Question about Whirlpool MH1160XS Convection/Microwave Oven

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Circuit Board Would it be less expensive to replace a circuit board on a microwave or buy a new microwave?

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  • rizzolee2077 Jan 24, 2009

    It's a Whirlpool over the range microwave, model number MH1160XS.

  • rizzolee2077 Jan 24, 2009

    The hood light on the microwave blew out. When I took it out the base was stuck in the socket. I did not know if the light was on or not so I took a voltage meter and tested the socket for power. There was no indication of power. So, I stuck in a needle nose plier to remove the light bulb base. Apparently, there was power... and there was a loud pop and spark. I killed power to the microwave and changed the bulb. Now, not only does the light not work but the vent fan does not work.. however, the clock and display works. Also, when the microwave door is open the light inside comes on and I tried to put a glass of water in to see if it works and it makes a loud humming noise while the turntable moves very slowly.

  • William Miller
    William Miller May 11, 2010

    We repair those, or a new one (# W10164590

    ) would run $105.76 here.

    Are you sure the board is bad?

    What specific problem are you having with the oven?

  • William Miller
    William Miller May 11, 2010

    regularly repair microwave control circuit boards for customers nationwide by mail
    for $39.95 postpaid in most cases in about a week with a one-year guarantee.

    The cost of a new board can vary widely, as can the cost of a replacement microwave.

    It all depends on the model number. What's yours?



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  • Whirlpool Master
  • 9,086 Answers

Okay, sure.

We see (and repair) this a lot. The problem is on the control panel, which we regularly repair nationwide by mail for $39.95 postpaid in about a week.

At our Web site, you can get details of our service, plus we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

This light failure often occurs when a bulb goes out and the filament shorts, or when the bulbs are removed or installed without first unplugging the oven from the power line. Either can cause such a failure on the controller.

Sometimes this will also affect the exhaust fan operation, too. The lights and fan can be inoperable or stuck on too.

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

Circuit Board - bbc620e.jpg

Posted on Jan 24, 2009


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1 Answer

If left plugged in, microwave fills timer screen with "7's" then scrolls "push start". Circuit board? Fix?

I would say that the number 7 button is either broken or stuck in. If still under warranty, take it back. Otherwise, contact the vendor of the microwave and ask them how much it would cost to fix it. Generally, it's cheaper to buy a new microwave than replace the circuit board, unless you can find second hand parts on eBay or a similar site.

Jul 14, 2015 | Microwave Ovens

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Microwave runs but will not heat(unit is approx. 5yrs old)

the problem may be with your thermostat check that ,and repair it

Jul 03, 2008 | Microwave Ovens

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What should i do?

How old is your microwave? If it is more than 5 years old and you are having problems with the circuit board, you can probably replace the microwave for less money than fixing your old one. Sorry, but I hope this helps you decide what to do.

May 09, 2015 | Microwave Ovens

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GE JEM25GY Spacemaker died. No lights and won't turn on. Power from recepticle is OK. Shall I just buy a new one. Probably had this one for at 15 years. Thanks

It may just be a blown fuse. At 15 years old it might be a good idea to consider a new one but replacing the fuse is not real expensive and fairly easy to do. Unplug your microwave and turn it around and remove the screws holding cover on and then remove the cover. Look for where the power cord goes into the back of the unit and follow the black wire from the cord to where it ends. It should stop an either a circuit board or a fuse holder. Make sure that you replace the fuse with the same amperage fuse as what you take out. You will find the amp rating stamped on one of the silver collars on each end of the fuse. Good luck!

Mar 07, 2015 | GE Microwave Ovens

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Heard a popping sound while it was running, then it quit, and showed no power. What's wrong and is it worth fixing?

A wire may have come loose causing a short and blowing a fuse. There should be a ceramic fuse on the power board. Also look for anything that crawls and has more than two legs.

