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G2 Whirlpool Microwave display turns off showing ''Mains Low''

I removed the display panel and checked voltages up to the Display PCB and Power PCB. While checking voltages on large wiring harness on the Power PCB the display kicked on and everything started working again. I reassembled, mounted and used the microwave for a week, and while I was cooking on the stove it happened again. Display showing ''Mains Low'' now for 4-5 days. My thought is that moisture from cooking on the stove is either causing bad connection on the Power PCB or I'm just totally lost.

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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MicrowaveSvc
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SOURCE: 1994 Whirlpool Microwave Mod MH7115XBQ-2

You can find exploded view diagrams and order parts here: http://tinyurl.com/gv383 The most likely causes are: diagram 5, ref. 5 fuse diagram 7, ref. 2 thermistor diagram 2, ref. 5 control board If it's a problem with the control board, we repair them nationwide for $32.50. We also have important safety and disassembly information we recommend: http://tinyurl.com/yzjozk

Posted on Feb 04, 2007

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SOURCE: Microwave Fan won't shut off, no display

Depending on which brand you have I would think that the Thermal switch on top of the magnetron or one of the door switches has probably given up the ghost. However, if the display does not come on you probably have a micro or Psu fault on the display panel. Not to be attempted if you are not familiar with microwaves or electronics. Please unplug before opening. Good Luck, JUS004

Posted on Jan 05, 2008

MicrowaveSvc
  • 9047 Answers

SOURCE: GE Above the Cooktop Oven Microwave JVM1533 Turn table does not move

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 a shorted diode)

In this case, I would suspect the primary interlock door switch.

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

You can usually find helpful exploded view diagrams and order parts by entering your full model number here: http://tinyurl.com/gv383

There should also be a a very helpful "mini-manual" hidden inside the unit behind the control panel. It's very helpful when troubleshooting.

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

Posted on Jan 12, 2008

MicrowaveSvc
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SOURCE: Whirlpool Microwave Model MH3184XP will not power up after power failure

The first thing to try is a "hard reset". Unplug it from the power line for a few minutes, plug it back in, set the clock, then try again. Let us know if the hard reset doesn't fix it.

If not, then you may have a problem is on the control panel, which we repair nationwide for $39.95 postpaid.

We have full details, plus *critical* safety, disassembly, and troubleshooting info at our site. You'll find a link to our site in our
listing here on FixYa: http://tinyurl.com/yzjozk

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

Posted on Feb 13, 2008

MicrowaveSvc
  • 9047 Answers

SOURCE: Microwave Oven Does Not Start Cooking

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.

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.

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:.

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.

If you don't find yours, or if you want to look at it without disassembling the oven, you can download it here.

If yours is not shown at the parts site or manual site linked above, Please reply back with your brand and model number so we can help you.

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

If you think the problem is on the control panel, we repair these nationwide by mail for $39.95 postpaid in most cases in about a week or so.

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

Posted on Dec 25, 2008

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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 or so.

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.

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

William E. Miller, AS-EET
prototech@usa.net
http://www.microwavedisplay.com
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