how to fix panasonic microwave h98

Understanding the H98 Error Code

h98 error code

Most appliances, including your Panasonic microwave, albeit highly reliable and durable, can sometimes encounter faults requiring quick troubleshooting. One of the most common issues with these devices is the h98 error code, a message that appears on your microwave’s display panel. This error usually indicates one of several problems, from power issues to defective components. The following features describes the issues that lead to the h98 error code and what you can do to solve them.

The h98 error code indicates a problem with your microwave’s inverter circuit. It is prevalent in newer models and signals that the high voltage inverter boards in your microwave may have malfunctioned. Inverter circuit failures are usually accompanied by a voltage-transmitting error that renders your microwave useless. The voltage error may also cause your microwave to shut off mid-cooking cycle or refuse to turn on altogether. Some of the most common problems associated with the h98 error code include a damaged magnetron tube or a faulty power relay board.

An inverter microwave, essential in newer models, is a critical component in keeping your food moist and evenly cooked. It does this by operating the microwave at a low power level to match the energy requirements of the food, and when it needs to, it heightens the energy levels to cook the food quickly. So, a malfunctioning inverter board negatively impacts the cooking process of your favorite foods.

Another possible issue that leads to the h98 error code is a problem with your microwave’s magnetron, the component that generates microwaves for cooking food. If the magnetron gets damaged or burned out, it will no longer produce the necessary microwaves to cook your food. This makes your microwave useless. The h98 error code may indicate a damaged magnetron tube when it’s coupled with a low or absent humming sound from the microwave.

A faulty power relay board may also be the cause of h98 error codes. The power relay board is the component responsible for supplying power to various other components in your microwave. It may malfunction and cause voltage transmission errors, leading to the h98 error message. These voltage errors may also cause your microwave to randomly stop working or shut off mid-function.

The h98 error code can show up on your Panasonic microwave for several reasons. If you’ve gone through the troubleshooting steps and cannot identify the problem, it’s best to consult a Panasonic authorized repair center to fix the issue. However, there are a few things you can do to determine whether the inverter circuit is the cause of the problem.

You can start by checking the microwave’s circuit breaker switch or fuse to ensure they are not tripped or burnt out. If they are, it usually means the circuitry in the device is overloaded and will need repair. Also, ensure that the microwave’s door is correctly closed as it could cause the h98 error message to display. If the door is closed properly, you can then check the inverter circuit board for any visual damage, such as burn marks or signs of overheating. Always remember to disconnect your microwave from power and any direct power sources before removing any microwave components or attempting to fix them.

In conclusion, understanding the h98 error code on your Panasonic microwave helps you determine what the problem might be and the possible solutions. Always ensure your microwave is disconnected from power sources before opening its panels for troubleshooting. If you are unsure or cannot identify the problem causing the h98 error code, it is advisable to consult a professional technician to avoid causing further damage to your microwave.

Checking for Power Issues

If your Panasonic microwave’s digital display shows an H98 error code, then it means that you have a problem with the power supply, which could be electrical, magnetron related, or mechanical. To rectify this problem, you must first check for power supply issues before moving onto other possible causes. Below are some steps to help check whether the power supply is the issue.

1. Check if the power cord is plugged in correctly – Ensure that the power cord is plugged into the wall socket securely. Check if the socket is functional by plugging in another appliance to verify whether it gets power. If the socket is working, then you can proceed to the next step.

2. Check for tripped circuit breakers – Overloading circuits, power surges, or a faulty fuse are some common reasons why a circuit breaker may trip. If you are not sure about what causes it to trip, then you can unplug all other devices from the socket, except the microwave, then check if the circuit breaker still trips. If the breaker trips again, it’s likely that there’s a fault in the circuit breaker, and you’ll need to get a licensed electrician to inspect it. If it doesn’t, plug the other appliances one by one and turn them on to see which one causes the circuit breaker to trip. By doing so, you’ll be able to identify which appliance is causing the problem.

