, replace the timer because that means the timer is not running. If it doesn't, check the heater and defrost thermostat. Turn the timer again till everything starts back up to end the defrost cycle.

If you have an adaptive defrost control instead of a timer, replace it if the heater and thermostat test good. It is located in the fridge with the controls in some models and on the back in others.

Nov 08, 2009 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

Total power loss during use


Check the voltage on the outlet,make sure it is 115v -- 122volts max, any less will cause it shut off, make sure the polarity off the outlet is correct and it is grounded,check all of your wiring connections, if all this is ok replace unit with a different unit or different supplier of unit

Jan 26, 2009 | Microwave Ovens

1 Answer

Was cooking in microwave and it totally shut off. Light went out and stopped. After a while "PF" appeared on the panel. What caused this to stop and what do I do to get it back working? My...


If it goes dead for a while during or after cooking then comes back on, the magnetron is probably overheating and causing the magnetron thermostat to open.

Then when it cools, it closes the circuit and allows power through again.

First of all, be sure the internal cooling fan is running. That's critical to protect the magnetron by keeping it cool.

You can test this by running the microwave with a cup of water inside. First, cook for about 2 minutes on the lowest power setting and see if it makes it to the end. Then cook on high for 2 minutes and see if it makes it to the end.

If the defrost test works, but the full power test does not, then the magnetron is overheating.

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.

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.

Jul 22, 2008 | GE Microwave Ovens

1 Answer

Dead microwave


You have likely blown the thermal fuse, its a small silver 1/2" pointy wire on each end and secured by clamp and normally brass crimps to the wires.
usually attached around the fan or motor area.
see this picture
http://chinafuse.en.alibaba.com/product/50391300/50098721/thermal_fuse/Thermal_Fuse/showimg.html

Jan 27, 2008 | Maytag MMV4205 Microwave Oven

1 Answer

No power Dacor DCM24SS


I do a lot of work on Dacors / Sharps. Can you describe what you mean by "shutting off"? When it was shutting off before, was it completely dead with no display and no beeps? Was iut shutting off during a cook cycle or just while setting there or what? When it would come back on or start working again, how long did it take to come back, or how did you make it come back on?

Apr 28, 2007 | Dacor DCM24SS Convection Microwave Oven

1 Answer

Microwave Steams Up, Heats Up, and Shuts off!


first of all your mwave needs to be properly ventilated .the problem is your magnetron when heated the thermal cutof switch cutts out power to magnetron.works again when cool.change magnetron

Mar 20, 2007 | GE XL1800 1100 Watts Microwave Oven

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