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Have you checked to make sure that you have power coming in to the unit? Check the fuse to the outlet that the unit is connected to before we go any further.
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https://www.youtube.com/watch?v=IN0BqiVX5ds
May 21, 2013 - Uploaded by GuruBrew
How to Fix a Microwave Oven - Simple Fuse Replacement. GuruBrew .... I'm hoping it's just a blown fuse ...
The only thing inside a microwave oven that draws enough current to blow a fuse is the magnetron that generates the microwaves to provide the cooking power. Based on the age of the unit (approx 15 years) it is most likely best to just replace it as repairs at that level are not cost effective. Newer units cook better and faster using less power these days.
Check internal fuse. If it's ok, one of the internal door switches, the high voltage circuitry, or the circuit board may have a problem. Diagnostics and repair might be quite complicates so better you take it to a repair service. You have some interesting Youtube video tutorials to repair a microwave
You may have to remove the cover on the microwave to find a fuse. It may not be either in a fuse holder or soldered into a the circuit board. be sure it is not plug up when you check.
if you find it be sure and replace with the fuse with same current rating.
the problem your are experiencing with your microwave oven is a failed interlock switch. Be careful when closing your microwave door. Slamming the door too hard is one of the main reasons that the interlock switch is damaged.
Slamming the microwave door shut can easily blow the microwave fuse, but they can also blow due to problems with the interlock switches. A microwave oven will not function until the fuse is replaced.
Instruction on how to replace fuse on microwave.
1. Unplug the microwave from the electrical outlet to prevent electrocution. Place the microwave in a well-lit area to be able to locate the fuse.
2. Use a screwdriver to remove the outer cabinet of the microwave, and follow the power cord to the fuse. The fuse is located 2 to 3 inches within the microwave and is attached to the power board.
3. Observe the fuse to determine if it is blown. Blown glass fuses will produce burn marks on nearby surfaces, or the internal fuse wire will be black and melted, while ceramic fuses show no outward appearance of being blown.
4. Determine if a ceramic fuse is blown by testing it with an ohmmeter. If the ohmmeter reads zero ohms, your fuse is not blown. Other readings on the ohmmeter show that your fuse is blown.
5. Replace the blown fuse by popping it out of its holder, and snapping a new fuse in its place. Tighten the fuse clips by squeezing them together with your fingers.
6. Replace the outer cabinet of the microwave, and plug the microwave back into the electrical outlet. Test the microwave to see if it's working properly.
If the microwave plug has fuse,check if it has not burnt.if these are okay there is need to take the last step.
things needed 1.Screwdriver 2.Ohmmeter 3.New fuse
1. Unplug the microwave from the electrical outlet to prevent electrocution. Place the microwave in a well-lit area to be able to locate the fuse.
2. Use a screwdriver to remove the outer cabinet of the microwave, and follow the power cord to the fuse. The fuse is located 2 to 3 inches within the microwave and is attached to the power board.
3. Observe the fuse to determine if it is blown. Blown glass fuses will produce burn marks on nearby surfaces, or the internal fuse wire will be black and melted, while ceramic fuses show no outward appearance of being blown.
4. Determine if a ceramic fuse is blown by testing it with an ohmmeter. If the ohmmeter reads zero ohms, your fuse is not blown. Other readings on the ohmmeter show that your fuse is blown. 5. Replace the blown fuse by popping it out of its holder, and snapping a new fuse in its place. Tighten the fuse clips by squeezing them together with your fingers.
6. Replace the outer cabinet of the microwave, and plug the microwave back into the electrical outlet. Test the microwave to see if it's working properly.
Replace the magnetron, safety fuse and diode as a set and check the door interlock switches. That should get it working for another year or so. Don't forget microwave mains fuses are special sand filled and semisurge type.
HI, there is an in line fuse located on the Ac power cord near the power supply inside the microwave. Check to see if the fuse is blown. replace the fuse if needed. Now, if the fuse is in good condition, this will confirm power board failure. you will need to replace the failed component or replace the entire power assembly in this case.
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