H98 — Outdoor high pressure overload protection

What does H98 mean?

The outdoor unit's high pressure overload protection has activated, indicating excessively high pressure within the system.

• Outdoor high pressure sensor issue.
• Water pump malfunction or water leakage.
• Clogged expansion valve or strainer.
• Excess refrigerant in the system.
• Defective outdoor PCB.

Click steps to track your progress.

1. 1

   Turn off the power supply to the unit at the main breaker and wait at least 5 minutes to allow pressures to equalize.

2. 2

   Check for any obvious water leaks around the outdoor unit or in the heating system.

3. 3

   If the error persists, contact a qualified technician to inspect the high pressure sensor, water pump, and refrigerant levels.