3. Check the power outlet voltage – Your microwave requires 120 volts of alternating current that must remain constant. Fluctuations in power supply can lead to an H98 error. To check if the power outlet is providing the required voltage, use a multimeter. Set it to read alternating current, plug it in the power outlet, and switch it on. If the multimeter reads below 110 volts or above 130 volts, then the power supply is not providing adequate voltage to your microwave, and you’ll need an electrician to check it.

4. Check the fuse – A blown fuse can lead to an H98 error code. Locate the fuse housing unit under the microwave and remove it using a screwdriver. Check the fuse resistance using a digital multimeter. If the resistance reads zero or overload, then it’s likely that the fuse is blown and you’ll need to replace it. If it’s not, then it’s unlikely the cause of the issue.

5. Check the power supply PCB unit – When all else has failed, checking the power supply PCB unit is the last option. You’ll need to take it apart from the microwave and check each component’s function and the soldering points for any signs of damage such as blackened spots. If you can’t locate any visible issue, run a multimeter test to see if each component is working correctly. If you find any component that’s not working, you can have it replaced or repair it if possible.


Checking for power issues in your Panasonic microwave H98 error code is the first step in the diagnosis of the problem. By following the above steps, you’ll be able to identify the exact cause of the issue and determine if you can fix it yourself or need professional help. Always remember to disconnect the appliance from the mains before carrying out any electrical checks.

Testing the Inverter Board

Testing the Inverter Board

If your Panasonic microwave is displaying the error code H98, it could be due to a faulty inverter board. The inverter board is responsible for powering the magnetron, which produces the microwaves. If the inverter board is not functioning properly, it can cause the H98 error code to appear. To test the inverter board, follow these steps:

Step 1: Safety First

Before attempting any repairs, it is essential to prioritize your safety. Turn off the power supply to your microwave by unplugging it from the wall. Additionally, discharge the high-voltage capacitor to ensure that it is safe to handle the internal components of the microwave.

Step 2: Access the Inverter Board

The inverter board is located inside the control panel of your microwave. Remove the outer cover and locate the board. Carefully disconnect all the wires attached to the board. Take a photo or make a diagram of the wire connections for reference later.

Step 3: Inspect the Inverter Board

Using a multimeter, check the inverter board for continuity and resistance. Look for any signs of damage such as burnt or bulging capacitors, loose or broken components. If you see any, it is an indication that the inverter board is malfunctioning and needs to be replaced.

Step 4: Check the Rotor Position Sensor

If the inverter board appears to be in good condition, test the rotor position sensor which is responsible for regulating the current supplied to the motor. A faulty rotor position sensor can also contribute to the H98 error code. To test the sensor, disconnect it from the inverter board and test it using a multimeter. If the sensor is not functioning correctly, replace it and reassemble the microwave.

Step 5: Reassemble the Microwave

After the inverter board and components have been tested, replace any damaged parts and reassemble your microwave. Remember to reconnect all the wires in their previous positions. Once the microwave is fully assembled, plug it back into the power supply and turn it on. Check if the H98 error code reappears. If it does, it indicates that the issue is not with the inverter board and that there may be other underlying problems that need to be addressed.

In conclusion, testing the inverter board and rotor position sensor can help diagnose the cause of the H98 error code in Panasonic microwaves. It is a relatively straightforward process that can save you money and time on repairs. However, if you are not confident in conducting these tests, it is recommended that you seek the services of a professional.

Inspecting the Magnetron

Microwave Magnetron

If your Panasonic microwave oven is turning on but not heating, it’s likely that the magnetron, which produces the energy to heat the food, may be faulty. In this case, you can inspect the magnetron to find out if it’s the cause of the problem.

First, turn off the microwave oven and unplug it from the power supply. Next, remove the outer cover of the microwave by unscrewing the screws and lifting it off. You will now be able to locate the magnetron tube, which is usually a silver cylindrical component attached to the oven cavity with a few screws.

