Question about Whirlpool Microwave Ovens

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Stops cooking at end of time but still keeps running

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  • Whirlpool Master
  • 17,129 Answers

Possible that the relay is stuck or that the processor does not cut off the relay drive or the relay drive is faulty. You need to remove the control panel and reset the board , clean the board , check for faulty relay , drive transistor to the relay or dry joints in the processsor. Also check for moisture or dirt accumulation. Clean and reset.

Posted on Jan 22, 2013

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6ya6ya
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Posted on Jan 02, 2017

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Why does my microwave keep running/heating until I open the door? what can i do about it?


Sounds like a problem with the control panel. Further diagnostic testing would be required, however, as there can be other causes.

May 10, 2014 | Oster OGB61101 Microwave Oven

2 Answers

We have just purchased a Kenwood microwave/combination oven and are concerned there may be a problem. When the food has finished cooking and the microwave beeps it seems there is a fan or something still...


In most modern combination microwave ovens, if not all, there is a fan that comes on after use to cool the magnetron and cavity down. This is quite normal but if you still have doubts, contact Kenwood's web site and send them a question.
Hope this halps to put your mind at rest.

Nov 27, 2010 | Microwave Ovens

1 Answer

Occassionally (about 5% of the time) the microwave continues to cook and buzz after the timer has run out and the fan stops running.


sounds like the program bord is faulty,, when your finished cooking leave the door open a little that will save the microwave from trying to cook nothing?

Aug 28, 2010 | Whirlpool GT4175S Microwave Oven

1 Answer

Model R-1460, when I shut the door it runs but doesn't heat up. What needs to be done to fix it?


Do you mean that when you close the door, the fan comes on? If so, it sounds like a bad door switch. Probably the secondary interlock switch.
This failure is caused by opening the door when the unit is in cook mode. On ALL microwaves, not just one or two brands.......
Be sure to push the stop button before opening the door to add or stir... Or wait for the cook cycle to end. (This is why microwaves have a two step function on the stop/clear button. Hit stop once to stop cook mode and twice to reset timer).
You should use an ohm meter to check all 3 switches. The switch can be either stuck 'closed' or physically closed but not 'making' electrically.

Sep 13, 2009 | Sharp Microwave Ovens

1 Answer

MW8119SB cooks when door is closed regardless of settings


Clear the cook cycle when you remove the food. Some microwaves pick up where they left off, so you don't have to keep pressing buttons.

Aug 07, 2009 | Emerson MW8778 Microwave Oven

1 Answer

Microwave still continues after cooking time is ended


It is the fan. Im guessing it only happens on combination cook and not when you are only using the microwave setting. It happens because the oven is hot and it helps to cool it quicker. It is normal. The microwaves are not working and neither is the oven-just the fan.

Mar 31, 2009 | Oster 0.7 Cu. Ft. Compact Microwave

1 Answer

Our Microwave keeps running unless we give it a whack!


Hi firstly to see if it is producing energy, buy some 5mm light emitting diodes from an electronics store. cut off the leads close to the plastic body.
place in microwave and put on cook for max 10 secs, if the led's light up you have microwave energy, shut off the oven as soon as they glow otherwise you end up with a mess.
If you have energy then your problem is most probably the door interlock micro switches which after time do not operate properly. let me know the results and we can go further.

Feb 23, 2009 | Danby DMW1153 Microwave Oven

1 Answer

Was cooking in microwave and it totally shut off. Light went out and stopped. After a while "PF" appeared on the panel. What caused this to stop and what do I do to get it back working? My...


If it goes dead for a while during or after cooking then comes back on, the magnetron is probably overheating and causing the magnetron thermostat to open.

Then when it cools, it closes the circuit and allows power through again.

First of all, be sure the internal cooling fan is running. That's critical to protect the magnetron by keeping it cool.

You can test this by running the microwave with a cup of water inside. First, cook for about 2 minutes on the lowest power setting and see if it makes it to the end. Then cook on high for 2 minutes and see if it makes it to the end.

If the defrost test works, but the full power test does not, then the magnetron is overheating.

If you or someone you know wants to look into this, we have critical safety, disassembly, and troubleshooting info at our site, and our link is at our listing here on FixYa.

You can usually 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.

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

Jul 22, 2008 | GE Microwave Ovens

2 Answers

Panasonic NN-S262SF stops cooking after 3 seconds


inverter problem the transistor 1M30D is shorted

May 28, 2008 | Panasonic NN-S262SF Microwave Oven

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