H98 error While attempting to operate microwave display reads H98 and unit will not function. problem appeared suddenly. Unit just one year old. Please advise. Thank You, Mark Oine

H98 means the component that produces the microwaves is fried. It costs more to have it replaced than to buy a new microwave, so if it isn't under warranty, throw it away and start shopping.
May 20, 2019

My microwave shows a code H98 why is that? - Q&A - Best Buy

..WARNING on self repairs

https://www.fixya.com/support/r29874712-repairing_microwave_ovens

turn it off. RIP. http://eng-ca.faq.panasonic.com/app/answers/detail/a_id/42101/~/troubleshooting---error-code-h98-appears-in-the-display-window.-oven-has

control circuit problem

The H98 error means that there is a problem with the magnetron, the inverter or the programming circuit. This is an area of the microwave with a high voltage and thus should only be dealt with by a professional from Panasonic service.

I wish that I had better news for you. Unless the microwave is still under warranty, you probably will find it cheaper to replace it.

Cindy Wells

You haven't identified the brand, make or model but this may be helpful:

Newer Panasonic Microwaves have built in fault codes....

they look like H97, H98....
Troubleshooting of Inverter Circuit (U) and Magnetron
This oven is programmed with a self diagnostics failure code system which will help for troubleshooting, H97, H98 and H99 are the provided failure magnetron and inverter circuit problem areas. This section explains failure codes of H97, H98 and H99. H97, H98 and H99 appears in display window a short time after start key is pressed and there is no microwave oscillation.


NOTE:
DO NOT try to REPAIR this Inverter Power Supply (U) and also DO NOT RE-ADJUST PRESET VOLUME on the board. It is very dangerous to repair or adjust without sufficient test equipment because this circuit handles very high voltage and very large current. Off alignment or inverter board operation is dangerous. Operating a misaligned inverter circuit is dangerous due to the very high voltage and current that is produced by this board. Defective boards must be replaced with a new one.
- Check magnetron filament for open or short to casing before proceeding to determine a good magnetron.
Alternative way to troubleshoot oven with AC Ampere meter used.
H97, H98 and H99 appears in display window a short time alter start key is pressed and no microwave oscillation with AC Ampere meter used for troubleshooting.


NOTE:
DO NOT try to REPAIR this Inverter Power Supply (U) and also DO NOT RE-ADJUST PRESET VOLUME on the board. It is very dangerous to repair or adjust without sufficient test equipment because this circuit handles very high voltage and very large current. Off alignment or inverter board operation is dangerous. Operating a misaligned inverter circuit is dangerous due to the very high voltage and current that is produced by this board. Defective boards must be replaced with a new one.
- Check magnetron filament for open or short to casing before proceeding to determine a good magnetron.

Take it back to the place of purchase asp, the standard warranty is one year.

This oven is programmed with a self diagnostics failure code system which will help for troubleshooting, H97, H98 and H99 are the provided failure magnetron and inverter circuit problem areas. This section explains failure codes of H97, H98 and H99. H97, H98 and H99 appears in display window a short time after start key is pressed and there is no microwave oscillation.
There is not a lot the layman can do except maybe to try a new magnetron.
It is a job for an experienced Panasonic Microwave repair man.

the error code H98 refers to the heating filament on the magnetron, unless you are confident I would not progress further

hi
you may be right that it is just the display but it is all one module and most probably will all have tobe replaced
cheers grantsreps

The microwave unit is faulty as you can read from the display or the controller isn't working correctly, you should take your MW oven to an authorized service center. It can be repaired by yourself but it's highly dangerous because it has high voltage inside and microwave energy.