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Troubleshooting- microwave turntable and fan run constantly when door closed, door switches test good, timer can be set and oven runs otherwise; need amana microwave ACM1580AS wiring diagram

Tested door switches top/ bottom have continuity with door closed. middle switch closed when door open. Have to open door to shut off turntable. have to unplug cord or light stays on.. other wise microwave works as it normally did.

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I'd look for a defective relay or shorted triac on the control panel circuit board. Either could cause this problem.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/david_29ad5d1dd86564b0

Posted on Jun 25, 2016

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If one of the switches does not go open the motor and light will stay on. Check the door alignment.

Posted on Jan 24, 2015

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1 Answer

My Frigidaire PLMBZ209GCA Microwave stopped working. I was in the middle of cooking something for 10 minutes and it stopped working half way thru, but the display kept on counting down. If I try to use it...


If it stopped working while you were cooking my first guess is that the magnetron TCO got hot and opened. It is supposed to reset after cooling down, but if it is old it may not have done so. Of course, there should be at least two door switches that close when you close the door. There is also a monitor switch that closes when opening the door (open with door closed). If you remove the control you should be able to check continuity on all switches, but you need to remove the wires to get a true reading. Some M/O have a TCO on top of the cavity, but you need to remove the cover to get to that. If you need more help, just get back to me.

Aug 10, 2011 | Microwave Ovens

1 Answer

I have a model number EM925RSL-B and the timer counts down but it does not heat up or turntable does not move?


I just bought an RV with the exact same microwave and the exact same problem. The problem with mine is the switch that detects that the door is closed is not getting activated. The reason for this is is the finger at the top of the door is damaged as well as the plastic piece that the finger grabs onto when the door is closed. This causes the finger not to come into contact with the switch. To test this you can turn your microwave on and start it. open the door and using a small screwdriver, depress the micro switch you can see upper right side of the door opening. then press start again. your turntable will start turning and the microwave will make a louder noise as a fan will turn on. CAUTION! Release the button as soon as you see the turntable rotation as you will be receiving microwave energy due to the door being opened.

Jul 02, 2011 | Microwave Ovens

1 Answer

My kenwood microwave model KCTAL30 is buzzing when power is switched on and door is shut ,when door opened buzzing stops but turntable is rotating.


I was having the same problem. Out of warranty for a month or so hence no-one wanted to know. Nothing to lose then. It had to be a door switch I thought and so removed cover. The bottom switch showed continuity (door open or closed). Removed the switch to reallign the contacts inside (the switch is open on one side so the cantacts can be seen. That did the trick and it now works again.

May 29, 2011 | Microwave Ovens

2 Answers

Sparp R 930 not heating, turntable not turning


I just repaired mine with the same symptoms. I found that the bottom microswitch on the door (there are 3 switches) was faulty. It started as open, when the door closed, the switch closed (good), but when the door was fully closed the switch was open again. I went to Electronic City with the switch in hand, they found me a duplicate that cost me $2.50. BTW - you must take out the door switch assembly, 3 screws plus wires, in order to work on the switch. Also, put the assembly back in so that the door latches close/open the switches correctly. -jk

Jan 14, 2010 | Sharp R-930AK Convection/Microwave Oven

1 Answer

My Dacor DMT2420 fan, light and turtable motor run continuously when the door is open. I have unplugged the unit to reset it with no help, another on-line forum expert suggested checking the door switches...


If the cooling fan, light and turntable run continuously when the door is open, but not when it is closed, your secondary interlock (bottom door switch) is shorted (always on).

Even if it's shorted, the actuator button (usually red) will still move up and down when you open and close the door.

It will need a new door switch.

See the service manual here. See our file on door switches here.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Jan 04, 2010 | Dacor DMT2420SS Microwave Oven

1 Answer

Model 565.66400, still runs when door is opened?


if unit runs with door open then one of the door switch is stuck closed.there are 2 door switches and they could be assesed by removing the control panel.disconnect wires from top and bottom switches and chkf for continuity.they should be normaly open when the door is open and closed when door is closed.one of them will closed even when door is open.replace that bad one.

Aug 11, 2009 | Kenmore Microwave Ovens

1 Answer

MH6150XMT Turntable and Magnetron do not engage


Looking at the schematic from the mini-manual for this model, the problem should be the secondary (top) door interlock switch or its mount.

