GE heat pump water heater shows F8 and may shut down or switch to electric-only mode.

Safety: Turn off power at the breaker. Do not attempt to open the sealed refrigeration system unless you are certified.

User-level checks for F8:

• Clear airflow paths: Ensure at least the manufacturer-recommended clearance (often 6–12 inches) around the unit. Remove boxes, dust, and debris from intake and exhaust grilles.
• Clean evaporator coil: With power off, remove the upper cover and gently vacuum dust from the evaporator fins using a soft brush attachment. Do not bend fins.
• Check ambient conditions: Verify the installation space meets GE’s temperature requirements (typically 45–120°F). Very low or high ambient temperatures can trigger pressure faults.
• Reset power: Restore power and monitor operation. If F8 recurs, a sealed system issue (refrigerant charge, restriction, or high-pressure switch) is likely.

Professional service: A technician should check refrigerant pressures, high-pressure switch operation, and system charge. Do not attempt to add or remove refrigerant yourself.