Samurai Appliance Repair Man's Blog

Here's a great shot from Master Appliantologist RussTech of a magnetron that's gone into full meltdown.  

Source: From: Bad Magnetron

If you're troubleshooting a no heat problem in a microwave oven, the first thing to check is the door interlock switches.  



If those check out good, then you're off the high voltage circuitry in the microwave.  This video will show you how to troubleshoot the high voltage system ==> Download Video (180mb, .mov file)

To learn more about your microwave or to order parts, click here.

from the 16021668.pdf service manual:
Door Removal
1. Disconnect power to oven and remove grille, (see "Grille" procedure).
2. Open the oven door, slowly raise the door evenly. disengaging the pins at the top and bottom.
NOTE: When aligning the door for assembly, the door must be opened as much as possible.
3. To place door back on unit, place bottom pin into hole first and then align the top pin.
Once pins are aligned push door downward to lock into place.
4. Replace front grille to complete assembly.

Door Disassembly
1. Disconnect power to oven and remove oven door, (see "Door Removal" procedure).
2. Pry away choke cover, by placing a tool in the upper right corner of the door and gently prying outward on the choke cover.
Continue to work around the door casing until choke cover is completely loose.
! CAUTION
To avoid property damage, care must be taken when prying choke cover from oven door.
3. Slide latch assembly upward and to the left to release plastic tabs from door frame.
Once latch assembly is loose the spring may be disconnected from the door frame.
4. Remove screws securing door handle and door frame to door panel.
5. Remove door frame by releasing tabs around entire door panel.
6. Remove door handle by placing a hand on door panel next to the top of the door handle.
Twist door panel towards the inside of door and pulling on the top portion of the door handle in a quick jerking motion.
NOTE: When replacing door handle, the bottom portion of the door handle must be inserted first.
7. Slide door glass to the right slightly, then push the door glass upward to release the glass from the track.
8. Reassemble in reverse order.

! CAUTION
Once outer door trim panel is removed the glass panel is loose.
! CAUTION
A microwave leakage test must be performed anytime a door assembly is removed, replaced, disassembly, or adjusted for any reason.

Part link for the replacement door handle ==> Door Handle


Source: Broken handle on Maytag Microwave MMV4184AAW

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click on picture
then lower right corner to SAVE or CLOSE

Source: Help! Jenn-Air JMW9527CAB wall oven/microwave combo will not heat

When you're troubleshooting a no-heat complaint in a microwave, one of the components you may need to check is the high-voltage rectifier (called a "rectumflyer" in the trade. )

Trouble is, the junction resistance on these rectumfliers is so high that doing a standard forward and reverse bias test with an ohm meter won't tell you anything because it'll just read open in both directions. This video shows an easy method for testing these special critters:

To learn more about your microwave oven or to order parts, click here.