GT4175SPS4 Whirlpool Microwave - Instructions

Took microwave out of builtin cabinet with 4 screws.
Put microwave on center island and removed cover.
Tested interlock switch with volt meter and it appeared ok so I put my kit back in box and sent back.
Took out magnetron unit and replace with new part.
Put cover back on and test.
All is working and installed back in cabinet. Two weeks later all still working great.

Remove outside cover of microwave.Note that there are 3 unique security screws that you will need a special screwdriver to remove. There is a YouTube video that shows how to install new part. Although this was a lot cheaper than buying a new microwave the cost of $57.00 plus shipping for this 3 inch plastic part was ridiculously expensive.

The instructions on the website were incredibly easy and I saved myself a lot of headache by using this site.

-it was built in unit - so I needed to pull the decorative grill from around the outside to remove it from the wall
- removing the back of the case involved removing phillips head screws from along the side and back of the unit. the only issue I encountered on removing screws was the fact that the "torx / star" screws could not be fit with the wrench that I had (they had a pin in the center that would not allow the wrench to fit into the star). However, a pair of pliers was handy and they were removed just easily.
- I had ordered both the high voltage diode and magnetron because I didn't know which item was the problem. I grounded the diode with two screwdrivers while wearing rubber gloves to be safe. the warnings on this did the trick as it was the only scary part of the operation.
- the diode was a little hard to spot looking at the schematics, but is is found on the lower right corner of the right side of the panel and easily pulled out and replaced. I tried the microwave again to see if it worked...and it did not. So I confirmed that the magnetron was the issue.
- removing the screws for the magnetron and putting in the replacement was a dead easy and I tried the microwave again before putting cover back on. Worked like a charm. Super easy!

I took the microwave out of the cabinet compartment and placed it on the counter. I removed the torx screws from the back and the two phillips head screws from each side. I then pulled the cover back and off. I removed the broken latch piece by pushing it away from me until the outside nipple was free and then pulled the piece out. I opened the door by pushing up on the latch with a flat head screwdriver. I put the end of the new part into the area behind the latch and on top of the microswitch and pushed until the outside nipple would slide into the slot. I then replaced the cover and secured with the screws taken out initially. Done.

The power on the microwave went completely out when I went to use it, but there was no power failure for the house or neighborhood. We removed the microwave from above the oven. Took out the screws on the sides and back of the microwave and slid the top back. The line fuse was located on top unobstructed, NOT behind the button panel like some microwave models. As the appliance is over 20 years old the line fuse was quite old. It was really hard to pry it out of its holder and actually broke. I used a vacuum to suck up the dust and glass and it was easier to get out the ends once the middle broke. Popped the new line fuse in, slid the top back on, put in the screws and put the microwave back in its compartment above the stove. Good as new!! We were about to spend money on a new microwave, but thankfully I came across this site. So happy I did!!

This repair was really easy. The part that took the most time was taking it down from it's compartment above the oven and putting it back up there once repaired.

Watched a you tube video prior to installing new switch. Followed the video which gave me confidence i was up to the task. After removing the touch pad I found my design was not exactly like the you tube model but I found the defective switch, replaced it and put the microwave back together. Works great. Again watch the videos

The lack of magnetron operation was immediately diagnosed as a door switch problem. This as a cheap and quick repair, simply removing some of the cover screws (some of which are security-style Torx) on the back and right side of unit. It is not necessary to remove the cover completely, just to gain enough access to swap the micro-switch in. The microswitch itself is retained by plastic tabs, and a plastic dowel. The wires are spade connectors that are very tight, and may require needle-nose pliers to manipulate. The enabled the oscillation circuit (magnetron) to engage.

However, the turntable still did not turn when the magnetron was activated. Removing the turntable and support assembly, the turntable support was damaged at the coupling socket to the motor. A small straw was affixed over the motor to ensure it was still spinning, but it was found to have failed, as well. A new turntable support and motor were ordered and installed. It required completely removing the top and bottom covers. Be careful not to remove the bolts for the transformer, attached to the bottom cover in the right side with different style bolts than the standard cover screws. This will allow the transformer to move, and as it is very heavy, it can damage wiring or other sensitive parts. Once the bottom cover is removed, the motor is easily and quickly removed by removing one screw and tilting the motor housing around a retaining tab. Assembly is reverse. Aligning all of the the cover tabs simultaneously is the most difficult part of the process.

Removed M/W oven case/cover. Identified part needed. Found part online with in 2 minutes, ordered new door latch actuator, installed with part arrived within two minutes, reattached case/cover, reinstalled M/W.

Replaced Door latch Bracket.
Filed a bit off the bracket connection fingers so to fit into the slot.

Remove from cabinetry, take cover off and had a very difficult time removing the plastic form that has the switched in. Replace the lowest of all the switches, and then again very difficult time getting the plastic form back in. Some of the plastic even broke during the process but not any that could prevent it from working as it did before. I had ordered a fuse, 2 packs of 2 switches as there are 3 switches but only had to use 1 to get it working again. Tested after switch install, put the cover back on and reinstalled in the cabinet.

1.ordered the part 2.during wait time for part,i epoxied the broken ear of the door latch bracket back on to the broken part.3.waited 24 hours for epoxy to set,4.installed the repaired part.5.reassembled the microwave and reinstalled in the wall unit.6.days passed and the ordered door latch bracket finally arrived.7.we are using the microwave daily with the repaired door latch bracket,but we will keep the new part in reserve,just in case!JUST CAN NOT DO WITHOUT OUR MICROWAVE!

Well, first of all I luckily picked your website after it had broken that day, got all the info, ordered that day, and got it the NEXT day and my husband fixed it that day. VOILA!! That may never happen again, but that was the easiest thing we have ever done. You can better bet we will be ordering from this website again,as well as letting others know about it. Very impressed, and yes, this is real.

I ordered the part from partselect (PS972837 Door Latch Bracket) and read all the instructions written here, very easy to do! Saves me a lot of money!

Since others reported similar problems and it was just the fuse we tried that first. That wasn't the problem so we ordered the Door Interlock Switch Kit. Shipping was very fast! Our microwave had 3 switches. My husband asked how to know which one to switch. I read that one person just did process of elimination. Luckily ours worked on the first change out! So happy to have stumbled across this site and not have to buy a whole new microwave.

The only reason it took over 30 minutes was that the unit is a built in over the stove type installation. The special Philips like screw driver which I purchased was the wrong size. I had to use a small vice grip tool to remove and reinstall these screws. The suggestion to use a butter knife to spread the slot was a good one. The delivery from part select was amazing. We were not without our micro more than a few days