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I've already replaced all three switches and the control board, what next?

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  • Whirlpool Master
  • 1,832 Answers

-What is the problem...? You need to specify what you need to fix.


Good luck


Mai

Posted on Nov 07, 2014

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Light bulb


follow this steps and fix it. God bless you

If your microwave light bulb is not working, perhaps it has blown. The first step is to replace the bulb and power on the microwave. If this does not correct the issue, the next step is to check the socket and wiring to verify if that is the problem.

  • Light bulb socket & main control boardIf your microwave light bulb is not working after the installation of a new bulb, check the light socket as well as the wiring to ensure they are properly operating. If these sources are functioning properly, the next step is to check for a faulty control board as a possible root cause to your microwave light bulb malfunction
  • Jul 29, 2013 | GE JES1384SF Microwave Oven

    1 Answer

    MY GE MICROWAVE WON'T HEAT


    check every step and fix it God bless youOK, get ready, this micrwave oven repair can take some time. This is where you must be able to read a wiring diagram and do some "live" checks on parts. First easy check is to make sure power is coming off your control board at the MW relay. Make sure of the wires and test here, if you have 120 volts at this point, you have ruled out a lot of parts that could be the problem. You have now ruled out any switch problems, control board problems, or a thermostat or 2.
    If you do not have power from that MW relay on the control board, you must trace the wiring back to see if the proper voltage is going through your switches, any thermostats, and arriving at your control board. Your wiring diagram on your sheet will show you where and what to test. Below is a general switch test troubleshooting guide.

    mwswitchtest.jpg

    mwswitchtest2.jpgIf the proper voltage is coming into your control board and you are not getting voltage at the MW relay, then you need to replace the control board. If voltage is interupted by a thermostat or switch from your testing to the control board, then replace that part.
    Now, testing from the MW relay on to your transformer, high voltage capacitor, magnetron, and diode.Do not do any voltage reading from the secondary side of the transformer on, this can be a deadly microwave oven repair if you do not follow directions. This can result in electrocution and the "blowing-up" of your voltmeter, only do OHM testing with the power off and the capacitor discharged. Someplace in this circuit, usually before the transformer, you will have another thermostat to test. It is usually mounted on the magnetron. Do a quick OHM test to see if it is open or closed.
    Now to test either the transformer, high voltage capicitor, magnetron, and diode, you must test each part separately. A good rule of thumb, if your capacitor is bad, change the diode also. Another note, if you are working on an OTR model and you have determined to be one of these "heating" circuit parts, you can not test these parts until you take the unit down. If you don't have the parts with you and you have to order them, order the magnetron, capacitor and diode and you will have a 90% chance of solving the problem. If it is an older microwave, order the thermostat also, most times you can return un-used, un-opened parts. Check with your parts supplier. This way you only have to take the unit down once.
    To test these parts, scroll down this page and you will see a chart with component tests. Follow the instructions to find which part(s) are defective in your microwave oven repair.
    Microwave Runs, Heats, but turntable does not move This is a fairly easy one. First, make sure the turntable coupler under the glass dish is not broken. Second, on the control board, find the turntable relay and test for voltage. Some turntable motors are 24 volts DC, so make sure your testing the correct voltage. If no voltage from the control board, then replace the control board. Otherwise head towards the turntable motor.
    On OTR models, you can get to the motor by un-screwing the bottom panel on the microwave. On countertop models, there will either be a knockout or screw on access panel. Check for voltage at the motor. If no voltage, check the wiring back towards the control. If voltage, then replace the turntable motor. The component list below also shows how to test a turntable motor.
    aa014b1d-e928-4197-bacf-82c758425dfb.gif

    Apr 02, 2013 | GE Microwave Ovens

    1 Answer

    Microwave won't heat for first minute - starts working normally after that.


    The magnetron may be defective. You can replace the magnetron, there is no other possibility.

    Jan 16, 2013 | KitchenAid KHMC1857WSS Microwave Oven

    1 Answer

    Replacing the keypad


    A full model number would be very helpful, but since you've not posted it, we have to just give generic advice.

    You can find links to helpful exploded view diagrams and part ordering help here.

    If on your model you have to order the separate membrane keypad, here is a handy guide with pictures showing you what's typically involved.

    If you can order the control panel frame with a keypad already installed, it's much simpler.

    In this second case, 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.

    Once the controller assembly is loose from the oven, you need to remove the keypad strip, then take your board out of the old frame and put it in the new one.

    40716d4.jpg

    Some connectors may have a lock.

    positivelock.jpg


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

    Sep 04, 2012 | Samsung Microwave Ovens

    1 Answer

    I have a Siemens HB86E560B microwave oven. The clock has gone dim. Any advice please?


    The clock is built into the microprocessor control board, the problem may be poor solder points or a part that has changed value, you will need a professional to make the determination.

    Mar 10, 2012 | Microwave Ovens

    1 Answer

    My light bulb has stopped working and will not work after I have replaced it with a new one


    It could be either a separate door switch for the light that's gotten crufty (sometimes just cleaning them makes them serviceable) of the microwave that needs to be reset. Just check for tripped circuit breakers, since you've already unplugged the thing to swap the bulb (I expect.) Then check your bulb's continuity, then check the socket and switch functions if things aren't sorted.

    Sep 10, 2011 | Whirlpool MH1141XM Microwave Oven

    2 Answers

    SE error on Samsung SMH9151B. Where so I find the assembly part to order?


    "SE" error means you have a shorted membrane keypad.

    The full model number from the tag on the oven should be one of these:

    SMH9151B/XAA (service manual)
    SMH9151B/XAC (service manual)
    SMH9151BE/XAA (service manual)

    I've included the service manual link for each one for your convenience. They'll help you with disassembly and in getting part numbers.

    You can order parts by entering part numbers or your full model number from the tag on the oven here.

    There are three ways you can fix this, with the last probably being the best:

    1. Replace the membrane keypad ("switch membrane"). The cheapest way but the hardest. 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. It's here.

    2. Replace the control panel frame assembly ("assy control panel"), which comes with a new keypad on it already. Pretty easy, not expensive.

    3. Replace the entire controller ("assy control box"). Very easy, and usually not much more than option 2.

    No matter which option you prefer, 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.

    34374fd.jpg

    Some connectors on the relays may have a lock:

    positivelock.jpg


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

    May 23, 2011 | Microwave Ovens

    1 Answer

    Does not heat up


    Does the problem "fix itself" or your service guy replacing parts and fixing it?

    Generally, the most common causes of a failure to heat are:

    - bad door switches or door switch mounts
    - loose connection at the magnetron
    - problem or loose connection on the control unit circuit board
    - bad magnetron or other high voltage part such as high-voltage rectifier diode

    Door switches are most often damaged by opening the door while it's cooking (instead of pressing Stop / Clear first) or food
    / grease debris in the switches.

    Oct 23, 2007 | GE JE1640 Microwave Oven

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