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Microwave display not working
Common reasons your microwave display not working
The most common reasons your microwave display is not working are a bad thermostat, malfunctioning electronic control board or a broken switch.
52% of the time it's the Thermostat
24% of the time it's the Electronic Control Board
14% of the time it's the Switch
10% of the time it's the Something else
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Common microwave repair parts you may need
Replacing one of these microwave parts may fix your problem.
Thermostat Replacement
A faulty thermostat in a microwave can lead to various problems, mainly affecting the power to its components. Microwaves are equipped with multiple internal thermostats designed to ensure safety in case of component failures. For instance, many microwaves feature a magnetron thermostat, which triggers if it detects excessive current or high temperatures near the magnetron in the microwave cavity. Additionally, another thermostat monitors the cooking cavity's temperature and activates if it becomes too high. If any of these thermostats trip, the microwave won't start, and its lights, fans, and display will not function. Due to the presence of high-voltage parts like transformers and capacitors, which can retain dangerous electricity even when unplugged, it's crucial to have a Sears Home Services professional inspect the microwave and handle any necessary repairs.
Electronic Control Board Replacement
If a microwave's electronic control board is not working properly, it can result in various malfunctions, such as a lack of power or heating, or it might prevent the microwave from shutting off. This occurs because the board acts as the central control hub for the microwave, overseeing essential components like the magnetron (which heats food), cooling fans, lights, turn-table motor, cooking times, power level settings, and the display. When the electronic control board malfunctions, it can disrupt communication among many different parts. A faulty board might also produce a chattering or clicking noise or emit a burning smell. Because of the potential impact on multiple components, it is recommended to have a Sears Home Services professional perform diagnostic tests on the board to determine if replacement is necessary.
Switch Replacement
If a microwave has a faulty switch, it can lead to various issues, primarily affecting the power to its components. Microwaves are equipped with several internal thermal switches and interlock switches designed to ensure safety in case of component failures. Door interlock switches, for example, prevent the microwave from operating when the door is open to avoid exposure to harmful radiation. Additionally, many microwaves feature a magnetron thermal switch that triggers if it detects excessive current or high temperatures near the magnetron in the microwave cavity. Another thermal switch monitors the temperature of the cooking cavity and activates if it becomes too high. If any of these switches fail, the microwave won't start, and its lights, fans, and display will not function. Due to the presence of high-voltage parts like transformers and capacitors, which can retain dangerous electricity even when unplugged, it's essential to have a Sears Home Services professional inspect the microwave and handle any necessary repairs.
What to expect when you experience a microwave display not working issue
How to fix a display not working problem in a microwave
Fixing most issues where the display isn't working typically requires replacing the thermostat, electronic control board, or switch. However, because there are numerous potential causes, conducting a thorough diagnosis is crucial for resolving the problem. An accurate diagnosis is essential for understanding the extent of the repair needed.
Sears Home Services advice for a microwave display that is not working
If the microwave display isn't working, there could be various reasons behind it. To prevent unnecessary part replacements, we suggest having a Sears Home Services professional conduct diagnostic tests to pinpoint the root cause of the issue. Our technicians have extensive experience in diagnosing all types of microwave problems.
What to look at with a microwave display not working diagnosis
Figuring out what's wrong with modern appliances without the right knowledge and training can be tough. If you don't use the right diagnostic techniques, trying to fix your microwave problem might mean just guessing and changing parts. Appliances, especially newer ones from the past 10 years, have gotten really advanced, with lots of electronic parts that are tricky to test. Doing your own repairs on the latest appliance models is getting harder and harder.
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Michael C offered an excellent service
5 stars!!! Michael was quick and knowledgeable! Very accommodating and professional
Andreina G, Naples, FL
microwave
Mark really went over the microwave trying to fix it, this was his second time here for the same problem. August till ? till we get it replaced. we appreciate him for his knowledge of his job. thank you Mark
H M, Cadiz, OH
Customer
Mr. David is very polite and intelligent gentlemen. He came to replace a part on my microwave and he checked the microwave to make sure it was working properly. Mr. David gave me a courtesy call that he will be arriving in 15mins. He arrived on time for the appointment and took care of his job duties. Thanks Mr. David for all the hard work you do at Sears. Keep up all the good work.
Pamela W, Baltimore, MD
Frequently Asked Questions
Repair Microwave Resources
Discover the top causes of microwave malfunctions in 2025 with Sears Home Services.
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Learn how a convection microwave oven works and how to maintain it.
Is it worth repairing a microwave? Find out the pros and cons of repairing your microwave at Sears Home Services.
Glossary Terms
A microwave diode is an electrical component that allows current to flow in one direction only, playing a crucial role in converting incoming electrical power into the microwave energy that cooks the food.
A microwave sensor is a technologically advanced feature in modern microwave ovens that measures vapor (steam) emitted by the food, adjusting the cooking time and power levels automatically for optimal results.
A microwave waveguide cover is a small, often mica or plastic piece inside the microwave that covers the opening where microwaves enter the cooking chamber, protecting the microwave's internal components from food splatter and ensuring efficient distribution of the microwaves.
A microwave magnetron is a component in microwave ovens that generates the microwaves used to cook food.