Discuss

Microwave: no heat - GENE: HV Diode Dead (was Amana ACO1860AW not heating)

 in

Microwave Repair

. "

Gene, I have determined that the HV Diode is no good. It tests 'infinity' (open) in both bias directions (tested

..."
 
 
Register | FAQ's | New Posts | Today's Posts | Extras
Appliance Repair Forum > Appliance Repair Help > Microwave Repair » Microwave: no heat - GENE: HV Diode Dead (was Amana ACO1860AW not heating)

Post New Thread  Reply By reading any content on this site you agree to AppliancePartsPros.com, Inc. disclaimer and Terms of Use.
 
LinkBack Thread Tools Search this Thread Display Modes
  #1 (permalink)  
Old 01-03-2009, 03:14 PM
Junior Member
 
Join Date: Jan 2009
Posts: 20
eyefish is on a distinguished road
Default Microwave: no heat - GENE: HV Diode Dead (was Amana ACO1860AW not heating)
Model Number: ACO1860AW   Brand: Amana   Age: 1 - 5 years   

Appliance Parts from AppliancePartPros.com


Gene,

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>


Related Models
Amana ACO1860AW MWAVE- MOUNTED OVER RANGE/WO
Amana ACO1860AW MWAVE- MOUNTED OVER RANGE/WO
Amana ACO27DE WALLOVEN- STD ELE
Amana ACO27DE WALLOVEN- STD ELE
Amana ACO27DE1 WALLOVEN- STD ELE
Amana ACO27DE1 WALLOVEN- STD ELE
Amana ACO27DEW WALLOVEN- STD ELE
Amana ACO27DEW WALLOVEN- STD ELE
Amana ACO27DEW1 WALLOVEN- STD ELE
Amana ACO27DEW1 WALLOVEN- STD ELE
Amana ACO27DK WALLOVEN- STD ELE
Amana ACO27DK WALLOVEN- STD ELE
Amana ACO27SE WALLOVEN- STD ELE
Amana ACO27SE WALLOVEN- STD ELE
Amana ACO27SE1 WALLOVEN- STD ELE
Amana ACO27SE1 WALLOVEN- STD ELE
Amana ACO27SEW WALLOVEN- STD ELE
Amana ACO27SEW WALLOVEN- STD ELE
Amana ACO27SEW1 WALLOVEN- STD ELE
Amana ACO27SEW1 WALLOVEN- STD ELE
Amana ACO27SK WALLOVEN- STD ELE
Amana ACO27SK WALLOVEN- STD ELE
Frigidaire ACO59J7B1 Wwh(v2) / Room Air Conditioner
Whirlpool ACP052XM0 Air-conditioner/heat pump
Whirlpool ACP052XM1 Air-conditioner/heat pump
Whirlpool ACP052XT0 Air-conditioner/heat pump
Whirlpool ACP062XM0 Air-conditioner/heat pump
Whirlpool ACP062XM1 Air-conditioner/heat pump
Whirlpool ACP092PR0 PORTABLE AIR CONDITIONER
Whirlpool ACP102PR0 PORTABLE AIR CONDITIONER
Whirlpool ACP102PR1 PORTABLE AIR CONDITIONER
Whirlpool ACP102PR2 PORTABLE AIR CONDITIONER
Whirlpool ACP102PR3 PORTABLE AIR CONDITIONER
Whirlpool ACP102PS0 PORTABLE AIR CONDITIONER
Whirlpool ACP102PS2 PORTABLE AIR CONDITIONER
Amana ACP11 Freezer - Chest
Whirlpool ACP492XM0 Air-conditioner/heat pump
Whirlpool ACP492XM1 Air-conditioner/heat pump
Whirlpool ACP492XT0 AIR CONDITIONERS
Whirlpool ACP502XM0 Air-conditioner/heat pump
Whirlpool ACP502XM1 Air-conditioner/heat pump
Whirlpool ACP502XR0 Air-conditioner/heat pump
Whirlpool ACP552XR0 Air-conditioner/heat pump
Whirlpool ACP552XS0 Air-conditioner/heat pump
Whirlpool ACP552XT0 Air-conditioner/heat pump
Whirlpool ACP552XT1 Air-conditioner/heat pump
Whirlpool ACP602XM0 Air-conditioner/heat pump
Whirlpool ACP602XP0 Air-conditioner/heat pump
Whirlpool ACP602XS0 Air-conditioner/heat pump
