Help!! I was cleaning my microhood

Sounds like the internal cooling fan may be stuck or defective. This will cause the micro to overheat which intern trips an internal heat safety. Once it cools down it will try to start again and repeat the same problem. Cooling fan is usually near the back behind the control panel.

Be very careful around microwaves they have very high voltage inside them that can be deadly. As for the control panel its very common for grease and oil to get behind the plastic film of the control panel, once it does the buttons will stop working since the grease insulates the contacts. Unplug it from the power, let it sit for 60 minutes to make sure all power from the high voltage caps has dissipated. Get access to the back of the control panel. You will probably have to peel back the control plastic on the front to get behind it. One behind clean all the buttons and contact areas. Reassemble, and it should work.

if microwave is counting down but no heat you either have a loose connection at the magnatron tube or the thermal cut out fuse that is connected to the magnatron has blown or you have a micro switch, that has failed

Door switches

If one of the door interlock switches is not switching properly or there is a condensation problem on the sensor control panel, either can cause the turntable/light/oven to come on even though the "Starts" button has not been depressed due to the wiring of the switches.
Check for faulty door switches and/or contaminated actuators.
I hope that helps.

I regularly see (and repair) this light and / or fan failure on model JVM1660SB005 and most any model of over the range microwave.
The problem is on the controller assembly, which I regularly repair very affordably.

At my Web site, you can get details, plus I have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

This light failure often occurs when a bulb goes out and the filament shorts, or when the bulbs are removed or installed without first unplugging the oven from the power line. Either can cause such a failure on the controller.

The lights can can be inoperable or stuck on or stuck in "night light" mode. Sometimes this will similarly affect the fan operation or inside light, too.

For more free DIY and other help & advice, feel free to contact me via my site.

Please include FULL model number*, FCC ID number*, + detailed symptom information. ( * on the tag in cooking cavity or around door frame or control frame or on back)

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

We see (and repair) this a lot. The problem is on the control panel, which we regularly repair nationwide by mail for $39.95 postpaid with a one year guarantee.

At our Web site, you can get details of our service, plus we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

This light failure often occurs when a bulb goes out and the filament shorts, or when the bulbs are removed or installed without first unplugging the oven from the power line. Either can cause such a failure on the controller.

The lights can can be inoperable or stuck on or stuck in "night light" mode. Sometimes this will similarly affect the fan operation or inside light, too.

You should of course replace the fuse, but always work with the oven unplugged.

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

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.



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

There is a varistor or thermostat switch mounted on the wall behind the control panel. I unpluged the leads and shorted them together. the fan and lights started working again. I got another microwave off freecycle.org for parts. I noticed a lot of sites tend to point to the control panel for a $36 to $100 board repair. Don't fall for it. H.G.

If the light and fan work then it cannot be the fuse. When the fuse "blows", it stops the electricity totally from flowing into the microwave and nothing will work or respond. The fuse is behind the control panel and this requires several hidden screws to be removed. Also, you must be very careful of the 2000 volt charge that is stored in the wiring further into the compartment behind the control panel. Therefore, do not attempt to open the micro control panel without proper service knowledge.
Because you say the light and fan operate, the fuse (as I stated ) is not your answer; most likely the problem is in the control panel circuit board. The circuit board is like any sensitive electronic component that goes crazy when there is a voltage surge that strikes it such as lighting throughout the house wiring. The board needs to be replaced unless you can have an electronic wizz-kid test is out and repair it , or just by a new board. By the way, the board is not cheap and may be difficult to locate since I understand the the manufacture stopped producing it.

I tried all the things on your website. Holding the clear button , unplugging,...

So I went back to the last operation that I was doing when the problem started.
I was using "reheat" so I put a glass of water in the micro turned on reheat 1 serving.
It started and then I hit clear after a few minutes and the problem went away.

Can you reply back with your full model number?

I'm suspecting you may have a failing keypad (membrane switch) on the control panel assembly.

We repair these for customers nationwide by mail for $39.95 plus part cost.

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: http://tinyurl.com/yzjozk

If you want to do it yourself, you can usually find helpful exploded view diagrams and order parts by entering your full model number here: http://tinyurl.com/gv383

There should also be a "mini-manual" hidden inside the unit behind the control panel, which is very helpful when troubleshooting.

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