What can we help you find?

Troubleshooting · NavienNavien NFC-250/200H E218Heating return temperature sensor→ Troubleshooting · NavienNavien NFC-250/200H E782Abnormal operation: front/main panel communication→ Troubleshooting · NavienNavien NFC-250/200H E517Abnormal operation: DIP switch setting→ Troubleshooting · NavienNavien NFC-250/175H E030Exhaust overheat→ Troubleshooting · NavienNavien NFC-250/200H E740Abnormal operation: outdoor temperature sensor→ Troubleshooting · NavienNavien NFC-250/200H E773Improper gas type or gas connection detected→ Troubleshooting · NavienNavien NFC-250/175H E441Domestic hot water inlet/outlet 2 sensor open or short→ Troubleshooting · NavienNavien NFC-250/175H E515Abnormal operation: PCB→ Troubleshooting · NavienNavien NFC-250/175H E407Domestic hot water outlet thermistor open or short→ Troubleshooting · NavienNavien NFC-250/200H E003Ignition failure→ Troubleshooting · NavienNavien NFC-250/200H E736Abnormal operation: cascade communication→ Troubleshooting · NavienNavien NFC-250/175H E439Abnormal operation: flow sensor or no domestic water flow detected→