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How To Troubleshoot A Microwave

What would cause a microwave to stop working?

The most common cause for a microwave oven not working at all is a blown main fuse. The microwave main fuse will cut the flow of electricity if too much current passes through it. There can also be thermal fuses, cavity fuses, and thermoprotectors which will interrupt the electrical flow if the microwave overheats.

Is there a reset button on a microwave?

A soft reset is simply turning off the microwave oven to cancel or erase the program you’ve input in the microwave. To do this, you will just simply press on the Off/Clear button. Pressing Off/Clear button and holding it for about 3 seconds will also resolve the Control Locked feature of the microwave.

Are microwaves worth repairing?

If your microwave is relatively new and the repair costs less than replacing it, the fix is worth it. In general, the microwave problems worth fixing include these: Interior light malfunction. Door switch problems.

Where are the fuses on a microwave?

Fuses are located in many places inside the microwave, including the top, side, and behind the vent grille. Using the wiring diagram can help you locate the appropriate fuse. Once you have located the fuse, remove any necessary wires and fasteners to free it from the microwave.

Will microwave turn on if fuse is blown?

In the most common scenario, your microwave will start up and run with no issue. This verifies that nothing that takes just 120 volts like your door switches and electronic control is causing the issue.

What happens when a microwave fuse blows?

Thermal fuses will blow to prevent the microwave from overheating and potentially causing a fire. If the microwave blows a fuse when started, the most likely cause is that the high-voltage capacitor has shorted out and needs to be replaced.

Can a power surge damage a microwave?

Household appliances such as microwaves sometimes fall victim to power surges. These brief but powerful spikes can cause irreparable damage to your home equipment. Like other appliances, your microwave is vulnerable to damage during these surges.

What causes a magnetron to fail in a microwave?

This is caused by the magnetron over heating, some instances this is because of reflected microwave energy. Solution: Replace the magnetron and check why the magnetron has overheated. Burnt or melted antenna cap. Burned Dome (or Antenna) caused by arcing due to reflected microwave energy {back feeding}.

Is it worth replacing a magnetron in a microwave?

No matter how new your microwave or if there’s only one problem, if the magnetron is out then you might as well replace the entire appliance. The magnetron is the heart of a microwave that actually makes the micro-waves. Replacing it is about equal to the cost of buying a whole new microwave, sometimes even greater.

How do you check a microwave is working?

Microwave Performance Test Place a glass bowl (preferably a 2qt. glass measuring bowl) with 1qt. Heat the water for exactly 2 minutes 30 seconds on High (this is the default setting). A temperature rise in the range of 28-40 degrees Fahrenheit (15-22 degrees Celsius) indicates that the oven is cooking properly.

How do I reset my microwave?

If the controls are still not responding, attempt a reset on the microwave by unplugging the unit for 2-3 minutes. Plug the microwave back in and attempt the use the microwave again. If the controls are still not responding, the microwave will require repair service.

What is the life expectancy of a microwave?

The average microwave oven lasts about seven years with normal use, and even less with heavy use and poor maintenance. A large family may find themselves replacing their appliance every four to five years as they become more reliant on its use to heat up snacks and leftovers, or to defrost meals.

Why does my microwave run but not heat?

If the microwave is running but not heating your food, another possibility is the diode has burnt out. A diode allows the electrical current to flow in only one direction. If the diode fails, it could mean there is a short, which will allow the current to flow in both directions, or only part way in one direction.

What can you do with an old microwave?

If there is still a little life left in your microwave, microwave disposal is more straightforward. Clean the appliance thoroughly and drop it off at your local Goodwill or similar thrift store. Or, donate it to a student heading off for college, list it on Craigslist or Freecycle.

How much does a microwave fuse cost?

Microwave Fuse Replacement Cost Fuse replacements for a microwave cost between $50 and $100 on average. This is one of the cheapest and simplest microwave repair jobs. Many appliances have fuses, and over time, it is natural for fuses to wear out or blow.

What kind of fuse does a microwave use?

Compare with similar items This item Microwave Fuse Ceramic Fuse Cartridge Fuse 20 Amp 250V Slow-Blow Compatible and Universal Replacement for GE WB27X10388 and Whirlpool Kenmore Other Microwaves 5 PCS Product Name Add to Cart Customer Rating 4.5 out of 5 stars (1471) Price $699.

How do you tell a fuse is blown?

Remove the fuse from its holder. In some cases you may need a small screwdriver to unscrew the fuse holder cap. Look at the fuse wire. If there is a visible gap in the wire or a dark or metallic smear inside the glass then the fuse is blown and needs to be replaced.