How to Fix a Microwave Oven

One of the most popular kitchen appliances is the microwave. This is due to the fact that even a 2015 small microwave oven do more than just reheat and defrost your food. It can also cook all types of dishes, as the newest ovens, use more than just microwaves. They also use complementary cooking technologies such as convection cooking. If your beloved microwave has broken and you want to fix it to be able to benefit from using it once again, read the following lines. Here you will learn how to fix it depending on the type of problem that the appliance has.

How to fix it if the microwave won’t run

If the microwave won’t run at all, you have to unplug and check the voltage at the outlet. Inspect the cord for burn marks or damage. All of the microwave’s safety devices are located inside of it. To open the outside shell of the unit, you have to unscrew the screws located underneath it and on its back because they hold the shell. When you are done unscrewing them, simply slide the shell off.

The first thing that you have to check is if the fuse is blown. Remove it with a set of fuse pullers and place it on a paper towel. With the VOM, set the fuse to RX1 and place a probe on each end of the fuse. If the reading is zero, this isn’t your problem. If it shows anything else besides zero, replace the fuse with an identical one.

After you check and find that the fuse isn’t the problem, check the door switch. Locate the door switches and remove the leads. Probe their terminals with the VOM set on RX1. If the reading is infinity when the door is open and zero when the door is closed, the door switch is not the one causing the problem.

The last thing that you can check on to find out what is the source of the microwave not running is the fan motor. First, you have to locate the fan motor and remove the leads. Probe the terminals of the fan motor with the VOM set on RX1. In case that the reading is infinity, the fan motor is the cause of your problem.

How to fix it if the microwave blows fuses

The first step that you must go through if the microwave blows fuses is to check the door switch. We have described this process in the previous lines. In case that your problem isn’t related to the door switch, move on to the capacitor or the diode.

Discharge the capacitor and test it by removing the leads and setting the VOM to RX100. In case that when you probe the terminals the reading shows infinity, reverse the probes and go through the test again. In case that the reading does not show the same result, the capacitor is the source of the fuses.

To test the diode in case that the capacitor wasn’t the problem you have to disconnect it from the microwave and from the capacitor. Probe the wires after setting the VOM to RX100. Afterward, reverse the probes and do another reading. If the diode isn’t the problem it will show infinity at one of the readings and a lower number at the other reading.

How to fix it if the microwave cooks slowly or unevenly

In case that the microwave is cooking slowly or unevenly, check the voltage at the outlet supplying power. If it’s lower than 115V, you have a problem with the electrical service or breaker. Another cause could be a bad turntable motor. To check if that’s the cause, turn the microwave and remove the bottom grill. Remove one lead from the motor terminals, set the VOM to RX1 and probe the terminals. In case that the reading is infinity, replace the turntable motor.