Why is my LG microwave running but not heating?

This issue is often caused by a malfunctioning magnetron, faulty door switches, or problems with the high-voltage components.

Can I repair my LG microwave myself?

While some minor issues like checking the door latch can be addressed at home, repairs involving high-voltage components should be handled by a professional.

How much does it cost to repair an LG microwave that’s not heating?

Repair costs can vary depending on the issue. Replacing a magnetron, for example, can cost between $100 and $200, while simpler repairs may be less expensive.

Is it worth repairing my microwave, or should I replace it?

If your microwave is relatively new and the repair cost is reasonable, it’s often worth repairing. For older models, replacement may be a better option.

LG Microwave Not Heating

Is your Frigidaire refrigerator ice maker not making ice, but the water dispenser is working perfectly? While it may seem like a minor issue, not having ice when you need it can be frustrating. Fortunately, understanding the potential causes of this problem and knowing how to troubleshoot and fix it can help you get your ice maker back in action. Learn about the most common causes of why your Frigidaire refrigerator’s ice maker may not be making ice, even though the water dispenser is functioning correctly.

Extend the Life of Your Appliance

Find Your Solution Here!

Learn More

Key Reasons for the Problem:

50% of reported issues are the

Magnetron

30% of reported issues are the

High Voltage Diode

15% of reported issues are the

Capacitor

5% of reported issues are the

All Other Causes

One Plan. Every Appliance. Zero Stress.

Extended warranties only cover one item. Liberty Home Guard protects all your appliances and systems under one simple plan.
If it breaks, we’ve got you covered—no matter the brand.

Get My Free Quote

Diagnostic and Troubleshooting Steps

Is your LG microwave not heating? This step-by-step guide covers everything from microwave components to power issues, offering practical solutions.

Step 1:

Check the Power Supply

Ensure that the microwave is plugged into a functioning power outlet. A tripped circuit breaker or faulty outlet could be the culprit.

Step 2:

Inspect the Door

Open and close the microwave door to ensure it’s latching properly.
Look for any debris or misalignment in the door switches.

Step 3:

Test the Magnetron

If you’re comfortable working with appliances, you can test the magnetron for continuity using a multimeter.
If the magnetron is defective, it will need to be replaced.

Step 4:

Examine the Diode and Capacitor

Inspect the high-voltage diode and capacitor for visible signs of damage, like burns or cracks.
Testing these components requires caution, as they store electrical energy even when the microwave is unplugged.

Step 5:

Look for Error Codes

Some LG microwaves display error codes to indicate specific problems. Refer to your user manual or LG’s online resources to interpret these codes.

Step 6:

Get a Home Warranty for Fast Appliance Support

Need a quick repair? Home warranty companies such as Liberty Home Guard connect you with service pros.

Key Actions for Homeowners:

Regularly clean the drain filter every month to prevent blockages.
Inspect the drain hose periodically for clogs, kinks, or damage.
Avoid using excessive detergent, as it can create residue buildup that clogs filters and hoses.
Always check pockets for small objects before starting a wash cycle.
Have your washer serviced regularly to ensure all components are in good working condition.

Most Common Repairs Needed to Fix LG Microwaves

When your microwave is not heating, certain repairs are more commonly required than others. Below are the most frequent fixes:

Replace a Faulty Magnetron: The magnetron generates the microwaves that heat your food. When it fails, replacing it is often the only solution.
Fix or Replace the Diode: A damaged high-voltage diode can prevent the microwave from producing sufficient heat.
Repair the High-Voltage Capacitor: This component stores and releases energy to power the magnetron. A damaged capacitor can disrupt heating.

GET YOUR QUOTE

Frequently Asked Questions

Why is my LG microwave running but not heating?
This issue is often caused by a malfunctioning magnetron, faulty door switches, or problems with the high-voltage components.
Can I repair my LG microwave myself?
While some minor issues like checking the door latch can be addressed at home, repairs involving high-voltage components should be handled by a professional.
How much does it cost to repair an LG microwave that’s not heating?
Repair costs can vary depending on the issue. Replacing a magnetron, for example, can cost between $100 and $200, while simpler repairs may be less expensive.
Is it worth repairing my microwave, or should I replace it?
If your microwave is relatively new and the repair cost is reasonable, it’s often worth repairing. For older models, replacement may be a better option.

Want to view more?

The Most Consumer Centric
Home Warranty Provider.

Homeowners across the country recommend Liberty Home Guard Home Warranty above all others.
Don’t just take our word for it—Liberty Home Guard Reviews speak for themselves!

Talked with Brad Spelling and Lucas ...

Talked with Brad Spelling and Lucas Marin. They were cordial and explained the details of the plan very well.

Rohit N.

Albert Cendejas, the technician who ...

Albert Cendejas, the technician who installed my HVAC, was very professional and thorough with his work. His attention to detail a...

Barb R.

Rocky Phillips called us to accept a...

Rocky Phillips called us to accept a plumbing job. It was easy and quick to accept. We enjoy working with Liberty Home Guard and t...

Diamond Plumbing

I am impressed with the service I re...

I am impressed with the service I received from Keith Gordon. He explained extensively and clearly what in included in the warrant...

Exie R.

This is review is for Kato Nunez. He...

This is review is for Kato Nunez. He was a great in resolving my issue. I really appreciate his patience and excellent customer se...

Mohammad K.

layla helped me process my claim She...

layla helped me process my claim She was very helpful and I could not have done it without her cheerful help

Suzanne Q.

Orlando Peralta provided excellent c...

Orlando Peralta provided excellent customer service. He thoroughly explained the status of my claim and what I needed to do. He pr...

JSL

Oscar was very thorough and competen...

Oscar was very thorough and competent. He arrived on time and finished the electrical work quickly. He was very friendly and answe...

Mimi C.

We had an excellent experience from ...

We had an excellent experience from start to finish! Great communication, our issue was resolved within approximately 1 weeks time...

Jacqueline L.

Comprehensive coverage and fast easy...

Comprehensive coverage and fast easy sign up. Much more competitive than other options in the market.

Joe M.