Lg micro appears to be working, but will not heat

Check the supply of HT transformer if ok then check HT diode by replacement still not ok then replace magnatron.

it may be a micro switch which is activated by door,or the filament of the magnetron.

Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101 ,.,./ll
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Micro wave as the name suggests produces heat when the micro waves aimed at an object causes the water molecules inside the object to vibrate hence producing heat.The gadget responsible is the magnetron. If your magnetron is not receiving ht voltage or receiving but faulty, then your micro wave wont work please take precaution when opening micro wave due to high voltage caps that remain charged sometimes even when it is off.check the high voltage fuse/ diode and capacitor if they are fine and the step up trans former o.k then the only option is to replace the magnetron

Hi,

Here is a tip that will help you to figure out what is wrong with your Microwave Oven....

Basic Microwave Oven Troubleshooting Tips

heatman101

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Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Basic Microwave Oven TroubleshootingTips

heatman101';';';l;

Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101

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Classic symptoms for failed door interlock safety switches, though it could be other trouble.

Remove the cover and check the operation of the little micro switches that operate when you close the door.

DONT TOUCH THE SILVER CAN - LETHAL.

If you regularly open the door while cooking, the contacts in these little switches become burned. When burned badly enough, they cannot make contact. When they cannot make contact, the mocrowave doesnt know the door is closed and will not turn on the magnatron resulting in no heat.

If you need more help, let me know.

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Hello bbmasonjim,
If your micro turns on ( meaning everything seems to be working from the control panel) and you aren't getting microwave energy to heat food..you may have any number of damaged or defective components : Magnetron Tube, Filament Power Supply or HV Capacitor.. None of which are something the untrained person should mess with. Even unplugged, there is High Voltage potential inside the electronics compartment. If it is less than a year old, it may still be under warranty.. otherwise.. the cost to repair would probably be higher than the cost to replace..

Regards,
Rick

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