Question about Danby DMW139 Microwave Oven

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Door won't open

When trying to open the door by pushing on the rectagular button, there is no resistance and the mechanism inside has obviously broken. How can I open the door without causing too much damage? There's a container full of milk in there and would like to get it out before bringing the micorwave back to the store.

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Re: door won't open

Im sorry to say, but the housing will have to come off to unlatch the door from the inside.Not difficult ,Unplug the unit and remove all of the screws around the top of the housing cover if any,also
rear and both sides will have to come out.When they have all been removed, lift the rear of the top housing cover and pull back.You will be able to see where the two door latches are locked in place.With a screwdriver,you can push up on the bottom latch and the door will open. All this can be done without spilling the milk inside.Just slide the microwave around slowly to get to the screws.The broken part inside should be able to be replaced.Contact repair parts center.

Posted on Nov 06, 2007

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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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How can I replace/fix the button spring?

remove the outer case and look for the button spring inside / OR take it to a repair shop .

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Door latch

see this causes and fix it. God bless you
Open Lever If the microwave door won't open the open lever might be broken. This part can be replaced separately.

Door Spring If the microwave door won't open the door spring may have broken. The door spring is located inside the door and keeps downward pressure on the door hook.

Door Latch If the microwave door won't open the door latch might be broken. The door latch is inside the microwave. The door hook, which is part of the door, engages with the latch to keep the door closed during operation. If the door latch or actuator breaks the door may not open.

Door Hook If the microwave door won't open the door hook might not be releasing properly. The door hook is installed inside the door and normally releases when the door is opened. The hook is made of plastic and will break over time. When this happens it will need to be replaced, it can't be repaired.

Button Spring If the microwave door won't open the button spring might be broken internally. The button spring can be replaced.
Button If the microwave door won't open the button might be broken internally. The button can be replaced.

Handle Actuator If the microwave door won't open the handle actuator might be broken. This is a plastic part which can become brittle over time. This part is connected between the door button and the door latch assembly.


Oct 15, 2012 | Samsung SMH9187 Microwave Oven

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I have a Panasonic Model #NN-S255 microwave oven. The button you push to open the door does not open the door. It's like there is no resistance when you push the button therefore it does not push up...

Hello,To get the door open and salvage your dinner, take a long thin blade ( I used a frosting spreader) and insert from the bottom between the door and the oven frame on the side with the latches (usually next to the control panel). You may have to pry the bottom of the door open just a bit. The object is to push up the lower door latch (which is connected to the upper door latch) and manually open the door. You may have to try a few times but this worked perfectly for me and saved dinner. Obviously the door latch needs to be repaired but this solves the immediate problem of dinner being held hostage by a recalcitrant microwave.
wish you good luck,
take care.

Aug 02, 2011 | Panasonic NN-S255 Microwave Oven

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

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.

Aug 04, 2010 | Microwave Ovens

1 Answer


IMHO this is an expensive microwave and it is pretty poor that the door mechanism is so weak considering that it gets constant stress from opeing and closing the door and especially since the part that breaks is integral to the expensive control panel. I have the same problem with my microwave after only 2 1/2 years of use. After some fiddling I got it apart as follows. Remove the three screws that hold on the top grille (above the door) on and lift off the grille. Turn off the power to the microwave at the switch panel. Remove the two screws above the control display that are now visible after removing the top grille. Do NOT pry this panel off, slide it upwards to unlatch the hooks and lift it off carefully. There are a lot of wires which you will have to unplug (note their locations although none of the plugs are interchangeable) and separate the panel from the microwave. You can now check the latch itself and open the door by putting your finger under the lift latch and genly pushing upwards. If the door won't open the problem is in the latch mechanism which can be removed by taking out the two screws on the inside of the case an unplugging the many wires (note locations, a couple of them can be plugged back in the same place). If the problem is the same as the one I had it is in the actualy release button assembly where one of the brackets are broken. You will either have to replace the whole display & control panel or glue the bracket back together. I'm in the process of trying to glue it with epoxy but I can't vouch for how reliable the repair will be. Remove the screws that secure the control panel metal reinforcement and unplug the flat cable then remove it carefully. If either of the plasting pivot brackets moves it is broken. With the metal plate removed the problem should be obvious.

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