Bradford White Water Heater Error Code 71

Error code 71 indicates a fault in the solenoid valve circuit, covering all four solenoid valves labeled SV0, SV1, SV2, and SV3. The control board has detected an electrical problem such as an open circuit, short, or abnormal resistance in one or more of these valve circuits. The heater shuts down automatically when this code appears to prevent unsafe operation. A wiring inspection and resistance check on each solenoid are required to diagnose the root cause.

When code 71 is active, the heater has already taken itself offline as a safety precaution, so it will not be heating water. You should not attempt to bypass this shutdown. Leave the unit off and have a qualified technician diagnose the solenoid circuit before returning the heater to service.

Repair costs depend on what component has failed. Wiring harness repairs or connector replacements are generally on the lower end, typically in the range of $75 to $200 for labor and parts. Replacing one or more solenoid valves can range from $150 to $400 depending on parts availability and labor rates in your area. A control board replacement, if needed, is usually the most expensive option and can range from $300 to $600 or more.

A reset may temporarily clear the fault display, but the code will return if the underlying electrical problem in the solenoid circuit has not been corrected. Simply resetting the unit without diagnosing the wiring or solenoid condition is not a reliable fix. The fault needs to be properly diagnosed and repaired before the heater will operate normally.

Start by inspecting the wiring harness that runs to all four solenoid valves, checking for loose connectors, damaged insulation, or corroded terminals. Next, use a multimeter to measure the resistance of each solenoid coil individually and compare the readings to confirm they are within the expected range. Replace any solenoid with an open or shorted coil, and repair or replace any damaged wiring. If wiring and solenoids all test correctly, the control board may need to be evaluated.