Girard RV water heater fault codes
RV water heaters (gas, electric or both) commonly lock out when the burner fails to light. Some boards flash a status light; others simply stop and require a reset.
How to read the code
Confirm whether you are on gas or electric, check for a tripped reset, and note any status-light pattern before resetting power.
All documented codes
E0 warning
The outlet (hot side) water temperature sensor reads an invalid value. The control board s… E1 warning
Ignition failure. The igniter sparked but the board never confirmed a flame, so after its … E2 warning
Flame sensing was interrupted during normal operation. The burner had lit, but the board l… E3 warning
The ECO (energy/over-temperature cut-off) thermostat opened, either before ignition or dur… E4 warning
The inlet (cold side) water temperature sensor reads an invalid value while water is flowi… E5 warning
Blower/fan motor fault. The control board commanded the combustion blower to run but recei… E6 warning
Over-temperature condition. The outlet water temperature exceeded the safe limit (around 1… E8 warning
Air pressure (vacuum) switch fault. The switch that confirms the blower is moving air did …
The outlet (hot side) water temperature sensor reads an invalid value. The control board s… E1 warning
Ignition failure. The igniter sparked but the board never confirmed a flame, so after its … E2 warning
Flame sensing was interrupted during normal operation. The burner had lit, but the board l… E3 warning
The ECO (energy/over-temperature cut-off) thermostat opened, either before ignition or dur… E4 warning
The inlet (cold side) water temperature sensor reads an invalid value while water is flowi… E5 warning
Blower/fan motor fault. The control board commanded the combustion blower to run but recei… E6 warning
Over-temperature condition. The outlet water temperature exceeded the safe limit (around 1… E8 warning
Air pressure (vacuum) switch fault. The switch that confirms the blower is moving air did …