71
Rinnai Gas Valve Circuit Fault

Boiler shows error 71; may occur after component replacement or wiring changes.

Advertisements

Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Advertisements

Possible Causes

Open or shorted gas valve coil, Incorrect gas valve wiring, Damaged gas valve connector, Control PCB gas valve driver failure

How to Fix / Troubleshooting

Safety first: Turn off power and gas. Never energize a suspected faulty gas valve.

  • Inspect gas valve wiring: Confirm that the gas valve connector is correctly oriented and fully seated. Look for pin damage or corrosion.
  • Check for physical damage: Examine the gas valve body for cracks, impact damage, or signs of overheating.
  • Do not attempt coil measurements unless trained: Testing gas valve coils should be done by a qualified technician with the correct specifications.
  • Professional repair: Replacement of the gas valve and, if necessary, the control PCB must be followed by leak testing and combustion analysis.
Advertisements

Repair Difficulty

Professional Required 5/5

Required Part

Gas Valve Assembly
Check Price on Amazon

We may earn a commission from links on this page.

Advertisements