Panasonic Air Conditioner Error Code H98

H98 indicates indoor high pressure protection has activated during heating operation. The indoor heat exchanger thermistor has detected an abnormally high coil temperature, causing the unit to shut down to protect itself. The fault is stored in memory and the unit will not resume operation until the cause is addressed. The most common trigger is restricted airflow due to a dirty intake air filter.

No, you should not attempt to override or continuously reset the unit while the underlying problem remains unresolved. The H98 shutdown is a protective function designed to prevent damage to the compressor and refrigerant components from sustained high-pressure and high-temperature conditions. Repeated forced restarts without correcting the fault can cause serious and costly component damage.

If the cause is simply a dirty filter or airflow blockage, the fix costs little to nothing beyond the price of a replacement filter, typically in the range of a few to around thirty dollars. If the blower motor has failed, parts and labor can range from roughly one hundred fifty to four hundred dollars depending on the model and local labor rates. Refrigerant system repairs such as recharging, leak repair, or expansion valve replacement typically range from two hundred to over six hundred dollars.

In many cases, yes. Start by turning off the unit and cleaning or replacing the indoor air filter, then check that nothing is blocking the air intake or discharge grille. If the error returns after these steps and the airflow path is clear, the cause is likely inside the refrigerant system, which requires a certified HVAC technician to diagnose and repair safely.

Because H98 is stored in memory, a simple power reset may temporarily clear the displayed code, but the fault will return if the root cause has not been corrected. The unit should not be restarted until the airflow path has been inspected and any restrictions removed, or a technician has confirmed the refrigerant system is operating normally.