Carefully examine the magnetron tube for any visible signs of damage, such as cracks, burn marks, or rust. If the tube appears to be damaged in any way, you will need to replace it. However, if there are no visible signs of damage, you can perform a continuity test to determine whether the magnetron is functioning correctly.

To perform the continuity test, you will need a multimeter set to the resistance mode. Place one probe on the magnetron terminal and the other probe on the metal casing of the magnetron. If the reading is infinity, it means that the magnetron is faulty and needs to be replaced. However, if the reading is zero, it indicates that the magnetron is functioning correctly.

Another way to check the magnetron tube is to use a microwave radiation leakage detector. This device can detect any leakage of microwave radiation from the magnetron. To use this device, place it near the magnetron and turn on the microwave oven. Any leakage detected by the device indicates that the magnetron is faulty and needs to be replaced.

It’s important to note that the magnetron is a hazardous component of the microwave oven and should only be handled by trained professionals. Do not attempt to repair or replace the magnetron yourself if you’re not experienced in handling electronics. Always follow proper safety procedures when working with microwaves, such as wearing protective gloves and ensuring that the oven is disconnected from the power supply before performing any inspections or repairs.

After inspecting the magnetron and determining whether it needs to be replaced, you can either do the replacement yourself or seek professional help. If you choose to replace the magnetron yourself, be sure to purchase the correct model and follow the installation instructions carefully. It’s also a good idea to double-check the connections and ensure that all screws are tightened properly.

By following these steps, you can effectively inspect the magnetron in your Panasonic microwave oven and identify whether it’s the cause of the heating problem. Whether you choose to repair the magnetron yourself or seek professional help, always prioritize safety and take appropriate precautions to prevent accidents or injuries.

Replacing Faulty Components

Panasonic Microwave H98 repair

If your Panasonic microwave display shows an error code of H98, it could be because of faulty components that need to be replaced. This error code indicates that there is a problem with the magnetron, inverter circuit, or both. Here are the steps to fix this issue by replacing the faulty components:

Step 1: Identify the faulty component

The first step is to identify the faulty component causing the H98 error code. Generally, the error code indicates that the magnetron or inverter circuit is faulty. You can easily find the problematic component by following the service manual included with the product or checking the online manual for the same. Most products come with a detailed manual that lists all the parts and gives a breakdown of the processes involved.

Step 2: Get the replacement part

Once you have identified the faulty component, you need to get a replacement part. Make sure the replacement is the exact same part as the original one. If you are unsure about the replacement part, you can reach out to the manufacturer or authorized dealer for help.

Step 3: Turn off the power supply and unplug the microwave

Before you start replacing any components, ensure that the power supply is turned off, and the device is unplugged. This will ensure your safety and prevent any damage to the components.

Step 4: Open the back panel of the microwave

Remove the screws that hold the back panel of the microwave in place, and then take off the panel. This will give you access to the components that need to be replaced.

Step 5: Replace the faulty component

Now that you have access to the faulty component, carefully remove the damaged part by unscrewing it or detaching it as needed. You can then replace it with the new part, ensuring that it is correctly inserted and fastened securely in place.

It is essential to be cautious while handling the microwave by ensuring that you do not touch any electrically charged components. If you are unsure about the installation process, you can follow the instructions included in the manual, watch video tutorials online, or better yet, seek professional help.

Step 6: Test the microwave

Once you have replaced the faulty component, reattach the back panel to the microwave, plug it in, and power it up. Test the device to ensure that it is working correctly and the H98 error code has disappeared. If the error code continues to show up, it might be because of other components malfunctioning and may require the attention of a professional technician.

Finally, after completing the repair, remember to dispose of the old damaged parts appropriately. The faulty components can be dropped off at a recycling center, or you can consult with the manufacturer for advice on how to dispose of it.

In conclusion, replacing the malfunctioned component is a viable solution to fix the H98 error code in a Panasonic microwave. However, only handle the repair if you are confident about the process and ensure to take appropriate safety and precautionary measures. If you don’t feel comfortable performing the task, seek professional help.

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