On the red / white I get .2 Ohms.
On the built in red to chassis ground I get 93 Ohms.
The magnetron harness gives me 0 Ohms.
For the red / white I used the terminals that the red wires and the white wires connect to.
I just want to make sure, when measuring from the white wire to the other white wire on the magnetron harness, it measured 0 Ohms? If this is the case, the transformer does have an issue in the secondary winding.
I removed the two wire connector from the magnetron and tested between the two female spade connectors.
That does indicate an issue with the secondary winding of the transformer. WB17X10030 High-Voltage Transformer (Microwave) | Genuine Ge OEM In Stock
Ordered, thank you for your expert help!
I have installed the transformer and there is still no heating.
I’m going to go back into the case and check all the connections everywhere.
The only parts I can think of not replaced are the main control board and the capacitor.
The capacitor tested good last time.
Unfortunately, the only thing I would be able to point to is the voltage and neutral to the transformer not having a complete circuit when the microwave is operating as referenced previously. If all of the microswitches test good, and the wires are unbroken and have continuity, then the failure by process of elimination is the relay control since there was not 120 Volts AC when testing from the red wire to the white wire.
I have started over at the microswitches. I have to conclude I did not test the primary interlock correctly as I have 120v when I touch the two posts when running. It is the monitor switch that has no voltage when running. From there the transformer, diode and the magnetron have been replaced. The capacitor has not been replace because it tested good. What triggers the transformer?
Re-tested the capacitor, reading 1.04 when body says 1.00 + or - 3%.
Is that enough out?
Voltage travels through the primary switch to the transformer, then the main relay control closes the neutral relay to allow the circuit to complete. The monitor switch is directly connected to the transformer circuit and acts as a safety switch. If the main relay control has a stuck transformer relay, the monitor switch will cause the breaker to trip because the circuit has a “short”. However, if there is 120 Volts AC at the primary switch, but not at the monitor switch and the microwave is operating, either the main relay control is not completing the circuit or there is a break in the wire harness.
This may be foolish but I got the instructions for checking the setting for stores to not have the microwave work. Do you have the correct code for this device? Maybe I tested for the wrong code?
The demo mode would stop the upper and lower sections from operating at the same time. It is accessed by pressing and holding the start and back buttons at the same time for 3 seconds during power up. The same would be done to exit the demo mode.