Microwave is frozen, weird number displays on front and when closed it starts heating when I don't even press start.

The sensor errors are probably just from opening the door and interrupting the sensor cook cycle.

By the way, you should always press "Stop" before opening the door of a running microwave. Otherwise, the door switches will prematurely fail.

I would first check the door switches and their mounts. See this help file.

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

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.



You can also download manuals, installations info, and parts lists here.

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

I guess your model number is GMV1540TW?

I think I answered this or a duplicate post already, but here goes:

The owner's manual covers that, but if for some reason you don't have yours, you can get it here.

To set child lock:

1. Press STOP/CLEAR.
2. Touch and hold START more than 4 seconds.
"LOCKED" will appear in the display window with two beeps.

To cancel child lock:

1. Touch and hold START more than 4 seconds.
"LOCKED" will disappear in the display window with two beeps.

Push the microwave door tightly closed. The computer will not start cooking until the door is closed for safety reasons. Some models of microwave will give a warning on the screen if the door is open.
2

Ensure you have programmed a heat setting, entered a cooking time and pressed the "Start" button on the microwave's keypad. Check that the microwave is not set to "Defrost" mode.
3

Unplug the microwave and wait for one minute. This measure will reset the microwave's internal computer if it has frozen or scrambled. Plug the microwave back in and try again.
4

Ensure the keypad lock mode is inactive. Most microwave ovens have a lockout feature that prevents children from starting the microwave while unsupervised. Lockout mode is usually deactivated by holding down the button that bears a padlock symbol

Hello

Push the microwave door tightly closed. The computer will not start cooking until the door is closed for safety reasons. Some models of microwave will give a warning on the screen if the door is open.


Ensure you have programmed a heat setting, entered a cooking time and pressed the "Start" button on the microwave's keypad. Check that the microwave is not set to "Defrost" mode.


Unplug the microwave and wait for one minute. This measure will reset the microwave's internal computer if it has frozen or scrambled. Plug the microwave back in and try again.


Ensure the keypad lock mode is inactive. Most microwave ovens have a lockout feature that prevents children from starting the microwave while unsupervised. Lockout mode is usually deactivated by holding down the button that bears a padlock symbol (like the "Start" button in the photograph).

Push the microwave door tightly closed. The computer will not start cooking until the door is closed for safety reasons. Some models of microwave will give a warning on the screen if the door is open.


Ensure you have programmed a heat setting, entered a cooking time and pressed the "Start" button on the microwave's keypad. Check that the microwave is not set to "Defrost" mode.


Unplug the microwave and wait for one minute. This measure will reset the microwave's internal computer if it has frozen or scrambled. Plug the microwave back in and try again.


Ensure the keypad lock mode is inactive. Most microwave ovens have a lockout feature that prevents children from starting the microwave while unsupervised. Lockout mode is usually deactivated by holding down the button that bears a padlock symbol

The owner's manual should tell you what that symbol means.

If for some reason you don't still have yours, you can download it here.

I would suspect a bad door switch or door switch mount.

You should see my text file on door switches for more information.

You can order LG parts from Encompass here or you can call them toll-free at 866-779-5835.

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

Sometimes the correct procedure for setting the clock is to press the CLOCK or TIME OF DAY button, then enter the time on the keyboard, then press the START button instead.

Otherwise, as long as you can enter a cooking time and your oven operates normally, then don't worry about it. On some models it is normal for the colon on the clock display to blink all the time.

Good luck.

The clock must be set before you can use the microwave. When you plug it in, it should read all zeros. Enter the time, and press "Clock Set." Time is in 12-hour format. There is no daylight saving time.

For basic microwave use:
1. Press "Power."
2. Press the keypad corresponding to the desired amount of power, e.g., "High," or "Defrost." (The numbers on the keypad have little words on them, like "Warm," "Med," and "High".)
3. Press "Time."
4. Enter the desired cooking time, e.g., "1-0-0" will be 1 minute; you could also do "6-0" for 60 seconds. You can do as little as 1 second, up to 99 hours 59 minutes. "1-0-0-0" would be 10 minutes. "2-0-1-2" would be 20 minutes 12 seconds.
5. Press "Start."

NEVER operate the microwave when it is empty. Put at least a glass of water in it. Never put a glass in it empty; make sure the glass has something in it, like water. Be careful when taking out a glass of water that's been heated; the water has been known, in rare instances, to "explode" and severely scald people.

It is okay to use the approved metal rack (it's coated with ceramic to prevent arcing) when using the microwave in microwave mode. Of course, the metal rack is also fine for use in the convection/combination mode.

"Defrost" cycles between microwave and nothing, microwave and nothing, microwave and nothing. You can hear the cycles. If defrost takes too long, try "Low." Try to avoid using "High," as it kills most nutrients in the food. Opt for "Medium" for slightly longer time; it'll be more evenly heated and healthier. Some things, like popcorn, require "high" power.

To stop the microwave in the middle of cooking, simply open the door. (There's no such thing as microwaves escaping the oven and bouncing around the kitchen and zapping you. I have a microwave tester, and the moment you open the door, all microwaves dissipate; the reading at the door is "Zero" once it's opened.) Or, press "Cancel." If you open the door, you may test the food, and if it needs further cooking, you may close the door and press "Start," and it will resume where it left off. If you're all done, just press "Cancel."

There is no way to disable the 5 beeps at the end of the cycle. If the baby is sleeping and you don't want to hear the beeps, simply open the door right before the beeps when the countdown is at zero. Pressing "Cancel" will give you one beep.

If you have the Combination feature, that cycles between microwave and convection heat, giving the best of both worlds (cooking inside with microwaves and outside with convection), for things such as a whole meats.

To use Combination:
1. Press "Combination."
2. Consult the chart on the microwave (below the keypad) and choose a number from 1 to 4, depending on what type of food you're preparing (i.e., lamb, pork, etc.).
3. Press "Time."
4. Enter the desired time, using the method described above.
5. Press "Start."

The Convection feature simply blows hot air across the food, at the temperature and duration that you set. It's a great way to toast slices of bread for the whole family at once, or bake a pizza.

To use the Convection feature:
1. Press "Convection."
2. Choose the temperature (the degrees are printed on the keypad, such as "350 degrees."
3. Press "Time."
4. Enter the length of cook time, using the method described above.
5. Press "Start."

Be sure to cover foods (with a paper towel or suitable plastic cover) that are prone to splattering. Don't let foods explode and get up into the motor. Clean the inside regularly with a soft sponge and mild detergent, NOT harsh or abrasive chemicals like Comet. Then rinse the soap off with a clean sponge.

Be sure to close the door firmly before cooking, but don't slam it. Slamming it will wear out the latching part, but being too gentle in closing the door may cause the safety switch to not engage, and the microwave won't work (it'll count down and the light will turn on but the motor won't run).

Note: the Convection feature uses more wattage than the microwave counterpart. The volts and amps are listed in the door jamb; multiply them together and you get total watts (although the actual amount will vary depending on your "power" settings).

it is the problem of the faulty heating element .the heating element needs to be replaced to solve this heating problem.

if electronic control, one of two things come to mind. 1)your toutch pad is defective.replace it. 2)you electronic board has a leaky component.not very likly though. believe it or not, ive seen it start before by itself then i noticed a large quantity of bugs inside the glass which i realised triggered the microwave 0ff.