MH1150XMS4 Whirlpool Microwave - Instructions

I had some difficulty removing the glass plate because of the awkward (upside down) position of the screw that retained it. After replacing the burned out bulbs and replacig the glass plate the problem of replacing the screw involved my dropping the thing several times before I got the screw threads to catch. I got a screw thread to catch enough to hold the glass plate in position and left it at that.

The hard part was trying to find the light bulb locally. The locally sold light bulbs were either too long, not dual element or not powerful enough. So I ordered the light bulb straight from PartSelect. When it came time to install the new light bulb I carefully removed the screw holding the plate in position so as not to loose it in my gas stove. I needed the mirror to line up the light bulb and screw it in. Once it was in I verified operation and closed up the plate being careful not to drop the screw into my gas stove. Problem solved.

I found the part number for the mount on the appliances company website. Once I had that I visited a few sites looking for part. This site was easy to use and priced right, so I ordered. A few days later the product arrived as promised and worked perfectly for the install.

I made a video. There were specific instructions to note which needed to be explained. Interested?

Read some instructions and easily found the fuse. Replaced it. Still didn't work. Took control panel off to check door switches. Nothing I read mentioned a second fuse. Tested and it to had blown. Ordered another one. Popped them in. Done.

KitchenAid Microwave [Model: KHMS 145 JBS-0]Door Handle Repair
Tools and Parts
• Door Handle [Part # PS390101]
• Putty Knife
• Phillips Screwdriver
• Tray (cup) for parts during disassembly/reassembly (3 screws on door; 2 screws on handle; spacer on top-door edge).
Instructions
• Preparation
o Disassembly can be managed with the door mounted on the unit. The handle is attached by 2-screws that can be accessed only by separating the outer/inner door panels.
o Before starting the project, watch the Youtube.com video for a GE Microwave, which is the most applicable video for removing the collar [i.e., plastic bezel around the viewing window on the inner door) and for separating the outer/inner door panels ].

• Remove the collar
Photo 1: Inner-side clip (bottom of collar) used on
3-sides of the collar (top edge is a spacer) Photo 2: Hinge side clip (right edge)

o As indicated in the video, small clips are on the inner-side of the collar on 3-sides (top, bottom, and open-door edge).
o The clips are on the outside of the collar for the door-hinge side.
o These clips are small and somewhat fragile – once a few are popped, finger pressure will generally pop the remaining clips.


• Separate the outer/inner door panels

Photo shows the inner/outer doors separated, and the 3-screws removed.
o Remove the 3-screws on the door edge before separating the outer door panel.
o There is a plastic spacer on the top, outside edge of the door that is not cemented. Remove the spacer after separating the door panels.
o Use a putty knife to pop the clips for the outer-door panel around the top, bottom, and open-door sides.
o The top door corner (the spacer edge) is tight and should be gently pushed back.
o The outer door panel will remain attached on the hinged edge and function like a second door – move gently.
o The viewing glass is clamped in place; but, handle with caution.

• Remove the Door Handle
o With the outer/inner panels separated, remove the two screws holding the handle and remove the handle.
o Retain the screws for later use.

• Install the new Door Handle
o Reuse the original screws (Note, [Part # W10841091 – screw] is a different thread, and is not self-tapping)
o The door-handle screw holes are not tapped; so insert the old screws in the handle to tap before installing the handle, leaving approximately 1/8 - 3/16” exposed.
o Remove the screws and reuse to install the handle.


Comparison of 2-original screws vs. replacement screw (note thread gauge differences).
• Reinstall the Outer Door Panel
o Align the spacer with the inner-panel edge in the upper corner.
o Close the outer panel, gently snapping the clips into place.
o Reinstall the 3-screws on the door edge.

• Reinstall the Collar
o Snap the hinge side in place.
o Gently snap the remaining sides in place

I looked up a YouTube video of someone with a similar over the oven microwave. That helped me get into the area behind the control panel where the door switches are. I checked the springs and the cam rocker? The thing that actually hits the button on the switch when the door closes. They were in good condition so I assumed the door switch was bad. There are two so I just purchased one figuring (hoping) that only one was bad. And lo and behold only one was bad. Bing bam boom. Put it all back together and I'm set. Not too difficult. Took a week of work because it takes like 50 days to ship. My kitchen looked like a hurricane after image because of all the parts scattered everywhere.

Instead of telling you, i have question do you have any instructions on how to do the repair. It would have helped save time on the repair.

This job took longer then it should have, becasue I did not start right in the begining. I did figure it out quickly after the wrong start.

You were a big help in picking the right part to correct the problem. You should be able to help with the repair. Thank You

I ordered the part according to the Model number, inserted the part very easily, (and I am soooo challenged in that area) and now it turns again. :)

I turned off the power to the oven at the breaker. I then removed the side trim pieces by removing the screws located behind the lower oven door. I removed the plastic trim pieces above and below the microwave oven and removed the control panel and slid it into the opening above the microwave. I located the two screws securing the microwave into the frame and began sliding it out. I had to disconnect a small wiring harness and two wires from the microwave that were attached inside the opening above the microwave. The microwave section was the easily slid out, turned on it's side where the turntable motor was accessed by removing the access panel. I pulled the old motor, checked resistance and it matched the new motor. I then checked the old motor by applying 120V to it and it ran FINE! I thought I had the wrong part, but decided to install the new motor anyway. I did, secured the access panel and replaced the microwave in the frame. I reconnected the wires and secured the control panel and tested the microwave...and the turntable works!

Replaced bulb by: 1 pulling plug on microwave to make sure not hot - no power; 2 used needle nose pliers with head part about same size that fit inside of socket; 3 opened pliers and held firm against broken metal part; keeping pressure of pliers against broken metal part of light bulb, slowly unscrewed the broken part from socket using firmly held opened pliers. The rest was a cinch...just screwed in new light bulb, plugged in microwave and viola - there was light once again.

I used a Google search to show how to access the area behind the front panel. There was a folded paper copy with a schematic and wiring diagram in that space.Then I used a multi-meter to determine which of the THREE micro-switches was causing the problem. I called your help line and ordered a replacement switch. The switch was delayed in transit so your agent credited me with the cost of shipping.

When the part arrived, it had three terminals instead of two as shown in the on-line picture but that did not cause any difficulty in using it. It took about 20 minutes to remove and replace the old switch.

All seems to be working well now.

Finding which of the THREE switches was the problem was the most difficult part of the repair. All three "clicked" but the defective one did not click as easily. It needed to be depressed more than the door latch can would provide. Old age?

Removed screws holding the broken grill tabs with a phillips screwdriver
Removed broken grill and all broken tabs that fell into the vent area
Cleaned area where the new grill was to be placed
Inserted new grill onto the appropriate tabs and tightened the screws

BE CAREFUL as the tabs on the grill are thin and fragile when you insert the new grill don't force it into the slots, I used a knife as a way to slide the grill into place.

removed the two screws, removed all of the broken tab pieces, replaced with new grill, put the two screws back.,....DONE Easy as pie

After reading other entries, I have determined this is a problem with most grills on the whirlpool microwaves. Defective material ..becomes brittle and crumbles.

It was a bit awkward because the microwave is mounted over my stove. I had to twist around and install the bulb and then replace the cover. It was a bit uncomfortable. It took me about 10 minutes to complete.