GE Microwave Error Code H98

H98 is a failure code that indicates a problem in the magnetron and/or inverter circuit. It appears shortly after the Start key is pressed when the control system detects that no microwave oscillation is taking place. The code points to either a failed magnetron, a defective inverter board, or a fault somewhere in the high-voltage circuit between those two components.

No. When H98 is active, the microwave is not producing any cooking energy, meaning it is not functioning as intended. Continuing to attempt operation without resolving the fault is not recommended. More importantly, the underlying cause may involve high-voltage components that could pose a safety hazard if the unit is operated or inspected without proper precautions.

Repair costs vary depending on which component has failed. A replacement magnetron typically runs in the range of $50 to $150 for parts, while an inverter board replacement can range from $60 to $200 or more depending on the model. Adding professional labor, total repair costs generally fall between $100 and $350. In some cases, especially on older units, replacement of the appliance may be more cost-effective than repair.

Diagnosing H98 requires pressing a specific key sequence to program the DPC, then performing two inverter circuit tests using an AC ampere meter. While a knowledgeable technician or experienced DIYer can perform these tests, the internal components involved operate at dangerously high voltages. The high-voltage capacitor must be fully discharged before touching any internal parts, and caution is essential throughout.

Simply resetting or unplugging the microwave will not resolve H98. The code is triggered by a detected hardware fault in the magnetron or inverter circuit, and it will reappear when the Start key is pressed if the underlying component failure has not been repaired. The DPC programming sequence and inverter circuit tests are required to properly diagnose and address the issue.