Error Code 99 signals a critical issue: “Decrease in Fan Motor Ventilation (Operation Stop). This means the Rheem Continuous Flow Water Heater has detected significantly reduced airflow from the combustion fan, triggering an automatic safety shutdown.
Immediately switch off power at the electrical isolation switch and cease all hot water usage. Error Code 99 involves a critical fan ventilation failure, posing potential safety hazards from improper combustion or exhaust. Contact Hilton Plumbing immediately for professional inspection and urgent repair.
Book online or call us directly at 1300 872 343.
