KitchenAid KHMS155LSS 1000 Watts Microwave Oven Logo
Connie Ward
Connie Ward Posted on Nov 27, 2012
Answered by a Fixya Expert

Trustworthy Expert Solutions

At Fixya.com, our trusted experts are meticulously vetted and possess extensive experience in their respective fields. Backed by a community of knowledgeable professionals, our platform ensures that the solutions provided are thoroughly researched and validated.

View Our Top Experts

How do I get to the fuse in my microwave

How much do I have to take apart to get to the fuse to test it to see if it is the cause of my microwave's power failure?

Answer This Question

1 Answer

William Miller

William Miller

Level 3:

An expert who has achieved level 3 by getting 1000 points
Superstar:

An expert that got 20 achievements.
All-Star:

An expert that got 10 achievements.
MVP:

An expert that got 5 achievements.

  • KitchenAid Master 9,179 Answers
  • Posted on Nov 28, 2012
William Miller
KitchenAid Master
Level 3:

An expert who has achieved level 3 by getting 1000 points
Superstar:

An expert that got 20 achievements.
All-Star:

An expert that got 10 achievements.
MVP:

An expert that got 5 achievements.

Joined: Sep 15, 2006
Answers
9179
Questions
3
Helped
4479592
Points
21747

It of course depends on your full model number, but since you posted under the model KHMS155LSS, I'll assume that's it.

You have to remove the grille across the top and may have to remove the control panel assembly.

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.

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

In this model, there is one fuse (20A) and two thermostats which can be defective, any of which will render the oven dead.

Dead meaning no display, no light when you open the door, and no response when you press a pad on the keypad.

There should be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, testing, and locating components.

I have a copy in my files if you don't find yours.

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

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1helpful
1answer

I have a GE JKP62G microwave-oven combo. The oven works fine. The microwave blew the 15 amp fuse. When I replaced the fuse, per your earlier directions, and tried to use the microwave, the new fuse blew....
Cause 1
If too much current passes through the microwave circuitry, the line fuse will blow. If the line fuse blows, the microwave won’t start. To determine if the line fuse is at fault, use a multimeter to test it for continuity. If the fuse does not have continuity, replace it. In addition, you should investigate and resolve the problem that caused the fuse to blow. If you don’t resolve the underlying issue, the new fuse will blow too

Cause 2

Main Control Board

The main control board might be defective. However, this is rarely the case. Control boards are often misdiagnosed—check all of the more commonly defective parts. If you have determined that all of the other components are working properly,replace the main control board.

Cause 3

Thermal Fuse

The thermal fuse cuts off power to the microwave if the microwave overheats. To determine if the thermal fuse has blown, use a multimeter to test it for continuity. If the fuse does not have continuity, replace it. The thermal fuse cannot be reset—if the fuse is blown, it must be replaced.

Since its a electrical isue cal a liscenced professiona to resolve the issue . Your microwave oven isnt at fault . I belive the supplay to it has issue and would have blown anyway.
Read full answer
May 29, 2018 • GE Microwave Ovens
tip

Micorwave ovens - and where's the heat?
A microwave not heating up is caused by one or more of the following -

1) Failed controller board (unlikely if you are getting a clock readout and you can get the various functions to work, just no heat)
2) Failed door switch
3) Failed thermal fuse, when used
4) Blown power fuse that is dedicated to the microwave circuit
5) Bad diode
6) Bad capacitor
7) Bad magnetron
8) Bad transformer

Door switches insure the microwave circuit will not engage when the door is open. Slamming the door of the microwave is hard on the switch.

The thermal due is wired into the microwave harness, and is a melting allow type, based on heat buildup within the oven. Always replace with a fuse of the same thermal rating.

The power fuse is a special type and should only be replaced with that same type and rating. It is easily tested.

The diode is a relatively inexpensive part, and is not easily tested. If a grumble is heard coming from electrical area of the unit, then the diode could be shorted.

A shorted capacitor will blow the fuse immediately. And open capacitor will cause a "no heat" condition.

A bad magnetron will also cause a low level hum or grumble from the transformer. But is may also cause no other identifiable symptom of failure.

