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Replace magnetron in a samsung smh7174

How to remove the magnetron in a samsung model smh7174

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  • Bigger D Apr 08, 2008

    The Microwave Is Noisy, and Does Not Heat,after a Spark was seen in the Top Vent,on A Samsung SMH7174

  • Anonymous Mar 08, 2009

    Unit has burned smell and does not heat. Previously have seen several incidents of magnetron sparking on the other side of the heating box.

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  • Microwave Ovens Master
  • 9,085 Answers

If you or a friend decide to look into it, we have critical safety information, info on door switch diagnosis and replacement, and disassembly information at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk

But essentially you unplug the power, remove the microwave from the wall mount and remove the outer wrapper / cover.

Discharge the high voltage capacitor and then it should be pretty straightforward, but please do read and heed the safety warnings.

We're happy to help and we appreciate your thoughtful rating of our answer.

Posted on Mar 04, 2008

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1 Answer

Samsung SMH9151W stopped working. Possible Magnetron issue.


Hi,

Test the thermostat to see if its open, this should be closed. If ok (I think it would be) replace the magnetron, this is common issue with all brand of microwaves. Magnetrons can fail or weaken over time and depending upon frequency of use. I hope this helps.

Dec 23, 2013 | Samsung Microwave Ovens

1 Answer

Samsung microwave malfunction


I too have this problem with my KitchenAid KHHS179LSS-5 model. Based on the owner's manual I located behind the grill which pulled off, the F7 Error code indicates that power to the magnetron was interrupted. You will want to make the following checks: 1. Unplug microwave oven or disconnect power. 2. After 40 seconds, check to see whether this solves the problem. 3. Unplug microwave oven or disconnect power. 4. Check resistance of the magnetron thermostat. 5. Check the magnetron. 6. Check wiring to the 1100W inverter and control system. See "Checking Inverters." 7. Plug in microwave oven or reconnect power. 8. Check operation of all interlock switches. Check door, hinge and cavity front alignment. Adjust as needed. 9. Unplug microwave oven or disconnect power. 10. If switches operate correctly, replace 1100W inverter. 11. If problem persists, replace electronic control. 12. Plug in microwave oven or reconnect power.

After removing the control display, there is a virtual zoo of connectors. So unless you repair microwaves on a regular basis, it may be difficult to ascertain which ones go to the magnetron thermostat. I will probably resport to shelling out the dough to get someone to fix it. Sorry I couldn't be more helpful.

Jun 27, 2013 | Microwave Ovens

1 Answer

The problem is no heating but the time is counting. Model MW840WF


If there is no heating please do not switch on unless you have confirmed the fault. It is possible that the Magnetron is faulty, the temperature cut off is faulty or the main capacitor is short.The processor seems to work but there is no output trigger or switch on of the magnetron. can be failure of the relay or the magnetron. It is also quite possible that insect can get into the oven and create soft spots. When you switch on these will create a short and make the voltage jump and in the long run damage the magnetron.
So Remove cover after disconnecting , check for dirt/moisture in the cabin, if so wipe clean and dry, check the magnetron and area clean and use an jet air to clean off.
Make sure that the program controller is working if not check power - step down supply, the pads are responding- if not faulty pads- or the door switches, if contact is not through the microwave will not work.

Now keeping clear of the microwave, switch on, use a cup of water inside to test.
If you notice any sparks shut off as the magnetron or the main HT capacitor can be faulty. replace with same type.
If there is heating without any issues, you can use the microwave safely

http://www.gallawa.com/microtech/mag_test.html

Jun 22, 2011 | Samsung Microwave Ovens

1 Answer

GE Spacemaker Microwave 5 years old Model JVM1440WH01 The Clock, Fan, Interior and Exterior Surface lights work, but it does not heat the food. Over the stove model,


the magnetron may be faulty on this unit... the magnetron is what heats unit... there is also a thermal limit on this unit mounted behind the control panel and will require removing in order to check... unplug unit and remove two wires attached to limit about the size of a quarter and round in shape..check contuinity and should be closed... if it is then most likely the magnetron has failed... is a replaceable part sorta expensive and requires taking apart the cabinet and removing a few componets to get to the magnetron bolts/screws ...
www.sears.com then hit the parts direct link up at top of the screen enter your model number and will give you a parts diagram check availabilty and price on your part....
sometimes cost verses replacement is worth buying another one.... but can be fixed... most magnetrons have 5 year warranty goes by serial number of unit or installation of unit if your the original owner.... good luck to you

