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 — the over-temperature cut-off thermostat — opened, either before ignition or duri… 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. The outlet water temperature exceeded 60 °C (140 °F) for three seconds a… E7 warning
Linear valve failure. The controller detected an open circuit in the linear gas valve cont… E8 warning
Air pressure (vacuum) switch fault. The switch that confirms the blower is moving air did … E9 warning
Flame sensor fault, and specifically the inverted case: the board sees a flame signal *bef… En / End info
Not a fault. This is the system timer: the board ends the burn after 20 minutes of continu…
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 — the over-temperature cut-off thermostat — opened, either before ignition or duri… 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. The outlet water temperature exceeded 60 °C (140 °F) for three seconds a… E7 warning
Linear valve failure. The controller detected an open circuit in the linear gas valve cont… E8 warning
Air pressure (vacuum) switch fault. The switch that confirms the blower is moving air did … E9 warning
Flame sensor fault, and specifically the inverted case: the board sees a flame signal *bef… En / End info
Not a fault. This is the system timer: the board ends the burn after 20 minutes of continu…