Error Code	Symptom	Fault Type	Guide
E1	E1 error on gas power vent or direct vent Whirlpool water heater, no ignition or unit shuts down	Ignition Lockout	View Details
E2	E2 error on gas power vent model, blower or pressure switch problem, unit will not fire	Blower / Draft Fault	View Details
E3	E3 error on gas model, ECO (energy cut off) or high limit opened, burner will not light	High Limit / ECO Trip	View Details
E4	E4 error on gas model, flammable vapor sensor (FVS) fault or lockout	Flammable Vapor Sensor Activation / Failure	View Details
E5	E5 error on gas model, thermopile or pilot circuit fault, pilot will not stay lit	Thermopile / Pilot Failure	View Details
F01	Control board fault code F01 displayed, water heater unresponsive or stuck in standby	Main Control Board Failure	View Details
F02	F02 error displayed, water heater not heating or shutting down shortly after start	Temperature Sensor (Thermistor) Failure	View Details
F03	F03 error code, water temperature overshoots setpoint or unit shuts down on overheat	Overtemperature / High Limit Trip	View Details
F04	F04 error displayed, no hot water, unit indicates ignition or flame failure on gas model	Ignition Failure / Flame Not Detected	View Details
F05	F05 error code, water heater will not start heating cycle, fan may run briefly then stop (power vent or hybrid models)	Pressure Switch or Air Proving Fault	View Details
F06	F06 error, hybrid or heat pump water heater not heating properly, unit may revert to electric resistance mode	Heat Pump System Fault	View Details
F07	F07 error code, no hot water, elements not energizing on electric or hybrid model	Heating Element Circuit Fault	View Details
F08	F08 error, hybrid water heater shows communication or internal control error, may lock out	Control Communication Error	View Details
F09	F09 error code, water heater not heating, may indicate line voltage or power supply issue	Line Voltage / Power Supply Fault	View Details
F10	F10 error, hybrid water heater indicates condensate or drain issue, may shut down heat pump mode	Condensate Drain Fault	View Details
F11	F11 error code, hybrid water heater shows fan or airflow fault, may run loudly then stop	Evaporator Fan / Blower Fault	View Details
F12	F12 error, hybrid water heater indicates ambient temperature sensor fault, may lock out heat pump mode	Ambient Temperature Sensor Failure	View Details
F13	F13 error code, hybrid water heater indicates evaporator coil sensor fault	Evaporator Temperature Sensor Failure	View Details
F14	F14 error, hybrid water heater indicates discharge or compressor temperature sensor fault	Discharge Temperature Sensor Failure	View Details
F15	F15 error code, hybrid water heater indicates tank temperature sensor fault (upper or lower)	Tank Thermistor Fault	View Details
F16	F16 error, hybrid water heater indicates leak detection or pan sensor fault (on models with leak sensor)	Leak Sensor Activation / Fault	View Details
F17	F17 error code, hybrid water heater indicates compressor overload or high discharge temperature	Compressor Overload / High Discharge Protection	View Details
F18	F18 error, hybrid water heater indicates anode or corrosion protection system fault (on powered anode models)	Powered Anode / Corrosion Protection Fault	View Details
F19	F19 error code, hybrid water heater indicates T&P (temperature and pressure) sensor or switch fault (on monitored models)	T&P Monitoring Fault	View Details
–	Condensation or water on floor around new gas water heater during first operation	Normal Condensation vs. Leak Misdiagnosis	View Details
–	Gas Whirlpool water heater pilot will not light or stay lit (no electronic display)	Pilot Ignition Failure	View Details
–	Hybrid Whirlpool water heater not producing enough hot water in Heat Pump mode	Underperformance in Heat Pump Mode	View Details
–	Hybrid Whirlpool water heater very noisy (compressor/fan) during operation	Excessive Vibration / Noise	View Details
–	Insufficient hot water, runs out quickly on electric Whirlpool water heater	Partial Heating / Lower Element Not Operating	View Details
–	No hot water at all, electric Whirlpool water heater, no error code (non-digital model)	Complete Loss of Heating on Electric Model	View Details
–	Rumbling, popping, or banging noises during heating	Sediment Boiling / Scale Buildup	View Details
–	Sooting or yellow lazy flame on gas Whirlpool water heater	Incomplete Combustion / Venting Issue	View Details
–	T&P relief valve discharging water periodically	Temperature and Pressure Relief Discharge	View Details
–	Water hammer or banging pipes when water heater cycles or valves close	Hydraulic Shock / Water Hammer	View Details
–	Water has rotten egg or sulfur smell, especially hot water	Hydrogen Sulfide Odor Reaction	View Details
–	Water has rusty or discolored appearance from hot taps	Corrosion / Rust Contamination	View Details
–	Water heater leaking from bottom or from tank seam	Tank Rupture / Internal Tank Leak	View Details
–	Water heater leaking from drain valve at bottom	Leaking Drain Valve	View Details
–	Water heater leaks from top around inlet/outlet connections	Top Plumbing Connection Leak	View Details
–	Water heater trips breaker frequently	Electrical Overload / Short	View Details
–	Water too hot, scalding at taps, thermostat set normally	Overheating / Thermostat Stuck Closed	View Details
–	Whirlpool water heater will not start after power outage	Control Lockout / Power Reset Issue	View Details
–	Whistling or high-pitched noise from water heater when hot water is used	Flow Restriction / Partially Closed Valve	View Details

Whirlpool Water Heaters Error Codes

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