The push to open door handle on the model #KCMS 122Yal-0 (1995) built-in microwave sticks and won't open without pulling on door from underneath applicance

It sounds like the door spring had broken. Take the covers off and it should be apparent what had happened. It may be a part you can get at the hardware store or it may be an OEM part.

on my microwave, the door sticks some times & I put my fingers under door on latch side & push up, & I can hear it release & open. other than that there may be a broken part. follow the link below.
KitchenAid Microwave Door Won Open

Good afternoon friend, thank you for the post!

I understand that you are stating the door open button is continuing to get stuck on your Frigidaire microwave. I would like to ask some additional questions to make sure I can provide additional assistance. First, which button are you referring to that is sticking? When I pulled up your model FGM0205KBB, I do not see a door open button. Could we verify the model number is correct? Once I have that information I look forward to assisting you. -Matt

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.

you'll have to remove the molding and the handle clips in to place and also has to screws that hold it in place, after that reassemble the door outside trim.

I've never liked the push button ones I 've always purchased the door with a handle and you pull and push to open and close the door

You should be able to find the right kit by calling 1-877-477-7278 with your full model number.

Your complete model number will be KCMS1555SBL0, KCMS1555SSS0, or KCMS1555SWH0 without the spaces.

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

The microwave has a safety door switches (2-3 micro switches)
The door mechanism should hit these micro switches. If you can open the machine, you can see that these micro switch has a holder that you can adjust and tighten to make sure that the hook of the door should activate them.

I have the same issue. The Handle broke off my GE Microwave Oven (Model JVM1190SY 001). GE does not sell the handle seperately from what I can tell. I just ordered a new door. It's rediculously expensive. I tried to replace the handle with a nice drawer pull but couldn't find a size pull to match and I broke the plastic cover trying to get access to the screws for the handle, which is why I decided to buy the new door. Hopefully installation is not that difficult. This oven was manufactured in 2001, seems the handles have a 7 year life span.