Whirlpool ACP602XT0 Air-conditioner/heat pump
Whirlpool ACP802XM0 Air-conditioner/heat pump
Whirlpool ACP802XP0 Air-conditioner/heat pump
Whirlpool ACPE102PS0 AIR CONDITIONER HEAT/COOL PORTABLE
Whirlpool ACPE102PS2 PORTABLE AIR CONDITIONER HEAT/COOL
Whirlpool ACPS82XS0 Air-conditioner/heat pump
Whirlpool ACQ052PK0 AIR CONDITIONER
Whirlpool ACQ052PP0 AIR CONDITIONER
Whirlpool ACQ052PR0 AIR CONDITIONER
Whirlpool ACQ052PR1 AIR CONDITIONER
Whirlpool ACQ052PR2 AIR CONDITIONER
Whirlpool ACQ052PR3 AIR CONDITIONER
Whirlpool ACQ052PS0 AIR CONDITIONER
Whirlpool ACQ052PS1 AIR CONDITIONER
Whirlpool ACQ052PS2 AIR CONDITIONER
Whirlpool ACQ052PS3 AIR CONDITIONER
Whirlpool ACQ052XA0 AIR CONDITIONER
Whirlpool ACQ052XD0 AIR CONDITIONER
Whirlpool ACQ052XF0 AIR CONDITIONER
Whirlpool ACQ052XG0 AIR CONDITIONER
Whirlpool ACQ052XG1 AIR CONDITIONER
Whirlpool ACQ052XH0 AIR CONDITIONER
Whirlpool ACQ052XJ0 AIR CONDITIONER
Whirlpool ACQ052XW0 AIR CONDITIONER
Whirlpool ACQ052XY0 AIR CONDITIONER
Whirlpool ACQ052XZ0 AIR CONDITIONER
Whirlpool ACQ052XZ1 AIR CONDITIONER
Whirlpool ACQ052XZ2 AIR CONDITIONER
Whirlpool ACQ058MM0 AIR CONDITIONER
Whirlpool ACQ058PL0 AIR CONDITIONER
Whirlpool ACQ058PL1 AIR CONDITIONER
Whirlpool ACQ058PP0 AIR CONDITIONER
Whirlpool ACQ058PR0 AIR CONDITIONER
Whirlpool ACQ058PR1 AIR CONDITIONER
Whirlpool ACQ058PR2 AIR CONDITIONER
Whirlpool ACQ058PR3 AIR CONDITIONER
Whirlpool ACQ058PS0 AIR CONDITIONER
Whirlpool ACQ058PS1 AIR CONDITIONER
Whirlpool ACQ058PS2 AIR CONDITIONER
Whirlpool ACQ058PS3 AIR CONDITIONER
Whirlpool ACQ058PS4 AIR CONDITIONER
Whirlpool ACQ058PS5 AIR CONDITIONER
Whirlpool ACQ058PS6 AIR CONDITIONER
Whirlpool ACQ058PS7 AIR CONDITIONER
Whirlpool ACQ062MM0 AIR CONDITIONER
Whirlpool ACQ062MP0 AIR CONDITIONER
Whirlpool ACQ062MP1 AIR CONDITIONER
Whirlpool ACQ062PK0 AIR CONDITIONER
Whirlpool ACQ062PR0 AIR CONDITIONER
Whirlpool ACQ062PR1 AIR CONDITIONER
Whirlpool ACQ062PR2 AIR CONDITIONER
Whirlpool ACQ062PR3 AIR CONDITIONER
Whirlpool ACQ062PS0 AIR CONDITIONER
Whirlpool ACQ062PS1 AIR CONDITIONER
Whirlpool ACQ062PS2 AIR CONDITIONER
Whirlpool ACQ062PS3 AIR CONDITIONER
Whirlpool ACQ062PS4 AIR CONDITIONER
Whirlpool ACQ062PS5 AIR CONDITIONER
Whirlpool ACQ062PS6 AIR CONDITIONER
Whirlpool ACQ062PS7 AIR CONDITIONER
Whirlpool ACQ062XA0 AIR CONDITIONER
Whirlpool ACQ062XD0 AIR CONDITIONER
Whirlpool ACQ062XF0 AIR CONDITIONER
Whirlpool ACQ062XG0 AIR CONDITIONER
Whirlpool ACQ062XH0 AIR CONDITIONER
Whirlpool ACQ062XJ0 AIR CONDITIONER
Whirlpool ACQ062XW0 AIR CONDITIONER
Whirlpool ACQ062XW1 AIR CONDITIONER
Whirlpool ACQ062XZ0 AIR CONDITIONER
Whirlpool ACQ068MP0 AIR CONDITIONER
Whirlpool ACQ068PR0 AIR CONDITIONER
Reply With Quote
See inside of your appliance - diagrams and part photos for virtually every model.

powered by AppliancePartsPros.com
 
  #2 (permalink)  
Old 01-05-2009, 11:49 AM
Junior Member
 
Join Date: Jan 2009
Posts: 20
eyefish is on a distinguished road
Default GENE: Please...need your advice ASAP

Gene,

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.