Jan 26, 2011 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

I have a GE Spacemaker Microwave, Model # JVM165OCB006 Serial # TF900232B Manufactured 10/2003. Runs,turntable,light,timer etc but will not heat. Is it worth fixing?


it is mostly fault of magnetron tube inside Microwave. ge has a 10 year warrenty on this part and they can fix it for you for 200$ OR you can order the part from the web and install it yourself. when the magnetron goes out, the diode almost always goes out too so you'll need another of those too. so if you dont want to replace these then buy a new one if not the the steps to repairing are:

  1. Unplug Microwave at least few hours before
  2. Remove Microwave from above oven range by somebody holding Microwave from ground unscrew the screws from cabinet
  3. Remove top cover of Microwave
  4. Make sure to keep screws correctly in a place you remember what goes where
  5. Make sure capacitor is discharged, GE manual inside Microwave says capacitor will discharge within 30 seconds once it is off. As a precaution check the voltage in capacitor to make sure there is no electricity
  6. Remove other panels around magnetron part
  7. You need to remove lot of connecting wires, should be careful to note down what goes where
  8. If possible take digital photos to refer back when you put everything back together
  9. You may need to remove transformer to easily remove and replace Magnetron. If you can't remove Magnetron easily then remove bottom panel of the Microwave and remove transformer
  10. Now it should be easy to remove magnetron
  11. Replace new magnetron and screw it. We had to put one outside part from old magnetron to new one because new one was missing that. Check to make sure both old and new one are exactly the same
  12. Make sure put all wires properly back
  13. Now put transformer back and screw it
  14. Put capacitor panel in place and screw it
  15. This might be a good time to test the Microwave to make sure it works fine now
  16. Now cover the top panels and start to screw everything
  17. Once everything assembled put the Microwave back above range put screws from top

Dec 05, 2010 | GE Microwave Ovens

1 Answer

Light goes on, turntable rotates, time on displays counts down as per setting -- but no cooking. Nature of problem??


If everything works, but the microwave oven does not heat, this is most commonly caused by a failed magnetron. The magnetron is essentially, the heart of the oven that produces the RF energy that is used to heat your food. In order to replace a defective magnetron, you will need to consider the following:

1. You will need to uninstall the oven from over the range in order to replace the part (you will need to do this anyway, if you decide to buy a replacement oven).

2. Ensure the oven is UNPLUGGED before servicing anything inside the cabinet and remove the exterior case in order to access the magnetron.
There are several websites that you can use that illustrate how the oven is assembled:
searspartsdirect.com pcappliancerepair.com appliancepartspros.com
NOTE: If you've never repaired an appliance on your own before, a microwave oven is usually not a recommended appliance to start with. Some models can be rather involved in taking apart.
If the model number you posted this question under is correct, the magnetron replacement part number is WB27X10682. NOTE: This model also has two internal thermostats that, if tripped, could give you the same symptoms. The thermostat acts as a fuse if the oven cavity or magnetron overheats. The part numbers are as follows: Cavity Thermostat: WB27X10683 Magnetron Thermostat: WB27X10567 You will need to remove the thermostat from the oven and take a resistance check across the component terminals to determine if it is good or not. A low resistance reading indicates a good thermostat. An infinite reading, indicates a blown thermostat and needs to be replaced.
I would recommend you check both thermostats, first as the replacement cost is much less than the magnetron.


Review the parts illustrations at the recommended websites to see if this is something that you may be able easily take apart and reassemble.
If you have any questions, please post back and let me know. I hope you find this information helpful.
CAUTION: DO NOT operate a microwave oven with the exterior cover off. The voltage inside the High Voltage network where the magnetron is installed can exceed 3,000 volts!

Oct 27, 2010 | GE Monogram ZE2160SF Convection /...

