Question about Whirlpool MH1140XM Microwave Oven

2 Answers

Complete functioning control panel but nothing works.

Manufacturer: Whirlpool Model no: MH1140XMB-1 The other day, I went to replace the range light and ended up breaking the screw connector from the bulb (the installer glued the bulb in place.) so I flipped the relay for the microwave, used my pliers to remove the rest of the bulb, (didn't have a replacement bulb so I just screwed the cover back on.) and then flipped the relay back on. The control panel came up like it had lost power, so I pressed the clock button and re-entered the time. My wife then tried using the oven, and it let her enter the cooktime, and even hit start. At which point the oven should come on, nothing happens, but the timer starts counting down like it's cooking. Upon investigating other functions, it also appears that the vent fan isn't working, and upon checking the voltage to the empty bulb with my multimeter, it was 4VAC, no matter how the switch was set on the control panel. Any tips would be much appreciated.

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William Miller
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This is a problem with the control panel assembly, which we repair nationwide for $32.50 postpaid. Sometimes the bulbs short when they fail, and that damages the control board. This also can happen when bulbs are removed or installed without first unlugging the oven or turning off the breaker. For critical safety & disassembly info and other details of our service, see http://tinyurl.com/yzjozk

Posted on Jan 16, 2007

  • DG Shamburger
    DG Shamburger May 04, 2014

    You said it just like it happened to me; the bulb broke loose and their was a wad of hot glue there. You in the world turns off the juice to change a light bulb, not me. I guess I will replace the circuit board.

  • DG Shamburger
    DG Shamburger May 04, 2014

    Who in the world. Sorry

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This solution does not indicate how to get a control panel repaired nationwide etc.??

Posted on Jan 17, 2008

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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.

If you don't find your mini-manual, or if you want to look at it before removing the controller, you can download it here (just enter your model number).

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Whirlpool MH1140XMB-2 mic won't start
This is usually caused by either a bad door switch or a loose door switch mount, which are pretty simple problems to fix.

Even though a door switch clicks, it may still be bad inside.

Door switch or mount trouble is usually caused by slamming the door or by opening the door while it's cooking without hitting the Stop pad first.

There are plastic mounts inside the microwave which hold the door switches and onto which the door latches lock when you close the door.

The screws on these mounts may be loose. If they get too loose, the switches will not be activated properly.

Sometimes it's a broken tab on the switch holder, allowing the switch to rotate just out of position. This tab can be hard to see, since it is under the bottom edge of the switch.

If the switch mount is broken, it's usually more economical and safer to add a dab or two of hot glue to the mount to secure the switch. Let it cool for about 30 minutes before using.

One test that sometimes helps is to gently lift up (and/or push down) on the door or handle as you try to start it. If it works or tries to work, then it's a door switch mount or door alignment issue.

You can 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.

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Or you can view and download it here.

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.

If you only need a switch, you can order a universal type here for $5 postpaid.

If you've recently had trouble with your cooktop lights, one may have shorted, causing a problem on your control circuit board, which we regularly repair for $39.95 in about a week or so with a one-year guarantee.

 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

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

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