What could be the problem? On this unit the mircowave section is not heating. First, I replaced the L & R side door switch assy. It worked, then the next day it did't work. Next, I replaced the cap.& diode it worked, then the next day it did't work. Please help. I am thinking magnetron, what do you think?
ANSWER Hello Alf,
You could test the transformer and the magnetron to see if they are bad. Using multi-meter measure the tranformer with the leads disconnected Primary, secondary and Filament to ground. You should read less than 1 ohm on the primary and secondary. Filament to ground should be 0 ohms. Measure resistance of primary and filament should be infinite. Check the magnetron touch the leads to f and fa terminals should be approximately 0 ohms and measure from filament to chassis and should be 0 ohms. Anything other than these readings means the part is bad. If the parts check ok then you would want to replace the control board. You can test this with a multi-meter TJMA-DMT3. Here is a link on how to use a multi-meter. http://forum.appliancepartspros.com/oven-repair-including-ranges-cooktops/4810-how-check-continuity-ohmmeter.html
Answered by AppliancePartsPros.com | Monday, December 17, 2012