1 Answer

Does'nt heat up


HI. in most cases, this will lead to a failed Heating device(magnetron tube).It would be wise to check the Magnetron cutoff fuse to be sure of its integrity. if the fuse is blown, simply replace it. if the fuse continues to show continuity, replace the magnetron.

(((The fuse is located inside the unit along side the magnetron)))

Aug 05, 2009 | Samsung Microwave Ovens

2 Answers

Micro wave shuts down in 3 seconds


This is almost always due to a defective or loose magnetron causing electrical interference and disruption in the control circuit board.

Details are
in their bulletin here.

If your magnetron was recently replaced, it may have loose mounting nuts or bolts or maybe the wire mesh RF gasket was not installed or got pinched.

NOISY MAGNETRON TEST (c) 2009 William E. Miller prototech@usa.net

One way to test it is to do the following:

1. Unplug the microwave or turn off its breaker.
2. Open the door, then detach the control panel as shown in the video at http://www.microwavedisplay.com and swing it down, but without disconnecting the wires. If you have any trouble getting the grille off once the screws are removed, slide the hood vent grille to the left about 1/4", then then pull it forward. On Samsung models there are L-shaped clips that fit into a slot to hold bottom of the vent.
3. Plug the microwave back in.
4. Make sure neither you nor anyone else reaches in behind the control panel. There will exposed high-voltage connections.
5. Put a few cups worth of water in a microwave-safe container and place it inside the microwave.

6. Shut the door.
7. Run the microwave for about 1 minute or so on full power. (Time Cook > 1 > 0 > 0 > Start, e.g.)
8. If it does not fail, try it several more times.
9. When the water boils, change the water and try again.


NOTE:
If your model does not have a door handle, you will need to unplug the oven and reattach the control panel to be able to open the door.


If it still does not fail, I would recommend that you put it all back together and keep using it until it fails more consistently, then repeat this test.

While a microwave should never be left running unattended under any circumstances (as your owner's manual will tell you) it's even more important when one is exhibiting a failure or any odd behavior. So play it safe and stay with it while it's running!

If you or someone you know want to replace the magnetron yourself, you will need to remove the oven from the wall.

If so, the installation instructions are very handy, and it's best to have two people since the microwave can be heavy and awkward.

You can download GE owner's manuals and installation instructions 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.

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

If it's within the magnetron portion of the warranty (usually 5-9 years) but out of the original full warranty (usually 1 year), then your manufacturer will cover the part cost, but not the cost to visit you or the labor charge to do the work.

Sometimes they will send you the magnetron to do it yourself. Call them at 888-239-6832.

Be persistent. You may have to speak with a supervisor.


If it is not within the magnetron warranty, you can find helpful exploded view diagrams and order parts by entering your full model number here.

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

May 24, 2009 | Samsung MS1040BB Microwave Oven

1 Answer

Microwave doesn't heat anything


Hello,
You are 100% correct in your guess of the magnetron is bad and is need of being replaced. You do have to verify that the mounting bracket is the same and preferrably of the same wattage that was installed or of a higher value if you are replacing it from another microwave that was discarded. The magnetron is usually built very well so most microwaves that are tossed are due to the control panel display and not the the magnetron tube assembly.
The best bet would be to purchase the same model # magnetron that was removed from the oven if you are doing it yourself.

Jan 03, 2009 | Microwave Ovens

1 Answer

Lights flash and crazy display



(If yours is not a Samsung, please reply back with your brand and model!)


Sadly, we hear of this over and over.

This is due to a defective or loose magnetron causing electrical interference and disruption in the control circuit board.

If your magnetron was recently replaced, it may have loose mounting nuts or bolts or maybe the wire mesh RF gasket was not installed or got pinched.

It may also need a new high-voltage diode and stirrer, and the cavity may be affected.

If you or someone you know decide to look into it, we have critical information on safety, disassembly and door switches at our site, and our link is at our listing here on FixYa.

If it's within the magnetron portion of the warranty (usually 5-9 years) but out of the original full warranty (usually 1 year), then your manufacturer will cover the part cost, but not the cost to visit you or the labor charge to do the work.

They may even send you a replacement magnetron.

You can order Samsung parts here. You can find your nearest Samsung-authorized service center here.

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

Apr 29, 2008 | Samsung SMH7174BC Microwave Oven

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