20 Most Recent Jenn-Air JMV8208AAS Microwave Oven Questions & Answers

make this test and fix it. God bless you

1. MagnetronIf your microwave is emanating high pitched or growling noises during operation, the magnetron could be going bad. Normally a nearly silent part, the magnetron uses high voltage and induces the frequency required to cook food. Although normally not a safety hazard to operate, this is a sign that the magnetron is failing and will need to be replaced as soon as possible.
2. Exhaust fan motorIf your microwave is making a very loud humming noise during operation, it could possibly be the exhaust fan motor. If defective the part will need to be replaced to silence the appliance once more.
3. Stirrer motorAnother leading cause of a noisy microwave is an expired stirrer motor. With use this part becomes worn and makes a loud grinding noise, which is usually a leading indicator that the part needs to be replaced. The stirrer is a metal blade that is slowly turned by the motor. This action disperses the microwave energy in a random pattern, which heats the food evenly. If the stirrer motor is determined to be nearing expiration, it should be replaced to halt the grinding noise.
4. Turntable motorA very common cause for a noisy microwave is a worn out turntable motor. This is a relatively easy repair and will put an end to the noise once replaced.

I'm guessing you might mean JMV8208AAS?If so, then the service manual is at our site here.There should be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel 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. You can order Jenn Air parts here. Your problem will be either the line fuse, or one of the thermal cutouts / TCOs in the unit.In case it needs circuit board repair, see this link. We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Have you check the thermal cut off switch?

if only the size fits in, it'll match

Inside light

1. Disconnect power to oven.
2. Remove screws located in front on top of microwave securing grille.
2. Remove grille.
3. Remove screws securing bulb holder.
4. Remove light bulb

Cooktop lights

1. Disconnect power to oven.
2. Remove lamp cover or remove screws securing bottom plate cover.
3. Disconnect lamps.

If your bulb is stuck or physically broken, it can be a pain. It's sometimes tacked in place with hot glue, and sometimes there may have been enough moisture to corrode and seize up.

You could heat it up (hair dryer, maybe?) then use needle nose pliers. Be careful if heating so you don't burn anything.

You may be able to put the tips of needle nose pliers inside the broken bulb's socket, gently but firmly force the pliers jaws apart and then rotate the pliers to loosen it.

Another cool trick is to put a big glob of hot glue on the end of a stick or dowel, then shove it into the broken base and let it cool about 5 minutes, then turn the stick.

I like to put a little WD-40 or rust buster on the threads of the new bulb, too. Grease, Vaseline, cooking oil, or anything like that will work. Just a thin coat.

The lamps are available at most grocery stores, hardware stores, home centers, and places like Wal-Mart and Lowe's.

If the unit uses halogen bulbs, do not handle them with bare hands, as oils from the skin make them run hotter and shorten their lives.

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

Hello,

Investigate these three areas if your microwave won't heat food

Power Diode

A diode is an electronic component that readily passes current in one direction only and blocks the flow of current in the opposing direction. If your microwave's diode has become defective, your microwave will not heat. Test the diode to determine if this is the cause of your problem. Replace it if it is defective.

Testing a diode

NOTE: Before you test your diode, make sure your microwave is unplugged, and that you discharge the microwave's capacitor.

Whether it is shorted or open, a defective diode will most likely show some sign of defect. Defective diodes will usually emit an electrical burning smell, signifying its defectiveness. Also, it may have split in two, or it may exhibit a burned crack, or possibly even a blistered spot.

A shorted diode is indicated by a loud humming noise from the high voltage transformer, and no heat produced when a cook cycle is initiated. Whereas little or no heat produced in your microwave, with an absence of a humming noise is indicative of an open diode. In either case, the diode has to be replaced.

