I have determined that the HV Diode is no good. It tests ‘infinity’ (open) in both bias directions (tested with a high quality Fluke Meter)
I would like to know; in your opinion; if I should order more parts than just the diode? I didn’t get any spark whatsoever out of the HV Capacitor when I went to discharge it prior to removal of the diode for testing. I did not, however, test the capacitor, after I found the diode bad.
Thanks,
Al
<snip>
My Amana ACO 1860 AW (over the range) microwave is not heating.
It seems everything else works fine.
I located the tip sheet inside under control cover.
Fuse tests OK.
Magnetron tests OK.
HV Transformer tests OK except for Filaments to chassis tests shorted…sheet says they should test infinite.
Does this tell me that the HV transformer is NG? <snip>
Please…I need your help. (Amana ACO 1860 AW 6 yrs old)
I fault traced everything, & everything specked out OK.
All values of all the pertinent parts were within spec. (as per service manual, & tech sheet behind control panel.
I replaced the diode, because I got a false negative on the original one, but the new one tests the same as the old one. (I rechecked them both with a 10V battery later, & instead of testing with an OHM meter…I checked current flow one way & the other…current flowed one way, but not the other)
So now my question is: some unknown part needs replacement…should I just replace the magnetron; even though it tests fine using the test procedures of the service manual & spec sheet?
It’s an expensive part to buy if that isn’t the problem for certain.
[SIZE=4]Gene,[/SIZE]
[SIZE=4][/SIZE]
[SIZE=4]Microwave fixed.[/SIZE]
[SIZE=4][/SIZE]
[SIZE=4]I received the NEW magnetron this morning which I got on ***** for less than 1/2 what they asking in appliance parts stores (local & online)[/SIZE]
[SIZE=4]Installed it, & that was it![/SIZE]
[SIZE=4]The hardest part of the repair was removing the unit from the wall & re-installing it later (it’s an over-the-range-unit) & removing the outer case.[/SIZE]
[SIZE=4]Thanks for your assistance.[/SIZE]
[SIZE=4]I wouldn’t have known where to begin fault-tracing without your guidance.[/SIZE]
[SIZE=4]You are extremely helpful in answering questions & giving links to repair manuals & part numbers, etc![/SIZE]
[SIZE=4]And you are extremely knowledgeable![/SIZE]
[SIZE=4]Thanks again for your help![/SIZE]
[SIZE=4][/SIZE]
[SIZE=4]Al[/SIZE]
Hello everyone,
To take care of some electrical work yesterday, I had to turn off the main breaker for 2 hours. When power was restored, the fridge and freezer came on, the condenser fan could be heard, but after 1/2 hour, the fridge/freezer compartments were still warm, as was the center frame between the doors. After applying an external fan to the compressor area, all was cold again and making ice, and I went to bed happy. This morning everything was still cold and chilled, but the compressor was and remains too hot to touch, as does the center frame between the doors. I have placed the external fan on it again, but fear that the power on’s and off’s may have caused a problem for it. Condenser and fans are working fine. Any ideas?