Question about Maytag MMV4205 Microwave Oven

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Maytag MMV4205BAS OTR microwave does not vent internal steam and the microwave shuts off. It takes about 15 minutes to reset and power back up. What part is bad?

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I have this same microwave, and I'm having trouble with it shutting off. It use to go back on, but now it doesn't work at all. I tried replacing the two fuses under the panel, but that wasn't the problem.

After some research and calling vendors, I believe the issue is most likely due to a failure of the magnetron tube which supplies the microwaves. Take it to a repair professional to get a cost estimate on fixing.

This model of Maytag seems to have BIG problems! It's either the tube is out, the turner doesn't work, or it just goes dead. Usually it's after 2-4 years of service. Poor quality... Maytag lost a lot of clients with this product!

Posted on Aug 21, 2010

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Posted on Jan 02, 2017

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1 Answer

My microwave shuts off, black no power when ever I cook tv dinners, potatoes etc. after 2.5 or 3 minutes. After 10 minutes or so, power comes back on and it displays PF. lots of steam inside after.


Hi Kerry,
"PF" is power falure if you didn't aready know this. It sounds to me like the coolig fan might be running slow or there is blocked or restricted air flow through the unit. This cooling fan is only for the HV transformer and magnetron. Sometimes you may get air flow around the door but this is incidental. The PF tells me that the power is being interrupted either at the power source (wall outlet or circuit breaker) or the magnetron TCO is cutting out. It also could be a bad magnetron running too hot. As far as the steam goes, I usually just leave the door open on my microwave for 10 or 15 minutes to let the condensation evaporate.

Jun 25, 2015 | Hotpoint RVM1435 Microwave Oven

1 Answer

How do I change my MMV4205BAS to vent (recirculate) out of the front vent instead of the top vent.


Paul, if you look on top of the microwave before you install it you will see where the fan is located at the back edge. There should be 2-4 screws that hold it in place. Remove the screws and pull the fan up and out of the microwave and rotate the unit 90 degrees towards the front of the microwave and put it back in and replace the screws. That should be all that you have to do to get it to vent out the front.

Jul 29, 2014 | Maytag MMV4205 Microwave Oven

1 Answer

Maytag mmv4205bas cannot press keys


test this steps and fix it. GOD BLESS YOU


  1. Controller is confusedA power surge or random non-reproducible action of the universe may have resulted in the controller's program ending up in an infinite loop. Pull the plug for a minute or two to reset it.
  2. Defective Interlock switchesThis can result in the controller thinking the door is open and ignoring you.
  3. CleaningCleaning solutions (spray cleaner) may have gotten inside and shorted out the touchpad or controller. If this happens remove the touchpad, let it air dry for a few days, and then attach it back on the microwave.

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Jul 20, 2013 | Microwave Ovens

1 Answer

My microwave shows nothing on display and will not turn on


see this causes and fix it. God bless you
First check is the main fuse of the unit. On countertop units, you will need to take the shell off. The fuse will be close to where the cord comes through into the unit. OTR units, this main fuse is usually behind the control panel or possibly behind the vent. Usually the fuse is obvious if blown, otherwise test with an OHM meter, if open, replace fuse.
Some brands will also have a thermal cut-off fuse in the incoming voltage line to the control board. Older Maytags and Samsungs have this fuse in it. This thermostat looking fuse is usually above the oven cavity somewhere under the outside shell. Sometimes you can get to it through the vent of OTR models. Test with an OHM meter, replace if open.

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Sep 27, 2012 | Maytag Appliances Over-the-Range Microwave...

1 Answer

MMV4205BAS no power. Was not using it.


Try checking the fuses under the button panel.

Jun 08, 2010 | Maytag MMV4205 Microwave Oven

1 Answer

Is there a piece I can install on the bottom of my over-the-range microwave that will help keep the front of the microwave from being covered in steam when cooking on my stovetop?


Every over the range microwave has a vent on it that should be venting that steam. I don't know of anything you could put under there that would solve your problem as that is where then vents are and they would be blocked. It sounds to me as though your steam is not being vented properly, and this could also happen if the steam is being vented back into the room instead of outside as many OTR microwaves allow you to do. Its a little bit of work to vent it outside but I myself did that with my microwave and have never had a steam accumulation problem.

May 03, 2010 | Maytag Appliances Over-the-Range Microwave...

2 Answers

Maytag MMV4205BAS stopped dead in the middle of a heating cycle. Unplugged and plugged back in. Oven is on the same fuse and it's fine. Any ideas?


There are several possible causes for a dead oven. Since yours quit in the middle of heating, I'd say it's most likely failure of the magnetron tube which supplies the microwaves. There's a safety thermostat on the tube which opens up and shuts off power if the tube overheats. Overheating is one sign of a tube that's gone bad.

There's really nothing user-serviceable in a microwave oven. Because of hazardous voltages inside and the possibility of microwave leakage, service should be left to professionals. Take the oven to a service shop for an estimate.

Jun 03, 2009 | Sharp R-930AK Convection/Microwave Oven

1 Answer

MAYTAG MMV4205BAS Running but not heating


If the food in the cooking compartment is not heating at all, then you may have one of several components related to microwave energy generation that have failed or became disconnected internally.
Magnetron Tube, HV Capacitor, Filament Transformer or any number of sensors that disable power to the system. The control board could also cause the system to noty function correctly.. You wanted general inputs.. there ya go.. LOL
Not sure I told you anything you didn't already know but you should ask the tech what he did after he gets it going...
Regards,
Rick

Nov 28, 2008 | Maytag MMV4205 Microwave Oven

2 Answers

Shuts off after cooking a few minutes


Since it's under warranty, I would check with MayTag or a local Maytag-authorized servider: http://maytag.com/support/service_parts.jsp

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