🚨 Root Cause & Troubleshooting Guide

Panasonic Inverter Microwave H97 & H98 Error Code: Causes & Fix

Identified Root Cause:
Inverter power supply module failure, high-voltage diode open circuit, or magnetron filament burnout.

Step-by-Step Diagnostic & Resolution:

Unplug unit for 10 minutes to drain internal capacitors and reset microcomputer memory.

Inspect internal door safety latches: misaligned microswitches often trigger false power inverter cuts.

Verify you are using microwave-safe glass containers; metallic trim or thermal shock ceramics cause arcing reflections.

If H98 recurs after 3 seconds, the inverter power board or 2M261 magnetron tube requires certified replacement.

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