A bad transformer will exhibit a grumble or hum, and may or may not blow the fuse. But be careful here, the secondary of the transformer produces very high voltages, up to 2.5Kv. Few people own a meter capable of measuring such voltages.

Service and repair of microwave ovens is dangerous work. If you don't know what your doing, DO NOT ATTEMPT TO SERVICE A UNIT WITHOUT INSTRUCTION.
Read full tip
on Feb 04, 2009 • GE Spacemaker JVM1640SJ Microwave Oven
1helpful
1answer

Replace thermal fuse for LG microwave LMV1813ST
If too much current passes through the microwave circuitry, the line fuse will blow. If the line fuse blows, the microwave won't start. To determine if the line fuse is at fault, use a multimeter to test it for continuity. If the fuse does not have continuity, replace it. In addition, you should investigate and resolve the problem that caused the fuse to blow. If you don't resolve the underlying issue, the new fuse will blow too. (Caution: The microwave oven can store thousands of volts of electricity in its high voltage capacitor, even after the microwave oven has been unplugged. Due to the potential for electric shock, it is extremely dangerous to replace the electronic components in a microwave. Only a licensed technician should replace the line fuse.)
Read full answer
Sep 28, 2015 • LG Over-the-Range Microwave
1helpful
1answer

What could cause a microwave to have no power? Model MX3184XPS-3. Could it be a fuse?
Failed circuit board or microwave gun

Take it apart & see if the front control panel
looks or smells burnt
Read full answer
May 12, 2014 • Whirlpool Microwave Ovens
0helpful
1answer

Turns on but no heat. ? is there a fuse we can replace and where is it?
A microwave not heating up is caused by one or more of the following -

1) Failed controller board (unlikely if you are getting a clock readout and you can get the various functions to work, just no heat)
2) Failed door switch
3) Failed thermal fuse, when used
4) Blown power fuse that is dedicated to the microwave circuit
5) Bad diode
6) Bad capacitor
7) Bad magnetron
8) Bad transformer

Door switches insure the microwave circuit will not engage when the door is open. Slamming the door of the microwave is hard on the switch.

The thermal due is wired into the microwave harness, and is a melting allow type, based on heat buildup within the oven. Always replace with a fuse of the same thermal rating.

The power fuse is a special type and should only be replaced with that same type and rating. It is easily tested.

The diode is a relatively inexpensive part, and is not easily tested. If a grumble is heard coming from electrical area of the unit, then the diode could be shorted.

A shorted capacitor will blow the fuse immediately. And open capacitor will cause a "no heat" condition.

A bad magnetron will also cause a low level hum or grumble from the transformer. But is may also cause no other identifiable symptom of failure.

A bad transformer will exhibit a grumble or hum, and may or may not blow the fuse. But be careful here, the secondary of the transformer produces very high voltages, up to 2.5Kv. Few people own a meter capable of measuring such voltages.

Service and repair of microwave ovens is dangerous work. If you don't know what your doing, DO NOT ATTEMPT TO SERVICE A UNIT WITHOUT INSTRUCTION
Read full answer
Jan 16, 2011 • GE JVM3670 Microwave Oven
0helpful
1answer

It made a loud pop while heating. Now everything works but the microwave does not heat. What is wrong and how can it be fixed?
A microwave not heating up is caused by one or more of the following -

1) Failed controller board (unlikely if you are getting a clock readout and you can get the various functions to work, just no heat)
2) Failed door switch
3) Failed thermal fuse, when used
4) Blown power fuse that is dedicated to the microwave circuit
5) Bad diode
6) Bad capacitor
7) Bad magnetron
8) Bad transformer

Door switches insure the microwave circuit will not engage when the door is open. Slamming the door of the microwave is hard on the switch.

The thermal due is wired into the microwave harness, and is a melting allow type, based on heat buildup within the oven. Always replace with a fuse of the same thermal rating.

The power fuse is a special type and should only be replaced with that same type and rating. It is easily tested.

The diode is a relatively inexpensive part, and is not easily tested. If a grumble is heard coming from electrical area of the unit, then the diode could be shorted.

A shorted capacitor will blow the fuse immediately. And open capacitor will cause a "no heat" condition.

