LG Microwave not working. Households cannot function without microwaves. They have made life a lot more convenient for a lot of people, especially those who live alone for example.
One way to know if your microwave isn’t working properly is if it’s not heating up things even after its usual cycle time.
But before we start pointing fingers at what may be causing the problem, there are just a few things you should do first like test the power supply and check out the outlet itself to see whether or not it’s still working properly.
Inspecting these two things will help identify whether or not your LG microwave isn’t getting enough power and whether or not it’s fully functional in that sense too.
LG Microwave not working
Using a microwave that isn’t functioning properly can be really frustrating. Whether it’s a simple fix or something more in-depth, we can help you repair any issues you are having with your LG Microwave.
Defective Breaker Panel
Microwaves should be on separate circuits and ideally at least 20 amp breakers. Verify that the breaker has not tripped at the breaker panel.
Compared to other breakers, a tripped breaker can appear out of place. There may also be some red showing on the breakers that indicates they are tripped.
Flip the tripped breaker off, wait a few minutes and then flip it back over to on. If this continues to happen, contact an electrician as it may be due to a wiring problem or an issue with the actual breaker.
Power Cord issue
Ensure that the power cord is in good working condition by visually inspecting it. Be on the lookout for rotten sockets, frayed wires, or exposed copper wiring which may overheat and present a fire risk. Replace the cord immediately if any of these problems occur.
Faulty Main Control Board
Many people misdiagnose the main control board in a microwave as being defective, but that is rarely the case. Explosions from microwaves happen when another part fails first, creating an arcing fault that can result in a fire. It’s very important that you carefully check all of its more commonly broken parts before deciding to purchase a new microwave oven.
(Caution: The microwave can store thousands of volts of electricity even after it has been switched off, so be extremely careful. Either unplug your microwave when working on it or use one of these )
Line Fuse blows
If too much current passes through the microwave circuitry, the line fuse will blow. If this happens, your microwave will not start operating. To determine if the line fuse is at fault, use a multimeter to test it for continuity.
If the fuse is found to be faulty (faulty fuses don’t have continuity), replace it with a new one. Moreover, you should determine and resolve the cause of the fuse blowing.
If you fail to address and solve the underlying issue that made this happen a recurring problem will simply develop once more in due course.
Thermo Protector faults
The thermostat acts as a temperature control device. When the microwave begins to overheat, the interlock trips the circuit, cutting power to the microwave.
Using a multimeter, test the thermostat for continuity to determine if this mechanism is malfunctioning. If there is no continuity and it cannot be reset, replace it,
The Thermal Fuse has blown
If the microwave has a built-in thermal fuse, locate it on the bottom of this appliance. If it does not, or if you are unsure whether it does, confirm that there is a thermal fuse installed on your microwave by referring to your owner’s manual.
To check for the proper functioning of the thermal fuse, plug an alligator clip lead from a multimeter into each terminal. The reading measured across the terminals should be about 5 ohms for at least 2 seconds when power is applied and then removed.
If the reading does not meet these specifications, replace the fuse as needed before operating the oven again.
If testing indicates that no continuity exists through the thermal fuse when power is applied and removed, it must be replaced. Replacement of this part may require a qualified technician only; do not attempt replacement yourself.