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Honeywell Service Manuals & Error Codes
14Service Manuals
9Error Codes
3Appliance Types
Honeywell Appliance Types
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Top Error Codes for Honeywell
CodeTypeDescription
ErrHVACGeneral error indicator displayed on screen with a bright red light in the...0 FlashesWater HeaterControl is off or pilot is out.1 FlashWater HeaterNormal operation (bright/dim heartbeat).2 FlashesWater HeaterThermopile voltage is low.4 FlashesWater HeaterTemperature exceeded (ECO activated).5 FlashesWater HeaterSensor failure.7 FlashesWater HeaterInternal control failure.8 FlashesWater HeaterPower off failure.Status Light On (solid)Water HeaterPilot light was recently extinguished and the thermopile is cooling down.