A bad magnetron will also cause a low level hum or grumble from the transformer. But is may also cause no other identifiable symptom of failure.

A bad transformer will exhibit a grumble or hum, and may or may not blow the fuse. But be careful here, the secondary of the transformer produces very high voltages, up to 2.5Kv. Few people own a meter capable of measuring such voltages.

Service and repair of microwave ovens is dangerous work. If you don't know what your doing, DO NOT ATTEMPT TO SERVICE A UNIT WITHOUT INSTRUCTION
Read full answer
Jan 16, 2011 • GE Spacemaker JVM1640SJ Microwave Oven
0helpful
1answer

The fuse blew on my emerson microwave oven and I replaced it. This fuse has now blown. What would be causing this? Thanks....Lee
Usually what happenes is the magnetron is dead, or is dieing. It is using too much power due to overheating, or it is just worn. This is a common thing for older microwaves. take the case back off, and clean the fins on the magnetron this will fix the overheating problem. Be careful. let your microwave sit for about an hour after being plugged in. This lets the capacitors that store dangerous voltages leak off. also make sure the new fuses are ceramic fuses that are rated for 15 amps at 250VAC Do not use glass fuses! You can find a new magnetron on ebay, or on the internet some where. You will need a DAEWOO 2M218H MFI magnetron. I just tore my microwave apart, and realized I have an exact replacement for it. I just swapped them out and they both work. cool. but yeah. that's what is most likely causing it. Good luck!
Read full answer
Sep 17, 2010 • Emerson MW8985W Microwave Oven
1helpful
1answer

No heat but everything else works
Sounds like the magnetron has failed. This is the component that produces the microwaves that heats the food.

The cost of the magnetron is about 95% of the cost of a microwave oven. Most people don't, for this reason, replace the magnetron, they replace the whole oven which is probably what you will end up doing.

There is a possibility that the circuit that provides power to the magnetron is faulty and you need to take it apart, find the proper electrical leads and test them with a volt meter. To do this you have to remove it from its mounting and take it apart. It is a fairly lengthy process however.


Benjamin
Read full answer
Apr 17, 2009 • Whirlpool MH7140XF Microwave Oven
0helpful
1answer

Cooking light inoperable, everything else working fine
just did further testing...I stated incorrectly before, appears to be one/both relays for this light
Read full answer
Nov 12, 2008 • Whirlpool MH1150XM Convection/Microwave...
0helpful
1answer

Emerson MW8107WA Microwave causing apartment fuse blow
It seems that something within the microwave must have fried in the power supply unit. This should not be a very expensive repair, However, get a technician t take a look and give you a rough estimate before you decide to repair.
Read full answer
Dec 17, 2007 • Emerson MW8107WA Microwave Oven
Not finding what you are looking for?

View Most Popular

KHMS155LSS 1000 Watts Microwave Oven

  • Microwave Ovens

Related Question

I have a GE JKP62G microwave-oven combo. The oven works fine. The microwave blew the 15 amp fuse. When I replaced the fuse, per your earlier directions, and tried to use the microwave, the new fuse blew....

  • GE Microwave Ovens

Related Topics

61 views

Ask a Question

Usually answered in minutes!

Popular Questions

Method of baking a cake in Microwave

KitchenAid KHMC107BT...

Need to Replace Door Handle for KitchenAid Over Range Microwave Hood Combo KHMS147KSS

KitchenAid KHMS147 Microwave Oven

LIght bulb burned out

KitchenAid KBMC140HSS...

KitchenAid Microwave Touch pad stopped working. Spoke to a technician and told me that you have to replace the complete door. Is this true??? Part No. AP4500800 Mfg Part Number W10282802 Microwave mo

KitchenAid Microwave Ovens

Loose microwave door

KitchenAid KEMC377K Convection /...

Top KitchenAid Microwave Ovens Experts

ZJ Limited
ZJ Limited

Level 3 Expert

17989 Answers

Brad Brown

Level 3 Expert

19187 Answers

john h

Level 3 Expert

29494 Answers

Are you a KitchenAid Microwave Oven Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

PDF Manual
. KHMS155LSS 1000 Watts Microwave Oven...

KHMS155LSS 1000...

Loading...