Rheem Water Heater Error Code 65

Error code 65 on a Rheem water heater indicates a fault with the water flow solenoid. This is the electromechanical valve responsible for controlling water movement through the heater during operation. The unit shuts down when it detects an abnormal signal from this component to prevent further damage. A qualified technician should inspect the solenoid, its wiring, and the control board to identify the specific cause.

When error code 65 is active, the Rheem water heater has typically shut down the heating cycle to protect itself from damage. Attempting to force the unit to operate without resolving the fault is not recommended. You should stop using the heater and contact a qualified technician to evaluate the system before restoring operation.

Resetting the unit may temporarily clear the error code, but it will return if the underlying fault with the water flow solenoid has not been corrected. A reset does not repair a failed solenoid coil, damaged wiring, or a faulty control board. The issue must be properly diagnosed and the defective component repaired or replaced to permanently resolve error code 65.

Rheem recommends contacting a dealer or qualified service technician to diagnose and repair error code 65. The repair involves both electrical and plumbing components, and incorrect handling can cause water damage or electrical hazards. A homeowner comfortable with appliance repair may inspect wiring connections for obvious looseness or corrosion, but replacing the solenoid or testing the circuit requires proper tools and technical knowledge.

Repair costs for error code 65 vary depending on the root cause. A wiring repair or connection fix may cost between $75 and $200 in labor. Replacing the water flow solenoid assembly typically runs between $150 and $400 depending on the part and labor rates in your area. If the control board is also involved, costs can be higher, ranging from $300 to $600 or more.