Feb 15, 2015 | Microwave Ovens

1 Answer

How do you repair the surface light on microwave

You know how when you turn on a regular light bulb and it burns out with a bright flash? What happens is that when the filament burns out, it breaks and bounces back and hits the other electrical post and basically shorts out causing that bright flash. Sometimes, when the light bulb in the microwave burned out, it shorted out, and caused the circuit-board trace to burn up. (This is not just conjecture; I've seen it.) If that's the case, then you would have to replace the main control circuit board. Unfortunately, a rather expensive repair for no lights. (Although the circuit board trace can usually be repaired by direct-soldering a wire to replace the burned trace. Sears repairmen won't do this, but an independent electronic technician could do it.

Apr 23, 2014 | Kenmore 62622 Microwave Oven

1 Answer

Microwave is not heating

Microwaves contain high-voltage parts that can be deadly, even when unplugged, unless handled correctly. Unless you are a qualified expert, don't attempt to get into its inner workings.
Put 1 cup of water in the microwave and set it to heat on full power for 1 minute. Repeat the process with fresh water several times. If the water is not consistently warm, you've confirmed there's a problem.

If your microwave is failing to heat correctly, you may be on a previously programmed setting. Press the STOP/CANCEL button and start the heating process again, but use a higher power setting. This may correct the problem.

Otherwise, there may be an issue with the circuit board and its connections. If a qualified professional determines that the circuit board is defective, the most practical fix may be to buy a new microwave.

Microwaves installed above the range may be affected by steam from cooking. Condensation collecting on the circuitry can interrupt heating. Allow the circuitry to dry out by avoiding stovetop cooking for a few days. If you're still having the same problem, it could be a loose connection in the circuitry or a faulty door safety switch.

A buzzing or humming microwave that emits a faint burning smell could signal a damaged magnetron, high-voltage capacitor or diode. Replacement magnetrons are expensive, so if a service professional determines that's the problem, you may be better off buying a new microwave. Capacitor and diode parts cost much less, but remember, you'll be paying for the expertise to have them installed correctly and safely. It may still make more sense to buy a new microwave, especially if it's a simple countertop model.

For more troubleshooting steps and simple solutions, read Microwave not heating. I hope this helps!

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Sep 28, 2012 | Prestige Appliances Microwave Ovens

1 Answer

Electronically everything works EXCEPT the actual cooking. The time punches in and when I push start it just acts as a timer NOT a Microwave.

It's possible the magnetron tube, the microwave source, has gone bad, or one of the parts in its power supply has failed. There may be bad connections on the control circuit board, or the board itself is not working properly. One of the door interlock switches may be bad or is out of adjustment. The most frequent cause is the magnetron, particularly is you've had the oven for a while and it's gotten lots of use. Just like in a light bulb, wires in the magnetron can burn out, and one day the oven just quits heating.

Because of hazardous voltages present and the chance of microwave leakage if repairs aren't done correctly, you should leave servicing to a professional. A service shop can diagnose the problem and give an estimate. Or you can look at new ovens, which is often a more economical choice. The magnetron is the most expensive part to replace; between the part cost and labor charge, it's often not much more to buy a new oven. Sometimes a new oven can even cost less.

Hope this helps you decide what to do. Thanks for using Fixya!

Dec 12, 2010 | Jenn-Air JMV8000ss Microwave Oven

1 Answer

Replacing a circuit board on a microwave

It's very easy to do if you can get the circuit board. Take the two screws out of the plastic fan grill and pop it off. There should be one screw above the control panel. Take that off and the panel should pop off by slightly pushing up. Unhook all the wires and unscrew the board. Put the new board in and your done.

Jan 18, 2009 | Whirlpool GH4155XP Microwave Oven

2 Answers

Magic Chef MCO153UW

You absolutely need the magnetron cooling fan to be working, or the magnetron will be destroyed!

It is part # 3511800100 and you can order it for less than $20 here.

Far less than a magnetron.

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

Aug 28, 2008 | Microwave Ovens

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