GMC275PRQ01 Whirlpool Microwave Oven Combo - Instructions

PartSelect website indicated replacing the high voltage power supply diode is the solution for "no heat" 99% of the time, but the diode was OK. There is more info at the website concerning the case of "loud buzzing and no heat" indicating the magnetron needs to be replaced. As an electrical engineer with knowledge of microwave components, this was also my best guess. However, getting to the magnetron is not the easiest job, but it's not impossible. You also have to be careful to bleed off any charge stored on the high voltage power supply capacitor. Luckily, I found my KitchenAid service manual tucked away inside the unit since I couldn't find it online.

This oven probably was manufactured in the '60s when the house was built. The door doesn't just pull off like the newer models. These pins fit into small holes on the oven hinges. I inserted the pins and lifted the door to a 45 degree angle, before pulling the door completely off. Now that turned out to be the easy part. I then proceeded to completely dismantle the door. It actually has 4 glass layers which had to be cleaned individually. The hardest part of all was actually remembering how to put it back together again. I put the door back on just as I had removed it, then took out the pins, and I was finally done! This was not an easy project, BUT the results look great.

Verify power is off to the oven, turned main power supply off for the oven at the breaker panel, located the securing screws for the defective element, used a Phillips screw driver to remove the screws, pulled the element slightly out unit wires are exposed, verify 0 volts at the element wiring terminals, used pliers to remove the wires to complete the uninstalling process, reinstall the element in the reverse order, restored power at the breaker panel

Fool proof.

I was able to remove the old element and planned it with what little time off that I could. This would have been maybe 20-30 minute repair at the most. HOWEVER! I was extremely irritated screws were not included? When I called to ask if they were missing they said they didn’t come with the element. Cost me a very annoying trip to the hardware store. Not sure if I missed it on the site that they don’t provide screws - would have been nice to know that before I started. Still scratching my head as to why screws wouldn’t be included? My old ones were as beat up as the element I replaced. I was so irritated I was looking for a spot to leave feedback. Product is fine. Shipping was fine. Sending these products out as they do? Zero stars on that.

Just put it in

I pinpointed the location of the sound, took off the protective plate, felt it vibrating against the plate. I disconnected the power supply, and looked at the wirings and how it was connected, saw some burning residue surrounding the area of the Transformer. Then figured that I could simply replace this. I wrote down the Model and Serial number of the Stove, searched online, found this site. Located the part on the diagram, then simply ordered it. My part arrived in 3 days, and had the part replaced the next day. Couldn't be a smoother fix. Thanks.

First remove the side trimmings by opening the oven door and taking out the two screws near the bottom. Remove the bottom trim by removing the two screws now exposed. Here's the hard part .. The outer glass is held by 4 screws 2 at the top and 2 through U brackets at the bottom. You must remove the 2 bottom ones first and then VERY carefully, whilst supporting the glass remove the 2 top ones and then gently pull from the bottom to release the glass at the top and pull away. The rest is straightforward. There are 4 glass pieces to remove, make sure you clean the finger marks off as you replace them. I would suggest 2 people to replace the final outer glass 'to be safe"

We followed the instructions given by Parts Service. The only problem we had (Whirlpool left two screws out of spacer bracket and it fell out requiring further removable of inner glass to replace spacer. Process took about twenty minutes.

I put the tray in the microwave???? Pretty easy.

Unplugged old element unit and plugged in new element. Took two needle nose pliers and a flexible body. Took about 5 minutes. Works fine. Anybody can do it. Make sure power is off at the box.

My oven (late 90's/early 2000's model) didn't have the flip-down hinge locks shown in the video. It seems Whirlpool/Kitchenaid changed the hinges even though they didn't change the model number of the oven. With my style hinges, you have to put Allen wrenches or bent nails in the holes just behind the hinge pins. Then close the door almost all the way and lift it out to separate the hinges. Spring force holds the nails in tightly until you replace the door. This video was very helpful:
https://www.youtube.com/watch?v=p7oRZdIN6m0

Also, my door had 3 different kinds of sheet metal screws. Two of them have similar heads but different threads. Keep track of which is which for when you put everything back together.

The tech said he used No 2 Phillip's. Once I took the door off and removed the racks I quickly learned a Phillips was not going to work. I am now the proud owner of a Kobslt star and square ratchet screwdriver.

Watched the repair video and started the project. Ran into a problem when trying to remove the interior panel off the door to reach the broken interior glass. On this model Kitchen Aid there is another section that is screwed in holding the exterior glass pieces in place. It prevents the interior panel from coming off the front of the oven door. So we had to flip over the door and unscrew the glass retaining bars to get the interior panel off and reach the glass. This allows the entire door to come apart in pieces so you have to carefully line up everything to re-assemble the door. Part of the issue with this is some of the retaining screws are not very long so you have to press the pieces back together to make sure the screw will catch in the original hole. We had to do this twice to ensure the interior door glass was laying flush on its mounts. A bit fiddly for sure, and if I was working alone it may not have been successful. But at least we know how the door is put together!

Thanks to video provided by PartSelect the repair was fast and easy. My second experience with an appliance repair with parts and video from PartSelect. I am a happy customer.