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Jeffrey Spencer Posted on Feb 12, 2014

Fan failure /Intermittent heating

We got a note on the keypad to replace the filter. The fan stopped turning on. We replaced the filter and still didn't work. After that, the M/W turns on, heats for two minutes and then stops heating. The unit still runs and the turntable spins. Is this due to the fan not clearing the steam from the unit?

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Phillip Cushnie

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  • Contributor 6 Answers
  • Posted on Feb 12, 2014
Phillip Cushnie
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Quite likely your microwave is trying to prevent it self from self destruct, because if the fan is not keeping the electronics components cool enough while its running the high limit thermo will disconnect power from the heating circuit, if the fan is not working it should be replaced , that's a techs job.

I’m happy to assist further over the phone at https://www.6ya.com/expert/phillip_77d32603f8052503

5 Related Answers

Anonymous

  • 17 Answers
  • Posted on May 14, 2008

SOURCE: Microwave turns on, but no heat or turntable movement

The problem is that the magnatron is not getting power. Chance is that if could be a bolwn fuse inside the unit. If the fuse don't fix it then that leaves the charging diode, capacitor or the magnatron, or high voltage xformer of which without technical epertize I would not recomend attempting to replace. good luck

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MicrowaveSvc

William Miller

  • 9179 Answers
  • Posted on Oct 03, 2008

SOURCE: Over the range Goldstar microwave not working????

(If you need more help than this, please reply back with your model number)

It's probably a bad door switch or door switch mount.

Even though a door switch clicks, it may still be bad inside. Its continuity must be checked.

Door switch or mount trouble can be 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 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 you only need a switch, you can order one from us 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.

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

MicrowaveSvc

William Miller

  • 9179 Answers
  • Posted on Mar 02, 2009

SOURCE: GE XL 1800 microwave light and fan operate but no heat

With the symptoms you have, I would most strongly suspect a shorted high voltage rectifier diode or a bad magnetron, or a loose and possibly corroded connection on the magnetron's terminal.

The diode is a fairly cheap fix, and your magnetron is still under the part warranty, but you would have to pay labor.

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

There should be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, testing, and locating components.

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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.

Here are some links you or someone you know can use for test help, but read their safety warnings first:

http://www.gallawa.com/microtech/diode.html
(if it's not shorted or burned, it's probably okay)


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

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

If it's within the mag warranty, G.E. should send you the magnetron to do it yourself. Call them at 888-239-6832 with your model, serial, and manufacturing date.


If nothing else, you can save about $50-75 if you remove it from the wall and take it to a GE-authorized servicer.

You can find a GE-authorized servicer by calling GE Appliance Service at 1-800-848-7620 or here.


Accessing some components for testing and possible replacement will require you 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.

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

ginko

Ginko

  • 19396 Answers
  • Posted on May 21, 2009

SOURCE: Whirlpool MH1140XM: has power, but no heat, turntable not spin.

Test the high voltage capacitor, the rectifier diode.or the magnetron.

The diode and capacitors can br tested. The capacitor must be allowed discharge before testing, or you risk to get electrocuted, even if power is off. Capacitors can get discharged by shorting their two contacts.
Replace the magnetron if the checks and all of the high voltage component tests are good, but the unit still does not heat.

All locations, and description of this parts can be located using the diagram here: Counter top.

Parts must be tested to find out what is wrong.

Remember that microwaves are potentially dangerous devices if not repaired properly, the job must be done by a competent person.
A microwave energy leakage test must always be performed when the oven is serviced for any reason.

Regarding parts, contact the seller here to purchase parts.

freetek

Steve Allison

  • 5569 Answers
  • Posted on Aug 18, 2009

SOURCE: Whirlpool MH1150XMB-0 runs but does not heat food

If the housing of the unit isn't too difficult to remove (normally 3-5 Phillips screws around the rear edge), with the unit unplugged of course, check for a user replaceable fuse inside. The magnetron is separately fused and fuses can fail due to metal fatigue. It will be high amperage; 10-20 amperes and many hardware stores will have them. BTW, there is no residual radiation from a magnetron that isn't operating.

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Direct spraying of cleaners on the keypad and steam from the cooktop can short the keypad.

Luckily, it dried out. Sometimes it doesn't, and the keypad has to be replaced.

I always recommend that you spray non-ammonia cleaner on a soft cloth (not a paper towel which can scratch) and gently wipe the keypad.

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When I say internal cooling fan, I do not mean the hood vent exhaust fan which you can turn on and off manually.

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There should 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.

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.

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If needed, GE may send you a replacement magnetron. GE Customer Service is here.

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