Top 20 Maytag MMC5000 Microwave Oven Questions & Answers

Remove waveguide cover and clean thoroughly.

Some units use a plastic or fiberglass cover over the wave guide where the microwaves are dumped into the oven cavity. If this cover gets coated with food/grease, or soaks up grease, it can arc, or catch fire. If unit is still operating properly otherwise, I would suggest replacing the cover. You need to inspect the wave guide, also, to make sure it is still intact, and there are no cracks in it that would allow microwave radiation to escape. If you need further help, I’m available over the phone at https://www.6ya.com/expert/david_29ad5d1dd86564b0

One or two of the door switches are more than likely defective.

Hi
The issue is with the door switch or the thermostat located near the turntable motor is bad and should be replaced. If it was the fuse the unit will not even work, so I believe it is the door switch and I don't think that the control can go bad. Hope this helps...please post back for further assistance.
Daniel

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heatman101

The magnetron tube inside the oven is bad have it checked

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heatman101
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HI. Your symptoms are a strong indication Magnetron failure. This is the principal heating device, that is used to produce microwaves that , essentially, excite the water molecules in the food, thus, producing the heating effect. When this device fails, generally, the unit will run, but not heat. This device is very fragile, and can injure you if you are not qualified to handle this type of component. There is a High Voltage Capacitor, that is used to help provide the necessary current for optimal Magnetron operation. This capacitor must be discharged correctly. If not, you could risk serious injury, during the repair, if it is accidental touched.

The Magnetron is linked to a cut-off fuse. If the magnetron becomes unstable, this fuse will shut the device down. It is standard procedure to have this fuse test for continuity. If the fuse has blown, this will be the culprit. Replace the fuse. Now, if the fuse continues to show continuity, this will confirm that the Magnetron has failed. I would advise to inspect the Capacitor, and HV diode for visible burn marks, or swollen top(Cap).

Access can be ac hived to these parts by removing the outside cabinet screws. Once the screws are removed, the cover can be removed, as well. Once the cover is removed, the internal components will be exposed for testing, and visual inspections.

WARNING: IF YOU ARE NOT A QUALIFIED SERVICE TECH, THIS WILL NOT BE A NOVICE DO IT YOURSELF JOB. MICROWAVES ARE VERY DANGEROUS, AND CAN CAUSE SERIOUS INJURY. I RECOMMEND TO CALL FOR SERVICE, IF YOU ARE UNCOMFORTABLE WITH HANDLING THE CAPACITOR, OR MAGNETRON.

Hi,
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heatman101

It sounds like the magnetron may have either failed or is not being supplied with the extremely high voltage required to run it.

YOUR SAFETY IS PARAMOUNT

This is a job for a professional but if you are safety clued up, here's instruction.
Make sure the !!!!capacitor is discharged!!!!! before attempting any sort of repair.
Check the door interlock switches first then the high voltage diode with either an AVO model 8 or moving coil meter on high resistance range for short circuit, (DVM's won't show the fault!), the capacitor can fail and go short circuit, the feed fuse on the primary of the high voltage transformer and then finally, the magnetron is best checked by substitution.
Hope that helps.

Usually when it doesn't het there is a problem with either the magnetron or one of the power tranistors. You would have to get a shop to tell you what the problem is as it can be a few things. If you have warrenty either maytags or from the store just find out from the store/maytag where the repair depot is. They will either repair or replace it. If no warrenty then don;t do anything without getting an estimate. It may be just as cheap to buy a new microwave.

check if the smell is coming from within the cabin. If so due to non usage of food covers some food particles ccould have got stuck while on heat to the sides of the cavity and results in heating and smoking. If so clean well with a dry clot and wipe out any moisture on the magnetron fitting slot.
However if the smell continues, check the capacitor to the magnetron or the magnetron or the main transformer itself.
You must open the cover and check for the origin of the smell.
estimate cost and decide.
Creddit if the advice helps.

There is usually a 125V, 20 AMP line fuse inside the microwave, mounted at the point where the power cord enters the back of the unit. Unfortunately, you will need to uninstall the oven (if this is an over the range model), UNPLUG it and remove the exterior case to access. The case comes off in various ways depending on manufacture and model. I found this wiring diagram at pcappliancerepair.com based on the model number you listed this question under:

http://pcappliancerepair.com/model-display.php


This model has TWO potential causes. The line fuse or the Thermal Cut-Out (Thermostat) for the Magnetron. The line fuse is connected in line with the power cord inside the unit and is listed as part of item 26 under the "Cabinet-Base-Cavity" heading.

The Magnetron Thermostat is listed as item 6 (part number 56001028) under the same heading. If you managed to overheat the oven any time recently, you may want to check the thermostat to see if it is still good. It should read 0 ohms when measured out of the circuit across the terminals.

If the line fuse is blown, you can usually purchase a box of fuses at a hardware store for just a little more than what the manufacturer charges for a single fuse. 125V, 20AMP Ceramic Slow Blow fuses are recommended.

If you have any questions, or need additional assistance troubleshooting, please post back and let me know. I hope you find this information helpful.

NOTE: Make sure you take any resistance readings with the microwave UNPLUGGED and the component under test isolated (removed) from the circuit. These ovens can blow a fuse by simply sitting idle. This can occur from any power fluctuations, brown outs, voltage spikes, etc. Or, it could be the symptom of a component that may have failed. If you find the internal fuse blown and replace it, only to have it blow again, you have a more significant problem than a simple blown fuse.

Hi! If it happens again please try this... Unplug the unit from power source and let it sit for atleast a couple of minutes to reset the system. Plug the unit again and see how it goes. Hope this helps and thank you for using FixYa!

Small component called a diode. Open up the microwave and try to find a black (usually) component that is most often connected between the magnetron (the thing that heats the food) and the chassis of the microwave oven (ground). I used to make a fortune replacing these! Costs about 5 bucks most appliance supply stores. Make darn sure you get one of the same value.

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

Microwave Oven Basic Troubleshooting Tips

heatman101
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Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

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heatman101

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my micro wave it doesn't heat?

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

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heatman101=-=-

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

Basic Microwave Oven TroubleshootingTips

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