Question about LG Microwave Ovens

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My LG Inverter Microwave LMC1575ST is tripping after 20 seconds with error code F-17. It can be restarted immediately but again trips after 20 seconds. Heating function is working. It is one year old.

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  • LG Master
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Ask Google what the error code means

Posted on Apr 02, 2019

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE:

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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: PANASONIC INVERTER MICROWAVE, 1300 WATTS

  1. Same exact problem
  2. I've noted 3 different ones with the same problem
  3. Panasonic has produced a lemon, north fixing

Posted on Apr 11, 2008

MicrowaveSvc
  • 9173 Answers

SOURCE: Panasonic NN- A712 combination Microwave 1000w - Switches off after 20 seconds

The 22 seconds is the giveaway.

In most cases, this is a problem with the inverter or a bad magnetron.

Due to the lethal voltages used and produced, I do not recommend that an inexperienced person work on these.

I would recommend that you contact your nearest Panasonic-authorized servicer.

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

Posted on Jul 19, 2008

MicrowaveSvc
  • 9173 Answers

SOURCE: Will run for about 18 seconds,then gives an F7 error code

>No, the service guy did none of the things you suggested.

Just as I suspected...

The "element" as it is so inaptly misnamed in the case of this warranty document, is actually the "magnetron", which should normally have an extended warranty beyond the normal 1-year (I assume) parts and labor warranty anyway.

The magnetron may be the culprit here, but a thorough check of the points on my previously posted list is in order to determine the actual cause of the problem.

Since your husband is an engineer, I would suggest that he invite a colleague over to help and to provide some backup for any heavy lifting if it should need to be removed from the wall.

Safety first after all!

You can download Kitchenaid Whirlpool owner's manuals and installation instructions here in case it needs to be taken down during troubleshooting.

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.

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

You can find helpful exploded view diagrams and order parts by entering your full model number here.

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

Posted on Dec 15, 2008

MicrowaveSvc
  • 9173 Answers

SOURCE: panasonic nn-s255 wont turn on

See if this describes what's happening:

  • Put in time, push start and unit runs for 2 seconds, relay clicks, unit goes off. Cook time on display goes off and clock time comes back. Bad upper interlock switch and charred connector
If so, see http://www.microwavedisplay.com/safety.txt , http://www.microwavedisplay.com/disassembly.txt and http://www.microwavedisplay.com/doorsw.txt

Otherwise, if the digital programmer circuit / controller does not get a feedback signal from the inverter for a period of 3 seconds, the controller will stop the cook cycle.

It may be a loose connection in the wiring between the inverter, magnetron, and/or control board, or maybe one of those components has failed.


Due to the lethal voltages used and produced in inverters, I do not recommend that an inexperienced person work on these.

You can find an authorized Panasonic servicer here.

In Canada, you can find an authorized Panasonic servicer here.

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

NOTE: The FixYa system is not currently notifying me when folks reply to my posts, so please contact me directly for more help.

William E. Miller
prototech@usa.net
http://www.microwavedisplay.com

Posted on Sep 12, 2009

  • 72 Answers

SOURCE: Panasonic NNH965BF microwave starts but immediately shuts off

your mag has gone bad and possible that the inverter board as well, not really worth the hassel

Posted on Feb 06, 2010

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