Panasonic Air Conditioner Error Code F98

F98 indicates a total running current protection fault. The current transformer detected that input current exceeded the safe operating limit while the compressor was running, and this occurred three times within a 20-minute period. The unit shuts down to prevent damage to the compressor and electrical components. A technician should measure the actual input current and inspect the system before attempting to return it to service.

No. The F98 fault is a protective lockout designed to prevent compressor and electrical component damage from sustained over-current conditions. Repeatedly resetting the unit and allowing it to run while the underlying cause is unresolved risks permanent compressor failure and potential damage to the inverter board or wiring. The unit should remain off until the current draw is verified to be within the specified operating range.

Repair costs vary widely depending on the root cause. A refrigerant adjustment or electrical supply correction may involve only a service call fee, typically in the range of $75 to $200. If the compressor requires replacement, costs can range from $800 to $2,000 or more depending on the unit size and labor rates. An inverter board replacement generally falls in the $300 to $700 range. A technician will need to diagnose the specific cause before providing an accurate estimate.

Some underlying causes, such as a dirty air filter restricting airflow or a tripped breaker from a temporary voltage event, can be addressed without professional tools. However, diagnosing the root cause requires a clamp meter to measure input current, manifold gauges for refrigerant pressure checks, and knowledge of electrical safety around high-voltage components. If the fault recurs after a single restart attempt, a qualified technician should perform a full inspection before further use.

A power reset will clear the fault code and allow the unit to attempt a restart. However, if the condition that caused the over-current is still present, the unit will accumulate three more over-current trips within 20 minutes and display F98 again. A reset is useful as an initial diagnostic step to observe whether the fault is intermittent or persistent, but it does not address the underlying cause.