Display shows E06 and heater will not run

Safety First: Turn off power to the heater before accessing internal components.

• Locate outlet sensor: The outlet water temperature sensor is typically threaded into the outlet header or manifold. Refer to your Rheem model diagram.
• Inspect wiring: Check the sensor harness for damage, corrosion at the connector, or loose pins. Clean contacts and reseat firmly.
• Check sensor resistance: With power off and wires disconnected, measure the sensor resistance with a multimeter and compare to Rheem's temperature/resistance chart. If readings are far out of range, replace the sensor.
• Replace sensor if needed: Drain water from the heater header if required, remove the old sensor, apply thread sealant approved for potable water, and install the new Rheem outlet temperature sensor.