(Power-wise, the hood / cooling fan is further "upstream" from the turntable and high voltage section).

There should be a "mini-manual" hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting & testing.

Even though a door switch clicks, it may still be bad inside. Its continuity must be checked.

Door switch or mount trouble can be caused by slamming the door or by opening the door while it's cooking without hitting the Stop pad first.

There are plastic mounts inside the microwave which hold the door switches and onto which the door latches lock when you close the door.

The screws on these mounts may be loose. If they get too loose, the switches will not be activated properly.

Sometimes it's a broken tab on the switch holder, allowing the switch to rotate just out of position. Other times, it's a broken tab on the switch holder, allowing the switch to rotate just out of position. This tab can be hard to see, since it is under the bottom edge of the switch.

One test that sometimes helps is to gently lift up (and / or push down) on the door or handle as you try to start it. If it works or tries to work, then it's a door switch mount or door alignment issue.

If you or someone you know decide to look into it, we have critical information on safety, disassembly and door switches at our site, and our link is at our listing here on FixYa:.

You can usually find helpful exploded view diagrams and order parts by entering your full model number here.

We're happy to help you and we'd appreciate your thoughtful rating of our answer.

Jul 24, 2008 | Whirlpool MH6150XMS Microwave Oven

1 Answer

Microwave runs on its own


This is usually caused by either a bad door switch, a loose door switch mount, or occasionally a problem on the control panel.

Even though a door switch clicks, it may still be bad inside. Its continuity must be checked.

Door switch or mount trouble can be caused by slamming the door or by opening the door while it's cooking without hitting the Stop pad first.

There are plastic mounts inside the microwave which hold the door switches and onto which the door latches lock when you close the door.

The screws on these mounts may be loose. If they get too loose, the switches will not be activated properly.

Sometimes it's a broken tab on the switch holder, allowing the switch to rotate just out of position. Other times, it's a broken tab on the switch holder, allowing the switch to rotate just out of position. This tab can be hard to see, since it is under the bottom edge of the switch.

One test that sometimes helps is to gently lift up on the door or handle as you try to start it. If it works or tries to work, then it's a door switch mount or door alignment issue.

If you or someone you know decide to look into it, we have critical information on safety, disassembly and door switches at our site, and our link is at our listing here on FixYa:.

If you think the problem is on the control panel, we repair these nationwide by mail for $39.95 postpaid in most cases.

We're happy to help you and we'd appreciate your thoughtful rating of our answer.

Jul 22, 2008 | Emerson MW8108P Microwave Oven

1 Answer

MICROWAVE TURNTABLE


Does it turn for just a moment or does it keep turning?

If it's just for a moment, that's normal.

If it stays on, either your top or bottom door switch is sticking or it's door switch mount is loose or broken.

Even though a door switch clicks, it may still be bad inside. Its continuity must be checked.

Door switch or mount trouble can be caused by slamming the door or by opening the door while it's cooking without hitting the Stop pad first.

There are plastic mounts inside the microwave which hold the door switches and onto which the door latches lock when you close the door.

The screws on these mounts may be loose. If they get too loose, the switches will not be activated properly.

Sometimes it's a broken tab on the switch holder, allowing the switch to rotate just out of position. Other times, it's a broken tab on the switch holder, allowing the switch to rotate just out of position. This tab can be hard to see, since it is under the bottom edge of the switch.

One test that sometimes helps is to gently lift up on the door or handle as you try to start it. If it works or tries to work, then it's a door switch mount or door alignment issue.

If you or someone you know decide to look into it, we have critical information on safety, disassembly and door switches at our site, and our link is at our listing here on FixYa:.

What is your brand & model number? We may have the service manual you can download free.

We're happy to help you and we'd appreciate your thoughtful rating of our answer.

Jul 20, 2008 | Goldstar MV-1501 Microwave Oven

2 Answers

Location of monitor switch for Sharp R-5A54B microwave


It's usually the one in the center, as opposed to the being near the top or bottom edge of the door.

The entire service manual is available for free download on the Sears parts site (page by page) at http://www3.sears.com/ (the 3 is correct)

Just look for the switch as ref # 1-7 on this diagram:
http://tinyurl.com/yqc9ol

We're happy to help and we appreciate your thoughtful rating of our answer.

Dec 30, 2007 | Sharp R-340 Microwave Oven

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