Panasonic Microwave Error Code H97 H98 Explained

If your Panasonic microwave suddenly flashes H97 or H98, it can be annoying, especially when you’re just trying to warm some food up! These codes might look alarming, but they’re actually just safety messages letting you know something inside the microwave isn’t working quite right.

Both the H97 and H98 error codes are common and generally easy to fix. Let’s cover what the error codes mean, what causes them, and what you can do to resolve them and get your microwave running properly.

What These Error Codes Mean

Panasonic microwaves have a built-in diagnostic system that helps identify problems before they get worse. When the appliance detects an issue, it shuts off and displays a code on the screen.

Both H97 and H98 relate to the inverter circuit, which controls power to the magnetron (the part that creates the microwaves that heat your food). When the inverter senses a fault, it stops the cycle and triggers one of these error codes for safety.

Error Code H97

The H97 error usually means the inverter or power supply system isn’t operating properly. The inverter converts the power from your wall outlet into the steady current the magnetron needs to cook evenly.

If something interrupts that power conversion, like a voltage issue, a loose connection, or an overheating component, the inverter will stop working and show this code. Sometimes it’s caused by a temporary power surge, while in other cases, it may signal that a part inside the inverter is wearing out.

Error Code H98

The H98 error is closely related, but it’s often caused by overheating or cooling problems. If the inverter gets too hot, the microwave automatically shuts down to prevent damage.

This usually happens when:

• The cooling fan isn’t spinning properly
• Air vents are blocked by dust or objects nearby
• The microwave has been running too long without enough airflow

If both H97 and H98 appear one after the other, it often means the inverter system is struggling to manage heat or power correctly.

The Most Common Causes

Here are a few of the most common reasons these errors appear:

• Poor ventilation: When air can’t circulate properly, heat builds up inside.
• Power fluctuations: Sudden surges or dips in household power can disrupt the inverter.
• Dust buildup: Dirt or grease on the vents can trap heat.
• Aging components: Over time, parts inside the inverter board can weaken or fail.
• Faulty cooling fan: If the fan slows down or stops, the inverter can’t cool off fast enough.

4 Simple Fixes to Try First

Before calling a repair service, try a few easy steps. In many cases, they’re all you need to clear the code.

1. Unplug and reset

Disconnect the microwave from the outlet and leave it unplugged for about five minutes. This allows the internal electronics to reset. Then plug it back in and try heating a cup of water for 30 seconds.

2. Check airflow

Make sure the vents on the sides, back, and top of the microwave aren’t blocked. There should be a few inches of open space around the unit for proper cooling.

3. Clean the vents

Dust or grease can collect around the openings. Use a dry cloth or soft brush to gently clean them.

4. Use a surge protector

If you don’t already use one, plug the microwave into a surge protector to help prevent future power-related faults.

If the code disappears after these steps, it was likely a temporary issue. If it returns, the problem may be inside the inverter or cooling system.

Should You Call a Professional?

If the error keeps coming back after a reset or cleaning, it’s time to contact a qualified appliance technician. Microwaves contain high-voltage components that can store electricity even after being unplugged, so they’re not safe to open or repair at home.

You should call a professional if:

• The same code reappears right after restarting
• You hear buzzing, clicking, or notice unusual smells
• The microwave won’t heat or shuts off during operation
• You see scorch marks or any visible damage inside

A technician can test the inverter board, power supply, and fan safely. They’ll also be able to replace any failing parts with official Panasonic components. If your microwave is still under warranty, it’s best to contact Panasonic support first, as repairs may be covered.

Worth Fixing or Time to Upgrade?

Once you know the cause, you’ll need to decide whether to repair or replace your microwave.

If your Panasonic model is fairly new and in good condition, professional repair is usually worthwhile. But if it’s an older unit or showing multiple issues, replacement might make more sense.

A simple way to decide is to compare the situation to the halfway rule: if repairs are likely to cost about half as much as buying a new microwave, replacement is often the better long-term choice.

Newer Panasonic models also tend to be more energy-efficient and come with updated inverter technology that better handles power fluctuations.

How to Avoid This Happening Again

A bit of routine care can greatly reduce the chances of seeing the H97 or H98 error again.

• Keep vents clean and clear: Regularly wipe away dust and grease.
• Leave space around the unit: Allow several inches of room for airflow.
• Use a surge protector: Protects against electrical spikes.
• Avoid long continuous runs: Give the microwave short breaks between heavy uses.
• Watch for early signs: If it seems to heat unevenly or make odd noises, have it checked early.

Good ventilation and stable power are key to keeping the inverter healthy and preventing these error codes from reappearing.

The Bottom Line

Look, nobody wants error codes when they’re just trying to warm up their leftovers. H97 and H98 sound scary, but they usually just mean your microwave needs some air or a quick reset.

Try the easy fixes first: unplug it, clean the vents, give it space. Still acting up? Get a technician to sort it out. Keep those vents clear going forward, and you’ll be back to reheating leftovers without any drama.