Question about Microwave Ovens

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Unit has power; light is on, carousel rotates, total keyboard is active, but not heating at all.

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Magnetron tube is dead.  Not a DIY project to fix.

Posted on Jun 02, 2009

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Posted on Jan 02, 2017

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Microwave lights, clock, and everything works except when you press start, it just counts down like its cooking, but the microwave is actually not on. No hum as usual or plate rotating. It just counts...


Hi, one of the most common reasons why the turntable won't rotate is that the microwave isn't clean. The turntable guide and carousel can get sticky, preventing the turntable from properly moving. If you have built-on food particles or liquids, fill a bowl with 2 or 3 cups of water and 1 tsp. of liquid detergent and lemon. Run the microwave for about 3 minutes. Clean the microwave with a cloth, including the base of the turntable, guide, carousel grooves and microwave base. Your microwave turntable won't rotate if the grooves on the base of the turntable do not sit right on the carousel. Also, check the position of the turntable guide. Place the guide directly under the turntable. Remove the turntable, and then reposition it into the carousel grooves.
Motor The carousel motor is located beneath the base plate of the microwave. If the carousel isn't turning at all, check the motor. Disconnect the microwave from the power source, and remove the turntable, guide and base plate. Try turning the motor to see if it's just stuck. If it doesn't turn freely after a few seconds, examine the motor to see if it's burned out or corroded. Use an ohmmeter to see if the motor has continuity. If not, you must replace the motor.
Bushings The drive bushings are plastic components that sit underneath the cooking plate. Remove the plate, and examine the bushings. Use a magnifying glass if necessary to see if any debris is caught in the plastic. Clean the bushings, and reinsert the plate. Turn the microwave on to see if it rotates. If the bushings are extremely worn or if some of the plastic is broken off, you need to replace it, which is a complicated repair for consumers. Contact a service technician for assistance.

May 07, 2011 | Amana Radarange Microwave Oven

1 Answer

Sharp Carousel Microwave Convection R-820JS. Oven gets hot but turntable does not rotate causing uneven baking.


If the oven is STILL heating, but the carousel isn't turning, this problem is commonly attributed to a turntable motor that has worn out and may need to be replaced. The motor is attached to the center plastic piece (called a turntable shaft, turntable ring or coupler) under the middle of the glass tray. The following link explains how to access and replace the motor:

http://www.fixya.com/support/r3555716-replacing_a_turntable_motor_on_a_microwa

This is a very simple repair, that usually is not expensive. The price will be determined by the model and manufacturer. This repair can also be performed on an over the range model microwave oven WITHOUT uninstalling it.

You can refer to any of the following websites for comparison:

searspartsdirect.com
pcappliancerepair.com
appliancepartspros.com
repairclinic.com

The first three sites listed have helpful exploded view diagrams to assist you with locating and properly identifying the part(s) you may need.

The average price for a motor is about $35 to $45. If your model number is not listed at all the sites, use the part numbers from the Sears site and use them for your search criteria. The model numbers don't always cross reference, but the part numbers do. The part number for a replacement turn table motor for the model you have listed is RMOTDA254WRZZ (listed as item 1-3 under the "Oven and Cabinet" parts section. If your model number does not cross reference to all websites, use the part number from the Sears website as your search criteria.


NOTE: Even though the carousel may not be turning, you can still use the microwave while awaiting parts. You will need to physically rotate whatever you are heating about midway through the cook time to ensure even heating. Early model microwave ovens were not equipped with a rotating carousel and this was the common procedure.

Apr 28, 2011 | Microwave Ovens

1 Answer

My sharp 1214 won't heat anything. power is good - timer and clock are fine. stopped working in the middle of heating something. we use often. carousel is not rotating anymore either.


Hi,


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

Basic Microwave Oven Troubleshooting Tips

heatman101


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Aug 10, 2010 | Sharp R-1214 Microwave Oven

1 Answer

Sharp carousel r-508ak - does not heat up the food


You probably have a defective magnetron or blown fuse supply power to magnetron.

May 12, 2009 | Microwave Ovens

1 Answer

After the microwave stops, I the carousel is still turning.


NO RADIATION THERE, AND NOT LIGHT ACTIVATED. THERE SEEMS TO BE A MISCOMMUNICATION WITH IN THE MOTHERBOARD. IF IT PERSISTS YOU MAY WANT TO ET A NEW ONE. MOTHERBOARDS ARE NOT CHEAP.

Apr 11, 2009 | Microwave Ovens

1 Answer

Sharp R-1490 microwave 2000


the fuse to the magnetron may be blown or the mag it's self is gone. if the door switch was bad the unit wouldn't rotate the carousel. if it is the fuse (check with a multi-meter and check continuity across both side of the fuse, acheap one will do) if it is good, time to replace the micro, as they are cheap and repair would cost more than to replace. hope this helps.
bf

Mar 07, 2009 | Sharp R-1405 / R-140 Microwave Oven

1 Answer

Sharp Carousel Convection Microwave R-9H56 suddenly stops heating


at highvoltage section wiring may bae problem, check wiring and connectrors of magnetron and capacitor and transformer.

Dec 11, 2007 | Sharp R-510HW Microwave Oven

1 Answer

Display and heating problems


Problem #2 is a bad door switch or door switch mount.

Problem #1 is a trouble with the control unit / display.

The avergae do-it-yourselfer can replace a door switch if he follows the proper safety and repair advice.

We repair control units on a regular basis for customers nationwide with our guaranteed $39.95 service.

We have critical safety information, info on door switch diagnosis and replacement, and disassembly information at our site, linked here on Fixya: http://tinyurl.com/yzjozk

When you get to our site, do a Ctrl-F search for R630.

We also have the entrie service manual for these on our site.

Oct 31, 2007 | Sharp R-630D Microwave Oven

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