Question about Panasonic NN-P794SF Microwave Oven

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Door will not open. Nothing broken in the mechanism

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Hi Glen,
Have you taken the wrapper off of the unit to open the door? You usually have to use a pencil or small screwdriver to lift up on the bottom latch head (doorkey as Panasonic calls it). These counter top models typically use a three step method to open the door. The push to open button pushes on a lever that then lifts up on the bottom doorkey. The lifting lever cracks and won't support fully the weight of the doorkey. The crack can be small enough to not really be noticeable if you are not very familiar with this problem. I'm pretty sure that this is what you will find. Let me know..

Posted on Oct 28, 2013

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Posted on Jan 02, 2017

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1 Answer

The door no longer pops open when the latch button is pushed. How do I fix this?


One of the door latch arms or the latching mechanism inside the oven have broken. you may have to buy a complete door lock / latching assembly . Might not be worth it. Check with your nearest parts supplier.

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You can disassemble the microwave oven and check out the release mechanism. You'll find several hooks that hold the door closed and a linkage mechanism to the door opening button. There may be a broken piece of plastic or maybe just a loose or missing screw that holds linkage together. In the case of a broken plastic part, you can fix it with a 2-part epoxy adhesive, but you'll need to permanently splint across the break with a piece of metal or strong plastic that you've scavenged from somewhere. Before epoxying the splint in place, rough up all plastic surfaces where you want the epoxy to stick well.
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Door catch broken - door will not close. no sign of a broken piece. There was a bang and the catch just doesn't hold at all. door swings open


Door catches.

One of the latches has broken off and is not lifting the other latch clear of the housing. Remove from any power source, remove the cover of the cabinet. Slacken off the clamp mechanism and ease the clamp over the guide to allow the door to open. When a new door lever is in place, the door may be easily adjusted by slackening off the screws that clamp the door catch/actuators in place whilst holding the door closed and then tightening the screws. The rear of the door may be adjusted by slackening the lower door hinge screws and adjusting as required.
I hope that helps.



Door switches

If one of the door interlock switches is not switching properly, that can cause the turntable/light to come on even though the "Starts" button has not been depressed due to the wiring of the switches.
Check for faulty door switches and/or contaminated actuators.
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1 Answer

When I turn on my oven for cleaning it shows a f9 problem...could you help me with that


An F9 error code on a General Electric oven indicates that the oven's electronic control system has detected a problem with the automatic door lock. The automatic door lock mechanism prevents the oven door from being opened when the oven is set for "Clean" mode. The malfunction may be a jammed door lock mechanism, a pinched or broken wire, a faulty lock switch or a fault in the control board itself.

Things You'll Need:
  • Ohmmeter or multimeter
  • Phillips screwdriver
#step1

Disconnect power to the oven.
#
Step 2

Open the oven door. Remove three screws from underneath the oven's control panel. Lift the control panel straight up to disengage the mounting pins on the top corners of the panel, then tip the panel toward you.
#
Step 3

Inspect the door lock mechanism. The mechanism is in the lower left area of the space behind the control panel. Rotate the cam on the door lock mechanism to be certain it moves without binding. Replace the mechanism if its mechanical parts do not function properly.
#
Step 4

Inspect the wires that connect the door lock mechanism to the control panel. Check for pinched or broken wires. Check for wires with frayed insulation. Repair wires as needed if defects are present.
#
Step 5

Locate the six-pin connector on the door lock motor on the right end of the door lock mechanism.
#
Step 6

Rotate the cam on the door lock mechanism to the unlocked position. Test the resistance between Pin 3 and Pin 1 of the door lock connector with the ohmmeter. The resistance should be 0. Replace Lock Switch 2 of the door lock mechanism if the resistance reads other than 0.
#
Step 7

Rotate the cam on the door lock mechanism to the locked position. Test the resistance between Pin 3 and Pin 2 of the door lock connector with the ohmmeter. The resistance should be 0. Replace Lock Switch 1 of the door lock mechanism if the resistance reads other than 0.
#
Step 8

Contact a certified repair facility if the source of the F9 code has not been discovered.
Troubleshooting the oven with the electric power turned on is a job for a certified technician.

Do not perform troubleshooting on the oven with the power connected. Personal injury and damage to the oven can result.

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1 Answer

Door open button is broken, door will not open


door button mechanism is all behind the control panel.
there should be a couple screws holding the control panel on, you can see them when you open the door i believe.
you probably need to slide it one way or another to get it to unhook from its hidden catches..
there is the outer button you press with your hand thats available in 3 colors depending on your model #, and then the inner latch..
it will need to be checked to verify which parts are broken..
hope this helps,
best of luck,
ttfn

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1 Answer

MVP IV Microwave Model VM12AM-1


There are a series of switches in the door latch mechanism which are a safety interlock system. If the latch on the door is secure and not broken then it is in the latch mechanism itself. It is possible for the mechanism to come loose and stop the oven from working. The control panel will have to be removed and the mechanism adjusted for proper operation.

Alternately if the door hinges (screw in type) are not aligned properly then it can cause the same symptoms.

I am unable to locate your model in my reference, but there is usually one or two screws behind the grille that hold the control panel on if it is a vent hood style. If it is a cabinet style then the cabinet will have to be opened. Be sure to disconnect power at lease 1/2 hour before opening.


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1 Answer

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sounds like door locking mechanism or door switches are inoperable, had same issue, turned out to be broken plastic door latch. Replacement part on Repairclinic.com for less than $10.

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1 Answer

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check door open mechanism, any broken change the mechanical parts,

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2 Answers

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In most cases this is due to a broken door opening lever or loose or broken door latch / hook parts. They can only be accessed and examined if the cover is removed from the microwave. In many over the range models, you can access the door parts by removing the control panel assembly. Sometimes you may be able to get it open by pushing up gently on the bottom of the door while pushing the button, in case you need to empty it.

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