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Troubleshooting · NavienNavien NPE-A2 Series E773: Improper gas type or gas connection detectedTroubleshooting code E773
Troubleshooting · NavienNavien NPE-S2 Series E773: Improper gas type or gas connection detectedTroubleshooting code E773
Troubleshooting · NavienNavien NPN-U Series E127: Abnormal operation: air pressure sensor or air volume controlTroubleshooting code E127
Troubleshooting · NavienNavien NPN-U Series E157: Abnormal operation: air volume controlTroubleshooting code E157
Troubleshooting · NavienNavien NPN-U Series E773: Improper gas type or gas connection detectedTroubleshooting code E773
Troubleshooting · NavienNavien NPN-U Series E786: Improper front panel or panel connectionTroubleshooting code E786
Troubleshooting · NavienNavien NPN-E Series E127: Abnormal operation: air pressure sensor or air volume controlTroubleshooting code E127
Troubleshooting · NavienNavien NPN-E Series E157: Abnormal operation: air volume controlTroubleshooting code E157
Troubleshooting · NavienNavien NPN-E Series E773: Improper gas type or gas connection detectedTroubleshooting code E773
Troubleshooting · NavienNavien NPN-E Series E786: Improper front panel or panel connectionTroubleshooting code E786
Troubleshooting · NavienNavien NCB-H Series E773: Improper gas type or gas connection detectedTroubleshooting code E773
Troubleshooting · NavienNavien NCB-H Series E784: Abnormal operation: zone controller communicationTroubleshooting code E784
