LG microwave troubleshooting

LG brands

LG MAB series microwave troubleshooting

ProblemCauseSolution
OVEN WILL NOT START AT ALLElectrical cord for oven is not plugged inPlug into the outlet
Door is open.Close the door open and try again.
Wrong operation is set.
Check operation instructions.
ARCING OR SPARKINGMaterials to be avoided in microwave oven are
used
Use microwave-safe cookware only
The oven is operated when emptyDo not operate with oven empty
Food refuse remains in the cavity or inside the
cavity is uncleaned.
Clean cavity with wet towel
UNEVEN COOKING OR POOR DEFROSTING Materials to be avoided in microwave oven are
used
Use microwave-safe cookware only
Cooking time/Cooking power level is not
suitable
Use correct time/Cooking power level.
Food is not turned or stirred.Turn or stir food.
OVERCOOKED FOODSCooking time/Cooking power level is not
suitable.
Use correct time/cooking power level.
UNDERCOOKED FOODSMaterials to be avoided in microwave oven are
used
Use microwave-safe cookware only
Food is not defrosted completelyCompletely defrost food
Oven ventilation ports are restrictedCheck to see that oven ventilation ports are not
restricted
Cooking time/Cooking power level is not
suitable
Use correct time/Cooking power level.

LG LCRT series microwave troubleshooting

QuestionAnswer
Why is the oven light not on during
cooking?
There may be several reasons why the oven light is not on.
Have you:
ţ Set a cooking time?
ţ Touched START?
Why does steam come out of the air
exhaust vent?
Steam is normally produced during cooking. The microwave oven
has been designed to vent this steam.
Does microwave energy pass through the
viewing screen in the door?
No. The metal screen bounces the energy back to the oven cavity.
The holes (or ports) allow only light to pass through. They do not
let microwave energy pass through.
Can my microwave oven be damaged if
food is cooked for too long?
Like any other cooking appliance, it is possible to overcook food
to the point that the food creates smoke and even possibly fire,
and damage to the inside of the oven. It is always best to be near
the oven while you are cooking.
Why do I see light reflection around the
outer case?
This light is from the oven light which is located between the
oven cavity and the outer wall of the oven.
What are the various sounds I hear when
the microwave oven is operating?
The clicking sound is caused by a mechanical switch turning the
microwave oven’s magnetron ON and OFF.
The heavy hum and clunk is from the change in power the
magnetron draws as it is turned ON and OFF by a mechanical
switch.The change in blower speed is from the change in line
voltage caused by the magnetron being turned ON and OFF.
What is wrong when baked foods have a
hard, dry, brown spot?
A hard, dry, brown spot indicates overcooking. Shorten the cooking
or reheating time.
Why do eggs sometimes pop?When baking, frying, or poaching eggs, the yolk may pop due to
steam build-up inside the yolk membrane. To prevent this,
simply pierce the yolk with a wooden toothpick before cooking.
CAUTION: Never microwave eggs in the shell.
Is it possible to pop popcorn in a
microwave oven?
Yes, if using one of the two methods described below:
(1) microwave-popping devices designed specifically for microwave
cooking
(2) prepackaged commercial microwave popcorn that is made
for specific times and power output needed
Why do baked potatoes sometimes
burn during cooking?
If the cooking time is too long, fire could result. At the end of the
recommended cooking time, potatoes should be slightly firm.
CAUTION: Do not overcook.
Why is a standing time recommended
after microwave cooking time is over?
Standing time allows foods to continue cooking evenly for a few
minutes after the actual microwave oven cooking cycle. The
amount of standing time depends upon the density of the foods.
Why is additional time required for
cooking food stored in the refrigerator?
As in conventional cooking, the initial temperature of food affects
total cooking time. You need more time to cook food taken out of a
refrigerator than for food at room temperature.

LG LMV series microwave troubleshooting

PROBLEMPOSSIBLE CAUSES
If nothing on the oven operates • check for a blown circuit fuse or a tripped main circuit breaker.
• check if oven is properly connected to the electric circuit in house.
• check that controls are set properly.
If the oven interior light does not work• the light bulb is loose or defective.
If oven takes longer than normal to cook
or cooks too rapidly
• be sure the Power Level is programmed properly
If food cooks unevenly• be sure food is evenly shaped.
• be sure food is completely defrosted before cooking.
• check placement of aluminum foil strips used to prevent overcooking.
If food is undercooked • check recipe to be sure all directions (amount, time, and power levels)
were correctly followed.
• be sure microwave oven is on a separate circuit.
• be sure food is completely defrosted before cooking.
If food is overcooked • check recipe to be sure all directions (amount, power level, time, size of
dish) were followed.
If the display shows a time counting
down but the oven is not cooking
• check that door is firmly closed.
• check that timer was not started instead of a cooking function.
Vent fan starts automatically• If the temperature gets too hot around the microwave oven, the fan in the
vent hood will automatically turn on at the LEVEL 4 setting to cool the
oven. It may stay on up to an hour to cool the oven.

LG MA series microwave troubleshooting

QuestionsAnswers
What’s wrong when the oven light will not glow?There may be several reasons why the oven light will not glow.
Light bulb has blown
Relay has failed
Does microwave energy pass through the viewing screen in the door?No. The holes, or ports, are made to allow light to pass; they do not let
microwave energy through.
Why does the beep tone sound when a button on the Control Panel is
touched?
The beep tone sounds to assure that the setting is being properly entered.
Will the microwave function be damaged if it operates empty?Yes Never run it empty
Why do eggs sometimes pop?When baking, frying, or poaching eggs, the yolk may pop due to steam
build up inside the yolk membrane. To prevent this, simply pierce the yolk
before cooking. Never microwave eggs in the shell.
Why is standing time recommended after microwave cooking is over?After microwave cooking is finished, food keeps on cooking during
standing time. This standing time finishes cooking evenly throughout the
food. The amount of standing time depends on the density of the food.
After microwave cooking is finished, food keeps on cooking during
standing time. This standing time finishes cooking evenly throughout the
food. The amount of standing time depends on the density of the food.
Check your cooking guide again to make sure you’ve followed directions
correctly, and to see what might cause variations in cooking time.
Cooking guide times and heat settings are suggestions, chosen to help
prevent overcooking, the most common problem in getting used to a this
oven.