Mistral microwave MUMW23SS has no heat, light comes on, turntable operates OK, tested the megatron and reading 0.4 ohms, tested the internal fuse this is OK any suggestions

SOURCE: GE Microwave JE2160 does not heat

Does it make any noises that it didn't before it failed?? It could be a bad secondary interlock switch, cook relay on the PCB, HV circuit problem or bad magnetron. You need an ohm meter to troubleshoot. If you take the cover off, you MUST short across the High Voltage Capacitor terminals to discharge any possible residual charge to prevent shock hazard.

SOURCE: Goldstar MV1501W not heating or turntable, light/display does wrk

micro switch is bad .remove top vent cover 4 screws,after removing plastic vent panel you will see 1 screw above display time window,remove this screw and lift up the complete button time control panel slightly and pull towards you to remove.there are 2 connections on this panel 1 is a 12 pin connector and a 2 pin power connection remove both put control panel aside.now there are 3 micro switches where the door pins close into the oven lock,remove 2 screws that hold the micro switch housing,on the bottom of housing you will see a small clip gently pull to the right and push back to remove .there are 2 switches on bottom of it and 1 on top. the 1 on top is normally open and closes when door is shut but like mine it stayed open and resulted in (light s display but no turntable)soon as i replaced upper microswitch it runs perfect.i hope this helps .MODEL MV1501W GOLDSTAR

William Miller

• 9179 Answers
• Posted on Mar 02, 2009

SOURCE: GE XL 1800 microwave light and fan operate but no heat

With the symptoms you have, I would most strongly suspect a shorted high voltage rectifier diode or a bad magnetron, or a loose and possibly corroded connection on the magnetron's terminal.

The diode is a fairly cheap fix, and your magnetron is still under the part warranty, but you would have to pay labor.

If you or someone you know decide to look into it, we have critical safety information and disassembly information at our site, and our link is at our listing here on FixYa.

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.



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.

Here are some links you or someone you know can use for test help, but read their safety warnings first:

http://www.gallawa.com/microtech/diode.html
(if it's not shorted or burned, it's probably okay)

http://www.gallawa.com/microtech/mag_test.html

If it's within the magnetron portion of the warranty (5-9 years) but out of the original full warranty (1 year), G.E. will cover the part cost, but not the cost to visit you or the labor charge to do the work.

If it's within the mag warranty, G.E. should send you the magnetron to do it yourself. Call them at 888-239-6832 with your model, serial, and manufacturing date.

If nothing else, you can save about $50-75 if you remove it from the wall and take it to a GE-authorized servicer.

You can find a GE-authorized servicer by calling GE Appliance Service at 1-800-848-7620 or here.

Accessing some components for testing and possible replacement will require you to remove the oven from the wall.

If so, the installation instructions are very handy, and it's best to have two people since the microwave can be heavy and awkward.

You can download GE owner's manuals and installation instructions here.

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

SOURCE: Sharp Microwave R-520L stopped working

My parents had the same problem. It turned out that a switch went bad. When you take the case off, there are 3 switches where the door latches. The bottom switch went bad. It is an Omron D3V-16G-3C25 switch.

SOURCE: My Russell Hobbs microwave will not generate heat

If everything else is normal, the trouble may be a failed magnetron tube (the microwave source), problems on the control circuit board, or parts in the tube power circuit that are bad. It's also possible a door switch can be at fault, but this usually keeps something else (fan, turntable or light, most often) from running as well.

Microwave servicing is best left to professionals. There are potentially deadly voltages present, and a chance of microwave leakage if repairs aren't done correctly. Take the oven to a shop for an estimate, or just consider replacing it if it isn't a built-in, an over the range unit or a high-end countertop model.