Atwood 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.
Models covered: every code below applies to the Atwood G6A-8E.
All documented codes
DSI Fault / Lock-Out warning
On Atwood DSI (Direct Spark Ignition) water heaters there is no multi-digit numeric code. … ECO open / tripped warning
The ECO is a backup high-limit temperature switch wired in series with the control. On DSI… Gas & spark, no flame proven warning
A diagnostic sub-condition of the DSI lock-out: both gas and spark are present but the fla… Gas present, no spark warning
A diagnostic sub-condition of the DSI lock-out from the official trouble-shooting guide: g… No spark / no ignition danger
Dead unit with no spark at the electrode and no lockout-light activity, typically caused b… Spark present, no gas warning
A diagnostic sub-condition of the DSI lock-out from the official trouble-shooting guide: t… TCO (thermal cut-off) tripped danger
Current Atwood DSI water heaters have a one-shot thermal cut-off device on the incoming po…
On Atwood DSI (Direct Spark Ignition) water heaters there is no multi-digit numeric code. … ECO open / tripped warning
The ECO is a backup high-limit temperature switch wired in series with the control. On DSI… Gas & spark, no flame proven warning
A diagnostic sub-condition of the DSI lock-out: both gas and spark are present but the fla… Gas present, no spark warning
A diagnostic sub-condition of the DSI lock-out from the official trouble-shooting guide: g… No spark / no ignition danger
Dead unit with no spark at the electrode and no lockout-light activity, typically caused b… Spark present, no gas warning
A diagnostic sub-condition of the DSI lock-out from the official trouble-shooting guide: t… TCO (thermal cut-off) tripped danger
Current Atwood DSI water heaters have a one-shot thermal cut-off device on the incoming po…
Which of these codes apply to your model?
Not every code below exists on every Atwood water heater. Pick your model number to see only the table that applies to it — and which codes it will never show.