Rinnai Rinnai V75iN Value Series Tankless Water Heater 71 Error Fix: Gas Solenoid Valve Circuit Fault

Error code 71 on the Rinnai Rinnai V75iN Value Series Tankless Water Heater means: Gas Solenoid Valve Circuit Fault. An electrical fault has been detected in the gas solenoid valve circuit on the control board. While error 52 indicates the gas valve itself has failed, error 71 indicates the control circuitry that drives the solenoid valve has a fault. This could be a failed transistor, relay, or trace on the control board, or a short/open in the wiring harness between the board and the gas valve. Check the wiring harness between the control board and gas valve for damage, pinched wires, or disconnected plugs. If wiring is intact, the control board may need replacement. In some cases, a faulty gas valve can cause an overcurrent condition that damages the board circuit, so both components may need replacement.

The most successful fix is "Test and Replace Control Board and/or Gas Solenoid Valve" (hard difficulty, ~120 minutes). This fix costs nothing. HomeMD has 2 community-ranked fixes for this error.

This error is rated critical severity. It is generally not urgent and can often be resolved with a simple DIY fix.

Yes — the top-ranked community fix ("Test and Replace Control Board and/or Gas Solenoid Valve") is rated hard difficulty and takes about 120 minutes. Tools needed: Phillips screwdriver, Multimeter, Adjustable wrench.

DIY cost: $0. Professional repair typically costs $400-$650. Many homeowners save money by trying the top-ranked community fix first.

The Rinnai Rinnai V75iN Value Series Tankless Water Heater has 8 other known error codes, including: 02 (Ignition Failure), 03 (Bath Fill Function Abnormality), 05 (Blocked Exhaust / Air Supply), 10 (Blocked Exhaust — Air Pressure Switch), 11 (No Ignition), and 3 more.

Error code 71 also appears on 8 other Rinnai models: Rinnai RE180iN RE Series Non-Condensing Tankless Water Heater, Rinnai RL75iN RL Series Tankless Water Heater, Rinnai RL94iN RL Series Tankless Water Heater, Rinnai RSC160iN Condensing Combi Boiler, Rinnai RU130iN Sensei Super High Efficiency Plus Tankless Water Heater, Rinnai RU199iN Sensei Super High Efficiency Plus Tankless Water Heater, and 2 more. The fix may vary by model, so check each model's specific page for tailored repair steps.