With your microwave unplugged, and your capacitor discharged, use extreme caution to remove the lead that leads to the capacitor. You can leave the ground connection attached. The side of the diode that goes to the ground is usually marked with a dot, stripe, or arrow. Set your ohmmeter to R x 10,000 or higher. Touch the positive meter probe to the anode and the negative meter probe to the cathode to measure the resistance across the diode terminals. Remember that the cathode is on the side that goes to the ground, which is often marked by a dot, stripe, or an arrow.

A normal diode, that is a non-defective diode, will read anywhere from 50,000 to 200,000 ohms. Differences in microwave make and model account for this large range in resistance readings.

Reverse the meter probes and measure resistance while touching the positive probe to the cathode and the negative probe to the anode. Reversing the probes like this should result in a reading of infinity. Unless a bleeder resistor is present. The presence of a bleeder resistor would produce a reading of the value of the resistor.

High Voltage Capacitor

A capacitor is an electrical device which stores electricity. A defective capacitor may be why your microwave is not heating. The capacitor will have to be tested to determine if this is the cause of your problem. A defective capacitor will have to be replaced before your microwave will work again. Make sure you discharge the capacitor before you test it, though.

Magnetron

A defective magnetron is the third possible cause of why your microwave is not heating. Test your microwave's magnetron. Replace it if it is defective.

Testing a magnetron

NOTE: Before you test this component, make sure your microwave is unplugged, and that you have discharged the capacitor.

There are two tests to conduct in order to determine whether or not a magnetron has become defective. If you receive results other than what are detailed below, you will have to replace your microwave's magnetron. Each test is described for you here:

TEST 1: Locate your magnetron and label each of the wires attached to it so that you know which wires are to be replaced where. Set your ohmmeter to the lowest resistance scale. Take a resistance measurement between each of the magnetron terminals by touching each probe to one terminal each. Reverse the probes and take a second resistance measurement. Each measurement should read less than one ohm.

TEST 2: Set your ohmmeter to its highest resistance scale. Touch one of the meter's probes to a magnetron terminal. Touch the other probe to the metal magnetron housing. Take special caution to not touch the two probes together. This could result in an inaccurate reading. This test should produce a reading of infinity - indicating an open circuit.

If you cannot perform the above task yourself, ask a family or friend that has the ability to assist you or have a certified and experienced appliance repair technician examine and replace your magnetron. This task is much too dangerous for the average layman to perform on his own.

Read the tips on the below links on how to replace your microwave oven's diode and how to discharge the capacitor.

http://www.fixya.com/support/r7088355-replace_microwave_ovens_diode

http://www.fixya.com/support/r7088317-discharge_microwave_ovens_capacitor

I hope the above is helpful.

Regards.

Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101

http://www.searspartsdirect.com/partsdirect/part-model/Jenn-air-Parts/Microwave-Parts/Model-JMV8208AAS/1266/0123370/M0506157/00003

A picture is worth a thousand words. Number 9 in the layout.

Sorry to read about your problem, I hope this helps you out.

Well first of all I would take a piece of paper or newspaper, and put it up by the vents, the paper should be sucked on by the vent.. If it does that you have suction. if it does not hold the paper, you should get a warranty repair, i am assuming this new.

If the unit is install to far above the stove you may have a issue.

But long story short, the room vented units, do not really pull much smoke, they pull better on outside venting. you are just putting smoke/steam back into the room, just a little cleaner.

I tried to help you. Please help me and Rate/Vote on my response. We take the time to answer your question. take the time to rate us.Thanks and good luck

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This is most likely the magnetron, the high voltage capacitor, or the power diode.

For an explanation on how these things are repaired, check out this website.
http://www.partselect.com/microwave+no-heat+repair.htm

If all else fails, call an Appliance Repair Technician.

Hi,
Here is a tip that will help you to figure out what is wrong with your Microwave Oven....

Microwave Oven Basic Troubleshooting Tips
http://www.fixya.com/support/r5508031-microwave_oven_basic_troubleshooting

heatman101

120volt 15watt bayonet base bulb