Microwave Making Noises? (Top 5 Reasons Why) – Flamingo Appliance Service

Microwave ovens are one of the most normally used home appliances. If your microwave is making strange noises, it is most likely because a function needs replacing ascribable to such heavy usage. however, before replacing any parts, see if either turning the microwave off and on at the ability informant or cleaning the microwave solves the noise issue .
The make noise your microwave is making and where it is coming from will help you find out what the publish is. A grinding sound from inside the microwave indicates it is the scaremonger motor, while a crunch or clicking noise from the base of the microwave indicates it is the turntable. A high pitch or forte hum points to the magnetron or diode, while a rattle or buzzing sound from the rear of the microwave indicates the cooling system winnow is at demerit .
Before repairing a microwave, be aware that it can be identical dangerous .

Exercise Extreme Caution

The high-voltage capacitor inside the microwave can store a deadly sum of electricity, even after the microwave has been disconnected from the world power for months. To safely access electrical components in the microwave, the capacitor must be discharged. You should be very confident you know what you are doing and are protected from electrocution before discharging the capacitor.

due to the risk of electrocution, it is recommended that a discipline microwave professional be used to repair the more complex issues .

1. Faulty Magnetron

The microwave ’ s magnetron is responsible for producing the high-frequency electromagnetic waves that cook the food. When you run your microwave on a low jell, you can much hear the magnetron switching on and off to reduce the microwave frequencies while cooking the food. If the noise your microwave is making sounds like the magnetron except forte, it suggests that a defective magnetron ( or diode – see below ) is to blame .
A faulty magnetron can besides cause an annoying high strait, which indicates that the magnetron metro is failing due to old age and heavy custom .
You can further diagnose a magnetron issue by running the microwave on a moo context and seeing if the microwave noise reduces or stops as the magnetron turns on and off while cooking at the low set. A burning smack besides indicates a problem with the magnetron .
Follow these steps to diagnose and fix a defective magnetron :

  1. Unplug the microwave from the power source.
  2. Remove the top microwave cover to access the magnetron.
  3. Discharge the capacitor.
  4. Use a multimeter to test the magnetron for continuity. Each reading should be less than one ohm.
  5. If defective, remove and replace the magnetron.

Always exercise caution when accessing the magnetron .

2. Faulty Diode

The diode is a separate of the high-octane circuit, along with the magnetron and capacitor. It converts alternating current to direct current to produce the high voltage needed to world power the magnetron. A defective diode typically makes a loud humming make noise .
Follow these steps to diagnose and fix a defective diode :

  1. Make sure the microwave is unplugged from the power source.
  2. Remove the top microwave cover to access the diode.
  3. Discharge the capacitor.
  4. Use a multimeter to test the diode for resistance. Depending on the model, a healthy diode will read between 50,000 and 200,000 ohms.
  5. Check for continuity in the opposite direction by reversing the meter leads. There should only be continuity in one direction.
  6. If the diode is defective, it will need to be replaced.

Always exercise caution when accessing the diode .

3. Faulty Cooling Fan

A trouble with the cooling fan is another rationality for microwave noise. Sometimes the cooling system sports fan becomes dislodged or debris gets caught in it. This could be causing the sports fan to clip against another separate of the microwave or be causing a rattle strait .
The cool sports fan motor can besides wear out and may need replacing. typically, you will be able to hear the cool fan when the microwave is operating normally. however, if that noise becomes louder or the microwave is making a buzz make noise, normally from the rear of the microwave, it indicates a problem with the cooling winnow motive.

Accessing the cooling fan may require the removal of other microwave parts. It is recommended that you exercise circumspection and discharge the capacitor .
Follow these steps to diagnose and fix a defective cooling winnow :

  1. Unplug the microwave from its power source.
  2. Discharge the capacitor.
  3. If necessary, remove any components blocking access to the fan.
  4. Examine the fan to see if it is spinning freely. If the fan is not obstructed but is not spinning freely, it indicates that the fan motor will need to be replaced.
  5. Test the cooling fan motor for continuity with a multimeter. Depending on the model, a working cooling fan motor should read 280 ohms.
  6. If defective, replace the fan motor.

4. Faulty Turntable Motor

Another informant of microwave noise is the turntable motor. A defective turntable drive typically makes a snap or grinding sound. On most models the turntable motor can be accessed from underneath the microwave. If you can not access it from underneath, you will need to remove the microwave case .
Follow these steps to diagnose and fix a faulty turntable motor :

  1. Unplug the microwave from the power source.
  2. Before accessing the turntable motor, remove the turntable plate and support roller from the microwave.
  3. Unscrew the turntable motor panel.
  4. Test the turntable motor for continuity with a multimeter. If there is no continuity, it will need to be replaced.

5. Stirrer Motor

The scaremonger drive powers a metallic blade that deflects microwave energy throughout the microwave. The stirrer makes certain that food in the microwave is cooked evenly. A faulty scaremonger motive typically makes a grinding phone as the motive struggles to keep up .
Follow these steps to diagnose and fix a faulty stirrer motive :

  1. Unplug the microwave from the power.
  2. Access the stirrer motor from inside the microwave cavity, above the turntable plate.
  3. Remove the stirrer motor cover.
  4. Check that the stirrer blade has not become loose and is not damaged. You may be able to disconnect the stirrer motor and run the microwave to see if it still makes noise with the stirrer motor disconnected.
  5. If the stirrer motor is damaged, replace it.

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