Service Manual

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Troubleshooting
All other error codes will put the water heater into “hard” lockout condition, in which the water heater will not
operate and cannot be reset in the User Mode. To reset a hard lockout, first enter Service Mode described
earlier by pressing both the “Temperature Up” and “Select” buttons at the same time for 3 seconds. Then press
the lower right button under “Lockout Reset” in the water heater display and hold for 3 seconds.
Error Code Definitions
If the water heater has an operating problem, there will be a number in the water heater display with “Service
Needed” shown below the error code number. Note the error code and the definition in the chart below. This
label appears on the control box under the water heater display. The following sections will provide instructions
for servicing each error code.
Step 1. Press for 3 seconds to enter
Service Mode.
Step 2. Press for 3 seconds to reset the
control in Service Mode.
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