Question about LG LMVM1945 Microwave Oven

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Microwave Does Not Heat. Timer Works.......No Heat Display shows F-9 LG Microwave Oven/ Household Model LMVM 19455 SB Mfg. 2003

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

If it additionally does not spin and no light, then check also the door switch.

The diode and capacitors can br tested. The capacitor must be alloweddischarge before testing, or you risk to get electrocuted, even ifpower is off. Capacitors can get discharged by shorting their twocontacts.
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. (here in UK).

Posted on Apr 27, 2009

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Hello Bob,
Here is a link to the service manual for your micro.. you should find everything you need to know about testing it and disassembling it as well.. Hope this helps you..

http://136.166.4.200/contents/Microwave/LMVM1945xx/LMVM1945_Service_Manual.pdf

Hope this helps you.. if it does, please rank this response accordingly..
Good Luck

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