Error Code	Symptom	Fault Type	Guide
E001	Electronic John Wood gas water heater will not ignite; display shows E001 and burner never lights	Ignition Failure Lockout	View Details
E002	John Wood power vent gas water heater shows E002 and the blower runs but burner does not light	Pressure Switch / Inducer Proving Failure	View Details
E003	Electronic John Wood gas water heater displays E003 and shuts down shortly after burner lights	Flame Loss / Flame Rectification Fault	View Details
E004	John Wood power vent water heater shows E004 and will not start; blower does not run	Blower Motor / Power Vent Failure	View Details
E005	John Wood electronic gas water heater shows E005 and shuts down; tank is very hot to the touch	Overheat / ECO (Energy Cut-Off) Trip	View Details
E006	John Wood power vent water heater displays E006 and shuts down during operation	Exhaust Overheat / Vent Temperature Fault	View Details
E007	John Wood electronic gas water heater shows E007 and will not operate after a power surge or outage	Control Board Communication / Internal Fault	View Details
E008	John Wood power vent water heater displays E008 and cycles off shortly after starting	Intake Air Restriction / Combustion Air Fault	View Details
E009	John Wood electronic gas water heater shows E009 and does not respond to temperature adjustments	User Interface / Keypad Failure	View Details
E010	John Wood electronic gas water heater displays E010 and shuts down; no hot water	Temperature Sensor Open/Short Circuit	View Details
E011	John Wood power vent water heater shows E011 and the burner shuts off randomly	Flue Gas Spill / Draft Safety Switch Trip	View Details
E012	John Wood electronic gas water heater shows E012 and will not ignite; igniter does not glow or spark	Igniter Circuit Failure	View Details
E013	John Wood electronic gas water heater displays E013 and the burner shuts off shortly after lighting; strong flame rollout observed	Flame Rollout / Combustion Chamber Overheat	View Details
E014	John Wood electronic gas water heater shows E014 and the burner does not light; gas odor may be present near unit	Gas Valve Fault / Stuck Closed or Open	View Details
E015	John Wood electronic gas water heater displays E015 and the burner cycles rapidly on and off	Short Cycling / Sensor Calibration Fault	View Details
E016	John Wood power vent water heater shows E016 and the blower runs continuously even when there is no hot water demand	Stuck Relay / Control Output Fault	View Details
E017	John Wood electronic gas water heater displays E017 and the burner will not light; code appears immediately on startup	Internal Self-Test Failure	View Details
E018	John Wood power vent water heater shows E018 and shuts down during windy conditions	Wind Pressure / Vent Pressure Fault	View Details
E019	John Wood electronic gas water heater displays E019 and the burner shuts off; condensate present around base on condensing model	Condensate Drain Fault	View Details
E020	John Wood electronic gas water heater shows E020 and the burner does not light; code appears after long idle period	Low Line Voltage / Power Supply Fault	View Details
–	John Wood atmospheric gas water heater pilot will not stay lit; pilot lights briefly then goes out when knob is released	Thermocouple Failure / Pilot Safety Circuit Fault	View Details
–	John Wood electric water heater has power but no hot water; elements test good	Thermostat Control Failure (Electric)	View Details
–	John Wood electric water heater trips the circuit breaker repeatedly	Electrical Overload / Short Circuit	View Details
–	John Wood FVIR (Flammable Vapor Ignition Resistant) gas water heater pilot will not light at all; no flame at pilot	Pilot Gas Supply / FVIR Air Intake Restriction	View Details
–	John Wood FVIR gas water heater shuts off and will not relight after suspected flammable vapor event	FVIR Safety System Lockout	View Details
–	John Wood gas water heater burner does not ignite even though pilot is lit and stable	Main Burner Ignition Failure	View Details
–	John Wood gas water heater produces insufficient hot water; runs out quickly compared to normal	Recovery Rate / Capacity Deficiency	View Details
–	John Wood power vent water heater blower runs but there is a strong exhaust smell in the mechanical room	Vent Leakage / Backdrafting	View Details
–	John Wood water heater causes discolored (rusty or brown) hot water	Corrosion / Rust Contamination	View Details
–	John Wood water heater emits a burning or electrical smell near the control area	Overheating Electrical Component	View Details
–	John Wood water heater emits a rotten egg or sulfur smell from hot water taps	Hydrogen Sulfide Odor Reaction	View Details
–	John Wood water heater frequently cycles on and off, causing temperature swings at taps	Short Cycling / Thermostat Hysteresis Issue	View Details
–	John Wood water heater hot water pressure is significantly lower than cold water pressure	Restricted Hot Outlet / Scaling	View Details
–	John Wood water heater hot water temperature fluctuates significantly during a single shower	Temperature Stability / Mixing Issue	View Details
–	John Wood water heater leaks from the top around the hot or cold water connections	Leaking Nipple / Dielectric Union / Piping Joint	View Details
–	John Wood water heater leaks water from the drain valve at the bottom of the tank	Leaking Drain Valve	View Details
–	John Wood water heater makes a high-pitched whistling or hissing noise when heating	Restricted Flow / Partially Closed Valve	View Details
–	John Wood water heater makes popping or rumbling noises during heating	Sediment Boiling / Scale Buildup	View Details
–	John Wood water heater produces no hot water at all; burner or elements never turn on	No Heat / Complete Shutdown	View Details
–	John Wood water heater tank is leaking from the side or bottom; rust stains visible	Tank Corrosion / Inner Tank Rupture	View Details
–	John Wood water heater vibrates excessively or makes banging noises in the vent or piping	Water Hammer / Combustion or Vent Vibration	View Details
–	Water leaking from the temperature and pressure (T&P) relief valve on a John Wood water heater	T&P Valve Discharge	View Details

John Wood Water Heaters Error Codes

No matching codes found