Panasonic Microwave Code H98? (here’s why & how to fix)

Microwaves make life easier because they can cook or heat up our favourite foods quickly. Sometimes, they develop faults and if you own a Panasonic microwave it’s possible that it is displaying the H98 error code.

The H98 error code indicates a problem with the magnetron not drawing enough power, which is a relatively common fault with Panasonic microwaves. 

This could be caused by problems with the magnetron or it might be something like a wiring fault or an interrupted power supply.

Keep reading to find out all about the H98 error code and the best ways to fix this issue.

First, Try To Reset The Microwave

In some cases, the error code has been displayed because of a software issue or electrical glitch. If this is the case, you can often clear the fault by disconnecting the power supply for 10 to 15 minutes.

If this fails to work, you can try pressing the reset button on the control panel.

“Reset For Service”

Your Panasonic microwave has a fail safe installed which means that if the H98 error code has been displayed twice or the H97 error code appears three times, the microwave will not operate anymore. 

Even if any defective parts have been replaced, the appliance will not work. Unless you use the reset for service function. To reset for service you will need to;

1. Ensure the appliance is plugged in
2. Press the stop/reset button once
3. Open the door of the appliance
4. Press and hold the start button for around 2 seconds until it beeps
5. Press the stop/reset button 3 times
6. Press the start button once

If you have successfully followed these steps, the display screen should now show End. If the problem persists, you will need to contact Panasonic if the appliance is still on warranty or a technician if not.

What Causes The H98 Error Code On A Panasonic Microwave?

There are a number of things that could be the cause of the H98 error code on a Panasonic microwave which include;

Probable Cause	Solution
Damaged Power Cord	Check power cord for damage and replace if necessary
Obstructed Doorway	Ensure the doorway is clear of any obstructions
Defective Door Switches	Check the door switches and replace if necessary
Defective Diode	Replace the diode if faulty
Defective Oscillator Coil	Replace the oscillator coil if necessary
Faulty Inverter	Inspect and replace the inverter if necessary
Faulty Magnetron	Inspect and replace the magnetron if necessary

Let’s take a closer look at each of these issues;

Damaged Power Cord

The H98 error code on a Panasonic microwave indicates that the magnetron isn’t drawing enough power. This makes the power cord the first place to inspect.

If the power cord is frayed or damaged in some way, it could prevent enough power from entering the appliance. You should inspect the power cord and check that the plug is fully inserted into the wall socket.

You should also check that the socket is working correctly by plugging something else like a lamp into the socket and check that it operates correctly.

Obstructed Doorway

In some cases, the H98 error code could be displayed because there is a small obstruction which is preventing the door from closing fully. All it takes is a small crumb or piece of aluminium foil to prevent the seal from fully sealing the door or causing an interruption in the power which can affect the magnetron and cause the H98 error code to be displayed.

Defective Door Switches

The door switches could have become burnt or shorted just enough to prevent them from actuating properly. This could be enough to cause the H98 error code to be displayed.

As inspecting the door switches involves dismantling panels on your microwave. With some of the components on your microwave carrying a lethal electrical charge long after the appliance has been disconnected from the power supply, we recommend getting a technician to investigate the door switches for you.

Defective Diode

The high voltage diode in your Panasonic microwave works in conjunction with the high voltage capacitor to turn alternate current (AC) into direct current (DC) and double its voltage.

If the diode develops a fault or becomes burnt out, the magnetron won’t receive enough power to work properly.

As accessing the diode exposes you to high voltage even after the appliance has been disconnected from the power supply, we recommend getting a technician to investigate and replace the diode if necessary.

Defective Oscillator Coil

The oscillator coil is designed to control the level of power output by the magnetron in the microwave. If the oscillator coil becomes defective, the magnetron might not produce enough power leading to the H98 error code being displayed.

This is definitely a job best left to a technician.

Faulty Inverter

If you can hear clicking or squealing noises when the microwave is in operation, or there is a smell like electricity, it could be that the inverter is failing.

The problem is likely to be caused by one or more of the soldered connections failing as they were not fitted correctly. If the inverter is the cause of the issue, your technician will advise you to replace the inverter as this will be less expensive than repairing the old inverter.

Faulty Magnetron

The magnetron in your microwave uses high voltage DC power to generate power to heat up the food and drinks. If it does develop a fault, it cannot be repaired and will need to be replaced.

However, please be aware that the magnetron can store enormous amounts of high voltage power which could be fatal if touched. We recommend getting a technician to investigate and replace the magnetron if necessary.

How To Tell If The Magnetron Is Developing A Fault

There are a few ways to tell if the magnetron is becoming faulty which include;

• Sparks
  If you notice sparks inside the chamber of the microwave when it is running there are a number of possible reasons for this including; food with a high mineral content, metal present in the chamber, food crumbs present in the chamber or more likely, a malfunctioning magnetron
• Unusual Noises
  If you regularly use your microwave you will be familiar with the sounds it makes. If you start to hear an unusual noise like a hum or vibrating sound or even the sound of groaning or grinding, it could indicate the magnetron is becoming defective.
• Microwave Not Heating Food
  If your microwave won’t start or fails to heat up your food, it could be a sign of a number of things including a faulty diode, faulty door switches or a faulty magnetron.

We cannot stress enough that any internal component of a microwave can be lethal if touched even with the power supply disconnected. Which is why we recommend contacting a technician to investigate and replace any parts including the magnetron.

Ways To Prevent The H98 Error Code

Once you have successfully solved the problem of the H98 error code, there are a few things that you can do to help prevent it from happening again. These include;

• Always Follow Manufacturers Instructions
  You should familiarise yourself with the user manual that came with your Panasonic microwave. Make sure you are familiar with the correct settings to use for each function including power levels, cooking times and safety precautions.
• Always Use Microwave Safe Containers
  It is extremely dangerous to use any containers in the microwave that are metallic. These will not only cause sparks in the appliance but can also damage the magnetron.
• Have A Regular Cleaning Schedule
  You should clean the interior of the microwave using warm water and a gentle detergent (washing up liquid) to remove any food splatters, spills or crumbs. Never use any harsh chemical cleaners that could cause damage to the coating on your appliance.
• Close The Door Gently
  Avoid slamming the door of your microwave, treat it gently to prevent damage. This will help to keep the door and hinges in perfect alignment as well as preventing any damage to internal components. Or loosening any wires or connections.
• Never Run The Microwave When Empty
  You should never run the microwave without anything inside of it. This could lead to excessive heat build up and damage to the magnetron. Always check there is something inside the microwave before you start it.

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