20 Most Recent KitchenAid KHMS145J Microwave Oven Questions & Answers

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Hi,
One or some of the high voltage parts inside have gone bad. It then blows a fuse which stops everything.
The fuse could be replaced, but that would be a temporary fix most of the time.
Do not try to repair a microwave yourself as there are dangerous voltages inside that can kill you!!

If you want to try to get it repaired it is best to find a local shop that will do it for you.

Microwave Oven Basic Troubleshooting Tips

heatman101

It indicates you have a short in one of the three items, the magnetron, or high voltage capacitor, or the high voltage diode, one or more will cause an instant shutdown when you try to cook, you will need a tech to determine the problem and cost.

You have a failed humidity sensor.

You can find helpful exploded view diagrams and order parts by entering your full model number from the tag on the oven here.

It will be KHMS145JBL0, KHMS145JBS0, KHMS145JBT0, or KHMS145JWH0.

There should also be a "mini-manual" hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, & testing.

At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

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

Hi, Pot of water did nothing it just broke... Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101

Hi and welcome to FixYa. I am Kelly.

Most of the time when the microwave is in use and just quits either the Power Diode or the capacitor has failed and blows the fuse inside the cabinet. (Yours is probably NOT blown.)

Diode:
http://www.appliancepartspros.com/part_details.aspx?part_id=4310285

Location Item 19
http://www.appliancepartspros.com/partsearch/model.aspx?model_id=260502&diagram_id=94048#d94048

Capacitor: (Location Item 20 above link)
http://www.appliancepartspros.com/part_details.aspx?part_id=4295779
Since you unplugged the unit before the thermal fuse blew you were very wise: (Item 28 of interior diagram)
http://www.appliancepartspros.com/part_details.aspx?part_id=4308182


With the unit unplugged and the chassis cover removed the fuse will be located at the end of the power cord lead in a fuse holder. The fuse is usually a 15A 250V slow-blo fuse. Just replacing the fuse will normally result in the fuse failing yet again.

STOP! Before going any further you must hold a well insulated screwdriver back on the handle and short across the High Voltage Capacitor at least 3 times! Failure to do so could be the start of a very bad day in the form of a horrible shock.

Next you disconnect one side of the cap including the power diode wire. With an analog meter set on R x 1,000 read the Cap terminals watching for a jump. Reverse the meter leads on the terminals and watch for a jump EACH time you reverse the test leads on the CAP terminals.

No jump = bad cap.
Constant resistance across the cap = bad cap

Lastly you check the power diode with the meter on the same settings R X 1,000. One direction will read full continuity (ZERO) and reversing the leads will read infinity. (no reading)

If the diode reads open both ways = failed
If the diode reads (ZERO) both ways = failed
It must read continuity in ONE direction only.

After finding and replacing the failed component then you can change the fuse and test the microwave.

There is a very very remote possibility that a door switch has failed but given that your microwave failed while in use I seriously doubt you have a door switch problem.

As far as finding replacement parts for your microwave nearly every appliance parts store will have what you need if you walk in with the failed part in hand. Most of the time they will walk back and grab the part you need without even digging in the parts books.
These are the most common failures when a unit quits working while in use. Yes I believe your unit is repairble at a very reasonable cost.

Thanks for choosing FixYa.

Kelly

the buzz noise is generally a diode or capacitor problem, capacitors generally will buzz. Definitely worth looking at. Look for a burnt diode or a capacitor with a bulging top with the power off.
Otherwise the magnetron may have gone out and then you are just better off replacing
let me know what you find Benjamin

Go HERE

You have a shorting membrane keypad.

If you (or someone you know) might want to replace it yourself, I have uploaded a handy guide with pictures showing you what's typically involved.

You can usually find helpful exploded view diagrams and order parts by entering your full model number here.

There should also be a "mini-manual" hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting & testing.

If you would like to have us do this for you, we do that for $39.95 plus part costs, about $55-65 in this case.

Feel free to contact me directly (and please remind me of your full model number) for more information & help.

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

William E. Miller
[email protected]
http://www.microwavedisplay.com

Doors for microwave ovens are usually replaced as a complete item. I would ask the person who forgot to fix the door latches properly back to fix it properly. If some of the clips were snapped off when removing the door panel, the panel must be replaced or it will fall out again.

I am a bit late on this question, but just ended up in a rabbit hole of unanswered Kitchenaid questions The self cleaning features only serves to keep manufacturers in steady sales of parts. Quite simply the oven can only take those temperatures a few times until they break. The heat burns out elements, damages fans, door locks and worst of all damages control boards which are not far enough from the heat source. You problem sounds like the walls of the oven have buckled in the heat so the racks no longer fit. Too late now, but you should have taken Kitchenaid to court, the oven was not fit for purpose under the description they used to sell it to you. Never use the self cleaning feature as stated here https://www.google.com/search?q=self-cleaning+oven+temperature Never Ever use the self clean feature. We see damage here every couple of weeks. The worst was a burned control board on an oven that all parts were obsolete, so the self clean cost a thousand bucks! Self-cleaning ovens bring the heat so you don't have to spend hours scrubbing. Traditional self-cleaning cycles heat the oven between 800°F and 900°F, helping turn soil and spills to a powdery ash you can then wipe away. They utilize only heat-no chemicals-and are built to withstand high temperatures. (Says Maytag who love selling elements, door locks and other parts),

Why You should Never Run A Self Clean Oven Cycle & ...

General Appliance Servicehttps://www.generalappliancesvc.com > why-you-shou... Jan 29, 2020 - A self-cleaning oven is a feature on many modern ovens that burns off cooking spills and splatters with an extremely high temperature (932 F° or ...

Self-cleaning oven

Wikipediahttps://en.wikipedia.org > wiki > Self-cleaning_oven A self-cleaning or pyrolytic oven is an oven which uses high temperature (approximately 932 °F (500 °C)) to burn off leftovers from baking, without the use ... ‎Pyrolytic process · ‎Alternative technologies · ‎Catalytic cleaning

Self-Cleaning Oven: 6 Reasons to Stop Using Feature ...

FIX Appliances CAhttps://fixappliances.ca > 4-reasons-stop-using-self-cle... A self-cleaning oven is a feature on many modern ovens that burns off cooking spills and splatters at an extremely high temperature (932 F° or 500 C°) to aid in ... ‎How Self-Cleaning Ovens Work · ‎Major Parts Damage ..

Yes it should do, but they are very dangerous to work on. https://www.google.com/search?q=Kitchenaid+microwave+f4+error https://www.fixya.com/support/r29874712-repairing_microwave_ovens ..

Open the control panel using this diagram Official KitchenAid KEMC377KSS05 wall oven/microwave combo parts ' Sears PartsDirect Check the cables and connectors. If Ok then problem is in cuicuit board.

There is a huge capacitor inside microwaves, and that description sounds like it is starting to fail. There are smaller capacitors as well. It won't be a door switch, they work or they don't. I had two Panasonic Commercial microwaves in a pub kitchen, one plain and one was a combination machine and both had drop down doors.