Please advise ASAP.
Thanks,

Al
Reply With Quote
  #3 (permalink)  
Old 01-06-2009, 05:12 PM
Gene's Avatar
Senior Expert
APP Volunteer
 
Join Date: Jul 2007
Location: Orange County, California
Posts: 27,171
Gene has a brilliant futureGene has a brilliant future
Default

Hi Al,

Remove the wires from the high voltage transformer primary winding and check for 120VAC between them while the control calls for heat and the door is closed.

If there is 120VAC then the magnetron is bad.

If there is no proper voltage then the problem is a bad secondary switch or a bad control board.

Gene.
P.S. Did you remove the transformer wires from the magnetron and the capacitor before testing the filament winding?
__________________
Appliance Repair Expert in Orange County, California.

Order Appliance Parts with 365-Day Hassle Free Return Policy - AppliancePartsPros.com
Reply With Quote
  #4 (permalink)  
Old 01-07-2009, 08:26 AM
Junior Member
 
Join Date: Jan 2009
Posts: 20
eyefish is on a distinguished road
Default

Hi Gene,

I already ordered a magnetron 2 days ago, & it's on it's way. Should be here today or tomorrow.
I has seen a small *note* in the service manual that read: "If everything tests good in the HV system; including the magnetron.....and there is still not heat...replace the magnetron..."
And in answer to your *PS*question....I had NOT removed the HV (red & white) transformer wires, or the capacitor wires before testing the filament winding.....I realized that later.
I removed them later, & tested the filament windings & the capacitor again, & then they tested OK.
I have been able to do all my diagnostic testing & diode replacement so far through the front of the unit, after removing the control panel.
I don't think I will be able to replace the Magnetron through the front.....I believe that the unit will need to be removed from the wall, & the casing opened up.
Do you know of a way to replace the magnetron through the front without removing the unit from the wall?

Thanks Gene..
You are a gentleman for helping people diagnose & repair their appliances by sharing your many years of accumulated knowledge.
I do the same thing on a Volvo Repair forum because I am a retired Volvo Dealership Master Tech, & have been helping people as you do for a number of years.

I will let you know how I make out with the magnetron after I install it.
Are there any tricks with positioning it or with a gasket?

Thanks again,

Al
Reply With Quote
  #5 (permalink)  
Old 01-07-2009, 01:49 PM
Gene's Avatar
Senior Expert
APP Volunteer
 
Join Date: Jul 2007
Location: Orange County, California
Posts: 27,171
Gene has a brilliant futureGene has a brilliant future
Default

Quote:
Originally Posted by eyefish View Post
...I don't think I will be able to replace the Magnetron through the front.....I believe that the unit will need to be removed from the wall, & the casing opened up...l
Hi Al,

Thank you for your good words.

You are absolutely right - there are no other ways to access the magnetron. You are on the right track. Good luck.

Gene.
__________________
Appliance Repair Expert in Orange County, California.

Order Appliance Parts with 365-Day Hassle Free Return Policy - AppliancePartsPros.com
Reply With Quote
  #6 (permalink)  
Old 01-08-2009, 03:14 PM
Junior Member
 
Join Date: Jan 2009
Posts: 20
eyefish is on a distinguished road
Default

Gene,

Microwave fixed.

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)
Installed it, & that was it!
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.
Thanks for your assistance.
I wouldn't have known where to begin fault-tracing without your guidance.
You are extremely helpful in answering questions & giving links to repair manuals & part numbers, etc!
And you are extremely knowledgeable!
Thanks again for your help!

Al
Reply With Quote
  #7 (permalink)  
Old 01-09-2009, 02:37 PM
Gene's Avatar
Senior Expert
APP Volunteer
 
Join Date: Jul 2007
Location: Orange County, California
Posts: 27,171
Gene has a brilliant futureGene has a brilliant future
Default

You are welcome. I'm glad you were able to fix it.

Gene.
__________________
Appliance Repair Expert in Orange County, California.

Order Appliance Parts with 365-Day Hassle Free Return Policy - AppliancePartsPros.com
Reply With Quote
See inside of your appliance - diagrams and part photos for virtually every model.

powered by AppliancePartsPros.com
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Amana microwave not heating adamsjr Microwave Repair 0 01-25-2010 06:06 AM
replaced diode whirlpool microwave still doesn't heat skumpula Microwave Repair 0 06-04-2009 07:20 PM
Gene: need advice on Amana ACO 1860 AW: not heating eyefish Microwave Repair 1 01-06-2009 05:14 PM
GENE: HV Diode Dead (was Amana ACO1860AW not heating) eyefish Microwave Repair 0 01-03-2009 02:38 PM
Amana microwave dead ksenger Microwave Repair 0 02-21-2008 03:15 PM



All times are GMT -7. The time now is 10:36 AM.

The content on this web site is for informational purposes only and is not intended to replace an on-site diagnosis from a qualified appliance service technician. By reading any content on this site you agree to AppliancePartsPros.com , Inc. disclaimer and Terms of Use.
Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO ©2011, Crawlability, Inc.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17